TW202425883A - A method for redistribution of body pressure distribution by a support device - Google Patents

Abstract

A METHOD FOR REDISTRIBUTION OF PRESSURE PROVIDED BY A SUPPORT DEVICE AND THE SYSTEM THEREOF. The present invention focuses on the pressure injury appeared on one or more bony processes of the human body. When the user's body is supported by a supporting device such as a mattress, the body posture is acquired by referring to the measured two-dimensional pressure distribution. Next, one or more bony processes of the human body are identified by referring to the user's pathological information. Then, by analyzing the pressure injury probability and corresponding pressure of each bony process, the pressure applied by the supporting device to different parts of the user's body are adjusted. Thus, the risk of the pressure injury on all bony pressures are decreased.

Description

A method and system for redistributing body pressure distribution using a support device

The present invention relates to a method and system for redistributing body pressure distribution by a support device, which can improve the shortcomings of traditional pressure sore prevention mattresses, which cannot accurately predict pressure injuries at high-risk parts of the human body and effectively treat them. The present invention uses artificial intelligence technology combined with a clinical research database and a driving device of a lying mattress to effectively reduce the probability of pressure injuries occurring at the bony prominences of the user's body.

Although directly reducing the airbag pressure on the parts of the body that are subject to greater pressure can reduce the probability of bedsores in these parts of the body, some of the parts of the body that are more prone to pressure injuries are not completely consistent with the parts of the body that are subject to greater pressure. For example, the buttocks are often not a high-risk area for pressure sores, but the coccyx, which is located no more than ten centimeters above the buttocks, is often a high-risk area for pressure sores. In other words, the bone prominences of the human body are naturally unevenly distributed, so the ability of different locations to withstand critical pressure will be different. The tolerance of thin skin and more bones is poor, while the tolerance of thick skin and more flesh is better, causing certain specific parts to become high-risk areas for pressure sores. Therefore, existing commercial products and related technology developments often cannot specifically treat one or more parts of the human body that are more prone to pressure injuries. This is because when the user is lying, sitting or lying on the support device, the parts of the user's body that are under greater pressure are often the parts of the user's body that are in direct contact with the support device, such as the buttocks, thighs, calves, shoulders and abdomen, which have more muscles, fat and subcutaneous tissue. It can buffer the impact of pressure on blood circulation and body tissues, or it can transfer and distribute the pressure on this part to nearby parts of the body, thereby reducing the probability of injury caused by continuous pressure or sudden high pressure.

In contrast, one or more apophysis of the human body is almost directly covered by the skin, with less muscle, fat and subcutaneous tissue between the skin and the bone, and a lack of blood vessels for adequate blood circulation, so that the pressure on the apophysis is often unable to be buffered or transferred, and is more susceptible to injury than other parts of the body when subjected to the same pressure, especially the small amount of subcutaneous tissue and a small amount of muscle at the apophysis, which are also easily injured by continuous long-term continuous pressure or short-term strong pressure. In other words, apophysis is often prone to pressure injuries, even if it is not the part of the user's body that is subjected to the greatest pressure. Therefore, the existing method of directly reducing the pressure on the parts subject to higher pressure (e.g. adjusting the air volume of the airbag to change the pressure on the contact between the human body and the airbag) is basically unable to effectively improve the problem of pressure injuries easily occurring on the bony prominences of the human body due to pressure, even though these bony prominences and the parts of the body subject to higher pressure are often adjacent to each other. Figure 1A shows the coordinates of the high-risk parts of the bony prominences where the user's body is in direct contact with the support device in body postures (supine position, lateral position and half-sleeping position).

It is generally known that the internal pressure of an airbag is in a uniform pressure state, but the reaction pressure on the external surface caused by the airbag under external force is not uniformly distributed, and will vary with the height fluctuation of the intersection of the force-applying object and the airbag surface. For example, as shown in Figure 1B, even if a disc object and a cone-shaped object of the same weight act on the same airbag, the local pressure caused will show different reaction pressure distributions, and the greater the shape fluctuation, the more serious the uneven pressure caused, as shown in Figure 1C.

The human body has an undulating appearance, not a flat structure. Therefore, when a person lies on a soft mattress, the rebound and tension of the mattress body will inevitably cause the reaction pressure of the body pressure to present different degrees of uneven pressure distribution with the height and hardness of the mattress, as shown in Figure 1C. When the mattress is mainly composed of several partitioned air bags, the pressure changes of the air bags inflated in each area will change the shape and hardness of the bed. The saturated pressure generally mentioned is often misunderstood as the air pressure in the air bag. The saturated pressure is the saturated internal air pressure. The actual pressure comes from two sources: one is the body pressure, and the other is the internal pressure of the air bag.

Therefore, when the pressure of individual airbags is adjusted, it will be linked to the distribution of the overall surface action and reaction pressure. Taking Figure 1C as an example, the airbags in the P1~P6 zones are inflated with equal pressure, which will show an extremely high external surface pressure distribution in the buttocks area. If more pressure is applied to the airbags in the P3 zone (for example, inflating and hardening), it will be found that the pressure on the waist and back gradually increases, while the pressure on the buttocks gradually decreases. This is because the total weight of the human body is fixed. If the support force distribution in a certain area increases, it will inevitably cause the support force in other parts to decrease, forming a new balance. From the principles of physics, it can be known that the air cushion can redistribute the local pressure distribution of the lying body pressure and reaction force by adjusting the airbag pressure in each zone. Traditionally, it is believed that an air cushion mattress can directly increase or decrease the surface reaction pressure of the human body by simply inflating or deflating the air pressure in the airbag. This method does not do any meaningful work to reduce the surface pressure of the actual human body. Existing technologies are all centered on the adjustment of a single airbag, that is, first calculating a single part of the human body where pressure damage may occur, and then adjusting the internal airbag pressure of the single airbag corresponding to that part. However, no matter how precisely this method analyzes the location of the damage, the relative method that can be used to deal with it is still simply to adjust the internal air pressure of the corresponding single airbag, and it is impossible to effectively achieve the means of adjusting the relative risk parts.

In summary, the current relevant industry urgently needs to develop a new method and system for redistributing body pressure through a support device to reduce or even eliminate the risk of pressure injuries to the user's body.

Different from the traditional method of directly inflating and deflating the airbags, when regulating the pressure distribution of the human body, the pressure distribution of the human body on the air cushion and the interaction between the airbags in each zone should be correctly considered and calculated as a whole to understand how to redistribute the internal gas pressure of all the airbags in each zone and combine them. Ultimately, the reaction pressure on the human body when lying down can be redistributed evenly or achieve other expected distribution forms to eliminate the risk of epidermal pressure damage to bedridden patients. One purpose of the present invention is to provide a method for redistributing body pressure distribution of a support device: first, when a user is supported by a support device, such as sitting or lying on a mattress, a plurality of pressure sensors in the support device are used to measure and generate a two-dimensional pressure distribution corresponding to the pressure applied by the human body to the support device (or the pressure received by the human body due to contact with the support device). Then, the two-dimensional pressure distribution is analyzed to infer the current body posture of the user, that is, how the skeletal muscles of the user's body are distributed on the support device is inferred from the measured pressure distribution, and the characteristic parameters of the pressure distribution can be calculated to judge the current posture of the user. Then, the body posture is analyzed to calibrate the positions of one or more bony protrusions of the user's body on the support device. That is, the method does not seek to find one or more places on the user's body that are subjected to greater pressure, but rather seeks to find one or more places on the user's body that are more likely to be injured due to continuous or sudden high pressure. Next, determine whether the probability of pressure injury corresponding to one or more bony prominences is acceptable. For example, whether the probability of occurrence is less than or equal to a common critical probability value of all bony prominences, or less than a critical probability value of each individual bony prominence. If the above conditions are met, it is acceptable. If all are acceptable, no further treatment will be performed. If not all are acceptable, the support force generated by one or more support units must be adjusted cyclically until the probability of pressure injury corresponding to all bony prominences is acceptable.

Obviously, the main difference between the method of redistributing body pressure of a support device proposed by the present invention and the existing method of improving bedsores is that the method proposed by the present invention first finds one or more bony protrusions of the user's body at one or more specific positions on the support device, and adjusts the different supporting forces applied by the support device to different parts of the user's body as needed, so as to reduce the pressure on the user's body at the one or more bony protrusions, thereby reducing or even eliminating the probability of pressure injuries at these bony protrusions. In other words, how to find the location of the bony prominence, how to determine the probability of pressure injury at the bony prominence, and how to adjust the different supporting forces applied by the support device to different parts of the user's body to reduce or even eliminate the probability of pressure injury at the bony prominence are the main features of the method proposed by the present invention.

Another purpose of the present invention is to reduce and eliminate pressure injuries that are prone to occur at bone protrusions and to adjust the pressure on various parts of the user's body. That is, to propose a method for redistributing the body pressure distribution on the support device. Compared with existing commercial products and existing technical research and development that focus on bedsores that are prone to occur at parts of the body that are subject to greater pressure and directly reducing the pressure on parts of the body that are subject to greater pressure, the present invention The technical feature of the invention is to first find out the overall two-dimensional pressure distribution of the body surface, and then, after determining the body posture of the user on the support device, find out the position of the human bone protrusions on the support device. It is also necessary to determine the probability of pressure damage at each bone protrusion and then determine how to adjust the pressure applied by the support device to the user's body to reduce the probability of pressure damage at each bone protrusion. That is to say, starting from when the user sits, lies or lies on a support device such as an air cushion, how to measure the pressure generated by the contact between the user's body and the support device, how to generate a two-dimensional pressure distribution relative to the user's body, and how to generate the user's body posture from the two-dimensional pressure distribution, etc. can be the same as existing products/techniques. However, existing products/techniques directly find out one or more parts of the user's body that are under greater pressure from the user's body posture, and directly adjust the pressure applied to the one or more parts by the support device. However, the present invention is to find one or more bony protrusions of the user's body from the user's body posture, and adjust the support force applied by the support device to the user's body to reduce the pressure on the one or more bony protrusions and the probability of pressure damage, that is, to redistribute the corresponding pressure of each part of the entire body pressure distribution. Then, a new overall two-dimensional pressure distribution of the body surface is re-corresponded. If the optimized two-dimensional pressure distribution is not achieved, the above steps are repeated until the optimized two-dimensional pressure distribution is achieved, and the airbags of the airbag group will also be continuously adjusted to the optimal pressure configuration.

Another object of the present invention is to provide a method for a support device to redistribute body pressure distribution, which includes obtaining a two-dimensional pressure image, obtaining characteristic parameters from the two-dimensional pressure image analysis, and obtaining body shape factors (height, weight, waist circumference, limb defects) ), from the above comparison of machine learning and big data, we can get the lying posture and the coordinate positions of each bony protrusion point. From the lying posture, we can get those points that will be compressed (lying down). Different from lying on the side), according to the characteristics of the pressure image and the lying posture, the specific bone prominence coordinates can be calibrated, compared with the clinical database and the coordinate pressure of the dangerous part of the bone prominence can be calculated to be safe, and then converted back to the support unit What shape or hardness should be used to meet the pressure redistribution pattern? The support device is driven while the pressure distribution is fed back. Repeat the operation until the target pressure is met.

300: Improved pressure damage system

301: Support device

3011: Support unit

3012: Pressure sensor

3013: Interface module

302: Control device

309: User's body

410, 420, 430, 440, 450: Step blocks

Figure 1A is a schematic diagram of human body posture and corresponding bony prominences.

Figures 1B and 1C are schematic diagrams showing the relationship between the pressure distribution in the human body and the pressure distribution inside the airbag.

Figures 2A to 2D are schematic diagrams of a method for redistributing body pressure using a support device according to the present invention.

Figures 3A and 3B are schematic diagrams of the system architecture of a method for redistributing body pressure using a support device according to the present invention.

Figure 4 is a basic flow chart of a method for redistributing body pressure distribution using a support device proposed by the present invention.

Figures 5A and 5B are schematic diagrams of the application of the present invention.

The basic concept of a method for redistributing body pressure distribution of a support device proposed by the present invention is shown in Figures 2A to 2D. First, as shown in Figure 2A, when the user's body is on the support device, the pressure on different parts of the support device is measured to obtain a two-dimensional pressure distribution corresponding to the user's body posture. This diagram takes the user lying on his back or lying on his side on the support device as an example. It can be seen that the parts corresponding to the user's shoulders and hips will have greater pressure. Then, the user's body posture is inferred based on this two-dimensional pressure distribution. Generally speaking, artificial intelligence can be used to perform the inference, thereby utilizing the huge computing power of artificial intelligence and its ability to learn more and more accurately. Then, as shown in FIG2B , the positions of the various bony protrusions where the user's body and the support device meet are calibrated based on the inferred user's body posture. In this diagram, the bony protrusions are marked with a cross when the user's body posture is lying on the front or lying on the side. The reason why the body posture needs to be identified first is that the bony protrusions where the user's body and the support device meet are not completely consistent in different body postures. For example, when the user is lying on the side, the coccyx (tail vertebrae) of the user cannot directly contact the support device, while when the user is lying on the front, the hipbone of the user cannot directly contact the support device. After the body posture is identified, it is necessary to calculate which bony protrusions will be in contact with the support device to determine the coordinates of each of these bony protrusions on the support device (for example, calibrate based on the external contour and internal undulation characteristics).

As shown in Figure 2C, the part of the user's body that is subjected to greater pressure is not necessarily the bony protrusion of the user's body (indicated by a triangle), although the two are often close to each other. As shown in Figure 2D, along the straight line A-A that runs through the middle of the human body from head to tail, the pressure on different parts of the human body is different, but there will always be one or more parts that are subjected to a pressure that is not less than this critical pressure value. From the figure, it can be clearly understood that the pelvis directly corresponds to the critical pressure (high-risk area pressure), but there are also more muscles and fat here to buffer and disperse the pressure, so the peak pressure is not absolutely equal to the actual fatigue part, and this place is a safe zone. In contrast, a section of the spine that is skinny and directly bears pressure (for example, sacrum strain) corresponds to a lower critical pressure and becomes a relatively dangerous area. If the pressure is continuously and cumulatively borne for more than three hours, the pressure level that causes tissue abnormalities will serve as the critical pressure value for inducing pressure sores. Among them, the critical pressure of pressure injury is related to body shape, body shape, and health status, and can be defined by clinical research data or pressure injury literature data. It must be noted that the prior art directly pre-sets the location of the pressure peak as the strained part by inference, and then directly adjusts the air pressure in the airbag where the pressure peak is located, which still fails to effectively alleviate the damage to the actual strained part. Therefore, the present invention proposes that when the user's body weight is fixed, the pressure on different parts of the human body can be adjusted to reduce or even eliminate the probability of any part of the human body being subjected to a pressure higher than the critical pressure value, that is, to perform pressure reconfiguration. Since the user's body weight is fixed, reducing the pressure on a certain part will inevitably increase the pressure on other parts. Therefore, a major principle when adjusting the pressure on various parts of the human body is that after the adjustment, the pressure on one or more parts of the human body that are prone to pressure damage should be less than this critical pressure value. It is better to make the pressure on any part of the human body less than this critical pressure value after the adjustment, rather than just reducing the pressure on various parts of the human body that are greater than this critical pressure value before the adjustment. In addition, when actually adjusting various support units (such as air bags) to adjust the pressure on various parts of the user's body, it is generally necessary to reduce the number of support units that need to be adjusted as much as possible (such as the number of air bags whose inflation level is adjusted).

The basic system architecture of the support device redistribution method of the present invention is shown in Figures 3A and 3B. The system 300 for improving pressure injury in this way at least includes a support device 301 and a control device 302, and the support device 301 at least includes a plurality of support units 3011, a plurality of pressure sensors 3022 and an interface module 3013. These support units 3011 are located inside the support device 301 and are arranged in a two-dimensional array (a first two-dimensional array) with each other, and can generate the same or different support forces respectively. The pressure sensors 3012 are located between the support units 3011 and the specific side of the support device 301 that contacts the user's body (or supports the user's body), and are arranged to form a two-dimensional array (a second two-dimensional array) inside the support device 301. Thus, the support units 3011 can generate support forces to support the user's body who is sitting, lying or lying on the specific side of the support device 301, and the pressure sensors 3012 can sense the pressure on various parts of the user's body on the specific side, thereby generating a two-dimensional pressure distribution corresponding to the user's body posture. The interface module 3013 is connected to the support unit 3011 and the pressure sensor 3012 respectively, so as to transmit information for adjusting the support force generated by one or more support units 3011 respectively, and receive the pressure value from the specific side measured by one or more pressure sensors 3012 respectively (i.e., the pressure value between the user's body and the support device). The interface module 3013 is connected to the control device 302, and the control device 302 adjusts the support force generated by the support unit 3011 according to the measurement result of the pressure sensor 3012, thereby adjusting the pressure received by different parts of the entire user's body located on the specific side. The control device 302 can analyze the two-dimensional pressure distribution and use it to infer the user's body posture, and then calibrate the position of one or more bony protrusions of the user's body on this specific side. When the probability of pressure damage at at least one bony protrusion is unacceptable, the control device 302 cyclically adjusts at least one supporting force generated by at least one supporting unit until the probability of pressure damage at one or more bony protrusions where the user's body and the supporting device contact each other is acceptable.

The control device 302 of the present invention can interact with the support device 301 through the interface module 3013, such as receiving measurement data from the pressure sensor 3012 and controlling the support unit 3011 to adjust the support force applied to different parts of the user's body. The control device 302 can be any electronic device with a built-in application (App) for interacting with the support device 301, such as a smart phone, tablet, laptop, desktop computer, etc., and the interface module 3013 can be any wired or wireless communication module, such as a cable, Bluetooth module, Wi-Fi module, infrared module, and wireless communication module. Moreover, the support device 301 and the control device 302 can be two separate hardwares or two integrated hardwares. For example, one control device 302 corresponds to a plurality of support devices 301 to simplify the work of taking care of multiple devices at the same time.

The support device proposed in the present invention for redistributing body pressure has the following commonly used options. Since the present invention is aimed at adjusting the pressure on the bony protrusions of the human body to reduce and eliminate the probability of pressure damage at the bony protrusions, and as shown in the above FIG. 1B, the area of any bony protrusion of the human body is often not much different from the size of a coin. Therefore, in order to accurately locate the position of each bony prominence on the support device 301, the distance between adjacent pressure sensors 3012 often cannot be several integer multiples of the coin size. Some test results show that the distance between adjacent pressure sensors can be kept less than three centimeters, such as the distance between the edges is less than three centimeters, or the distance between the centers is less than three centimeters. The support unit 3011 can adjust the airbags that generate the support force by adjusting the degree of inflation. Considering the size of the airbags and the pressure sensors 3012, the distribution density of these pressure sensors 3012 is usually higher than the distribution density of these support units 3011. It is also possible to use a plurality of airbags that are smaller in size and more densely arranged as the support unit 3011. In addition, in order to effectively measure the degree of contact (expressed by the pressure) between different parts of the user's body and different parts of the specific side of the support device 301 when the user contacts the support device 301, since the user's body posture at the specific side of the support device 301 can change at any time, the pressure sensors 3012 are often arranged in a two-dimensional array (a first two-dimensional array), and the support units 3011 are usually arranged in another two-dimensional array (a second two-dimensional array), so as to fully and accurately measure the different pressures caused by different parts of the user's body at the specific side of the support device 301.

In addition, each support unit 3011 can change the support force it generates to change the different pressures it causes to different parts of the user's body, and because the human body contour is not like a rectangular parallelepiped with only straight edges, when the user's body is supported by a plurality of support units 3011, different support units 3011 that contact different parts of the user's body 309 often have different adjustable contours to properly support the user's body and adjust the support force applied to the user's body. That is, the support unit 3011 can adjust its vertical height, softness or even its horizontal size, and by changing the amount or flow rate of fluid such as gas or liquid flowing through the inside, the support unit 3011 can change the support force it generates and/or the size contour. Since the support device 301 is used to reduce the damage to the user's body caused by excessive and/or prolonged pressure, the support units 3011 will generate their own support forces (whether the same or different) before the user is located on this specific side. Before the user's body is supported by the support device 301, most of the air bags of these support units 3011 have been inflated to different heights to properly support the user's body and reduce the user's discomfort. In addition, the surface of this specific side is covered with a soft or deformable material to reduce the pressure on the user's body when the user's body contacts this specific side.

The control device 302 may have a built-in artificial intelligence for processing information from the pressure sensor 3012 and adjusting the support force generated by the support unit 3011. The control device 302 may use artificial intelligence to execute the method for improving compressive injuries proposed by the present invention, thereby using various databases, various reference information, and tests that have been performed one by one to continuously optimize the artificial intelligence and improve compressive injuries more and more accurately. The control device 302 can use artificial intelligence to analyze the two-dimensional pressure distribution measured by these pressure sensors 3012 and calculate the body posture of the user on the support device 301. It can also use artificial intelligence to calibrate the position of one or more bony protrusions of the body on a specific side of the support device 301 according to the user's body posture. The control device can use artificial intelligence to determine the probability of compressive injury at each bony protrusion. When the probability of compressive injury at at least one bony protrusion is unacceptable, such as when it is greater than a critical probability value common to all bony protrusions or when it is greater than the critical probability value of each bony protrusion, the control device can cyclically adjust the support force generated by at least one support unit 3011 until the probability of compressive injury at all bony protrusions is acceptable. Alternatively, the artificial intelligence can be trained by referring to the relationship between the body posture and the position of one or more bony protrusions obtained by other means, or by referring to the improvement results of adjusting one or more support units on compressive injury.

As shown in FIG4 , the present invention provides a basic flow chart of a system for redistributing body pressure distribution using a support device: First, as shown in step block 410, a support device is provided, the support device has a plurality of support units and a plurality of pressure sensors, the support units can generate their own support forces respectively and are arranged in a first two-dimensional array, and the pressure sensors are located between the support units and a specific side of the support device and are arranged in a second two-dimensional array. Second, as shown in step block 420, when the user is supported by the specific side, the pressure sensor measures and generates a two-dimensional pressure distribution. Next, as shown in step 430, the two-dimensional pressure distribution is analyzed to infer the user's body posture. Then, as shown in step 440, the user's body posture is analyzed to mark the position of one or more bony protuberances of the user's body on the support device. Finally, as shown in step block 450, determine whether the probability of occurrence of compressive injuries corresponding to all bony protrusions is acceptable, for example, lower than the common critical probability value of all bony protrusions or lower than the respective critical probability value of each bony protrusion. If so, stop adjusting the support force generated by these support units. If not, cyclically adjust the support force generated by one or more support units until the probability of occurrence of compressive injuries corresponding to all bony protrusions is acceptable. In other words, when the user is supported by the support device, a two-dimensional pressure distribution between the user's body and the specific side of the support device is measured, and then the two-dimensional pressure distribution is analyzed to find one or more bony prominences that the user's body directly contacts with the specific side of the support device (especially the respective positions of each bony prominence on the specific side of the support device), and finally the different support forces applied by the support device to different parts of the user's body are adjusted until the pressure of each bony prominence that the user's body directly contacts with the specific side of the support device is reduced to an acceptable range.

Obviously, the mainstream commercial practice is to directly reduce the pressure on the parts of the user's body that are under greater pressure. The specific content of step block 410 and step block 420 of the present invention is to calibrate the position of one or more bony protrusions between the user's body and the support device from the pressure distribution of various parts of the user's body, so it is necessary to obtain a two-dimensional pressure distribution corresponding to the supporting force applied to the user's body by a specific side of the support device. Moreover, the commercial method directly adjusts the pressure on certain parts, while the present invention needs to process the two-dimensional pressure distribution as shown in step 430 to step 450 to obtain the overall location of the bony prominences, and at the same time make relevant adjustments to reduce the probability of pressure damage to these bony prominences.

In step block 430, there are two options for analyzing the two-dimensional pressure distribution to infer the user's body posture: Option 1 is to analyze the two-dimensional pressure distribution and infer the user's body posture with reference to the user's physiological information. Since the force on the bony protrusion is usually not the maximum force on the user's body, the two-dimensional pressure distribution can only display the pressure at each position on a specific side of the support device, and cannot directly display the position of each bony protrusion. Therefore, it is necessary to correspond to the two-dimensional pressure distribution of the user's body according to the specific details of the user's body, and to infer the user's body posture on the support device, such as lying, lying down, sitting, lying straight, lying on the side, lying prone, limbs spread out, hands on the chest, legs straight, hands under the head, sitting with legs crossed, kneeling, four limbs on the ground, lying posture, prone posture, lying on the side, hands and feet crossed posture. For example, according to whether the user has prostheses or assistive devices and their size and contour, the part of the two-dimensional pressure distribution corresponding to prostheses and assistive devices can be excluded, so part of the two-dimensional pressure distribution will not correspond to any bony protrusions of the user's body. The possibility of treatment that needs to be considered can also be reduced in the process of analyzing which body posture the two-dimensional pressure distribution may correspond to based on the user's disability, such as limb disability. If the user is missing an arm and does not have a prosthesis, there is no need to consider the body posture in which both hands touch the specific side of the support device. Furthermore, the body posture corresponding to the two-dimensional pressure distribution can be analyzed based on the user's body shape and the user's disease condition, such as whether the user is fat in the waist, abdomen, thighs, buttocks or limbs, or whether the user has edema, sarcoma, fracture, bone bending or joint stiffness and the degree of the disease, so as to more efficiently locate the parts of these bones in the two-dimensional pressure distribution that correspond to the body posture.

On the other hand, the user's height, limb length and weight are all basic physiological information of the user, which can be used to determine that the parts with higher pressure in the two-dimensional pressure distribution should correspond to the same user's body and exclude overweight or underweight signals that are unrelated to the user's body (at least unrelated to the user's bone position). In contrast, another option is to analyze the two-dimensional pressure distribution and infer the body posture by referring to a database model, in which the database model includes a plurality of two-dimensional pressure distributions generated by previous tests and a plurality of corresponding verified body postures. That is to say, by comparing with a large amount of data, you can find a certain previous two-dimensional pressure distribution that is closest to the current two-dimensional pressure distribution (or find some previous two-dimensional pressure distributions that are quite close), and then use the previous body posture corresponding to the previous two-dimensional pressure distribution (or when these previous two-dimensional pressure distributions all correspond to a certain previous body posture) or directly use it as the current body posture or as a starting point for inferring the current body posture. Obviously, the former option can accurately deduce the user's body posture based on their personal conditions, while the latter option can quickly deduce their body posture.

In step 440, there are four common options for analyzing the user's body posture to calibrate the positions of one or more bony protrusions of the user's body on the support device. One is to first calibrate one or more body parts based on the body posture and the two-dimensional pressure distribution, and then calibrate the positions of one or more bony protrusions on the support device based on the user's physiological information. For example, first determine that the pressures in the two-dimensional pressure distribution are mostly those body parts corresponding to the body posture, and then determine the positions of one or more bony protrusions in each body part in each pressure-larger portion based on various information about the user's body. For example, when lying on your back, you first determine which part of the body pressure is greater, the head, shoulders, buttocks, or limb joints. Then, based on the general human structure that the occipital bone is located approximately in the middle of the head when lying on your back, you can determine the specific location of the support device for the user's occipital bone and other bony protrusions.

Another method is to first analyze the body posture to infer the position of the body's skeletal muscles on the support device, and then perform graphic calculations to calibrate the position of one or more bony prominences on the support device. That is, after obtaining the user's body posture, first determine the distribution of each bone and muscle in the user's body in this body posture based on the general human body structure or even the user's physiological information, and then convert the corresponding position on the support device based on the two-dimensional pressure distribution, and finally calibrate the position of each bony prominence on the support device from the position of the bone on the support device based on the general human body structure or the user's physiological information.

It is also possible to first introduce information about which bony prominences are prone to pressure injuries in different body postures based on one or more clinical research results, and then calibrate the position of one or more bony prominences on the support device based on the user's body posture and the two-dimensional pressure distribution. For example, thousands of experimental results show that pressure trauma is particularly prone to occur on the sciatic bone in a semi-recumbent position with an upper body tilt angle of 66 degrees. When the user's body posture is a semi-recumbent position with an upper body tilt angle of 66 degrees, the position of the user's sciatic bone on the support device is calibrated only from the two-dimensional pressure distribution and the user's body posture.

Another option is to first convert the user's three-dimensional body structure into a two-dimensional projection on the plane where these pressure sensors are located based on the user's body posture and the user's physiological information, and then compare it with the two-dimensional pressure distribution to calibrate the position of one or more bony protrusions in this support device. For example, first determine how the user's body with such a posture will be distributed in three-dimensional space based on the specific details of the user's body, and then project it onto the support device to obtain a two-dimensional projection parallel to the plane where these pressure sensors are located. Then find three reference points in the skeletal part of the two-dimensional projection and calibrate their coordinates (because three points form a plane), and then connect these reference points to generate a reference plane and a reference line, and gradually convert the coordinates of each bone protrusion that directly contacts the support device in this body posture relative to these three reference points, and obtain the coordinates of each bone protrusion on the support device.

In step 450, how to adjust one or more support forces generated by all support units according to the probability of occurrence of pressure damage at each bony prominence to reduce or eliminate the pressure damage at all bony prominences has two options: one is to first compare with one or more medical models to determine the probability of occurrence of pressure damage at each bony prominence and generate pressure damage according to the occurrence mechanism. The pressure reduction strategy is based on the order of the magnitude of the pressure reduction rate, and then the one or more supporting forces generated by one or more supporting units and applied to different parts of the user's body are adjusted cyclically and separately until the probability of pressure damage corresponding to all bony protrusions is acceptable, for example, all are less than the common critical probability value of all bony protrusions or individually less than the critical probability value of these bony protrusions. That is, after finding the location of each bony prominence, the pressure on each bony prominence is found from the two-dimensional pressure distribution (or it can be regarded as the support force on a certain bony prominence divided by the area of this bony prominence), and then the probability of each bony prominence suffering from pressure damage under the influence of such pressure size and contour shape and other factors is determined based on the results of previous medical research. Then, according to the order of the probability of pressure damage, starting from the bony prominence that is most likely to suffer pressure damage, the probability of pressure damage is gradually reduced until the probability of pressure damage on all bony prominences is acceptable.

Another option is to adjust the support force generated by one or more support units after finding one or more bony protrusions. If the probability of pressure injury corresponding to all bony protrusions cannot be made acceptable, such as being less than a critical probability value common to all bony protrusions or individually less than the critical probability values of these bony protrusions, then adjust one or more support forces generated by one or more support units and applied to different parts of the user's body again until the probability of pressure injury corresponding to all bony protrusions is acceptable. In other words, trial and error can also be used, such as using the computing power of a computer or mobile device to quickly analyze and test a large number of possible configurations of various support units applying various support forces to different parts of the user's body, until a configuration of support units is found that can make the probability of pressure damage to all bony prominences acceptable.

In step 450, one or more support forces generated by all support units are adjusted according to the probability of occurrence of compressive damage at each bony prominence to reduce or eliminate the compressive damage at all bony prominences. There are four options: the first option is to first find a specific bony prominence among one or more bony prominences whose position corresponds to the highest probability of occurrence of compressive damage, and then adjust the support forces generated by all support units according to the probability of occurrence of compressive damage at each bony prominence. The support force generated by the entire one or more support units is increased until the probability of pressure injury corresponding to a specific bone protrusion is less than the critical probability value, and then the process is cycled in order of the corresponding probability of pressure injury at other one or more bone protrusions that have not been treated, until the probability of pressure injury corresponding to all bone protrusions is less than the critical probability value. That is, the risk of pressure injury at each bony prominence is judged based on whether it is greater than the critical probability value, and whether the support force applied by the support unit has been adjusted to an acceptable standard. The treatment starts from the bony prominence with the highest risk, and the probability of pressure injury at each bony prominence is gradually reduced until it is lower than the acceptable critical probability value.

Option 2: When there are M bony prominences whose relative probability of occurrence of compressive injury is greater than zero, only the N bony prominences whose relative probability of occurrence of compressive injury is relatively large are targeted, and the pressure generated by one or more support units is adjusted to make the relative probability of occurrence of compressive injury at these N bony prominences not greater than this critical probability value, where M and N are both positive integers and M is greater than N. This is because some completed tests have found that in various human postures, the probability of compression injury is higher or the severity is more severe at certain bony prominences. Although other bony prominences may also suffer from compression injury, the probability and severity of occurrence are significantly lower. Therefore, when adjusting, as long as the bony prominences with greater compression injury are adjusted, the probability of compression injury at other bony prominences that are not adjusted can basically be reduced to no more than this critical probability value.

Option 3: When there are M bony prominences whose relative probability of occurrence of compressive injury is greater than zero, the pressure reduction strategy for adjusting the pressure generated by one or more support units is to reduce the pressure of a bony prominence whose relative probability of occurrence of compressive injury is the largest by _X1 %, reduce the pressure of a bony prominence whose relative probability of occurrence of compressive injury is the second largest by _X2 %, and so on until the pressure of a bony prominence whose relative probability of occurrence of compressive injury is the lowest is reduced by _XM %, wherein _X1 , _X2 , and until _XM are all greater than zero and _X1 is greater than or equal to _X2 , _X2 is greater than or equal to _X3 , and so on until _XM-1 is greater than or equal to _XM .

Option 4: When there are M bony prominences whose relative probability of occurrence of compressive injury is greater than this critical probability value, the pressure reduction strategy for adjusting the pressure generated by one or more support units is to reduce the pressure of a bony prominence with the highest relative probability of occurrence of compressive injury by _X1 %, reduce the pressure of a bony prominence with the second highest relative probability of occurrence of compressive injury by _X2 %, and so on until the pressure of a bony prominence with the Nth highest relative probability of occurrence of compressive injury is reduced by _Xn %, and no pressure reduction is set for other bony prominences with lower relative probability of occurrence of compressive injury. In this _X1 , _X2 , until X _N is greater than zero and _X1 is greater than or equal to _X2 , _X2 is greater than or equal to _X3 , and so on until _XN-1 is greater than or equal to _XN , where M and N are both positive integers and N is greater than N. Here, these two options are further changes of the previous options, simplifying the repeated testing of various possible configurations of these support units, but directly reducing the pressure on each of these bone protrusions in proportion to the probability of pressure damage occurring at multiple bone protrusions. The greater the probability of pressure damage occurring, the more the pressure is reduced, so that the probability of pressure damage occurring at each bone protrusion can be reduced by adjusting the pressure it is subjected to. Of course, this adjustment method is also based on the empirical rules obtained from many previously completed tests, and each variable M, N, _X1 , _{X2..XN..XM is} an adjustable _variable .

In existing commercial products, only the pressure at the place with greater pressure is reduced (or the support force generated by the corresponding support unit is reduced), but in the present invention, in order to reduce the probability of pressure injury at a certain bony protrusion without excessively increasing the probability of pressure injury at other bony protrusions, the support force generated by one or more support units is adjusted at the same time (or the pressure at one or more parts of the user's body is adjusted at the same time), so that the probability of pressure injury at one or more bony protrusions can be kept lower than a common critical probability value or the critical probability value of each bony protrusion. That is, even if the probability of pressure injury at only one and a single bony prominence is greater than the acceptable critical probability value, it is not necessary to adjust only the support force applied by one or more support units closest to the bony prominence, but it is still possible to adjust the support force applied by one or more support units farther away from the bony prominence. After all, under the premise that the user's body weight remains unchanged (even under the premise that the total weight of the user's clothes remains unchanged), the redistribution of the different support forces applied by each support unit must be considered to avoid the situation where the pressure on a certain bony prominence is reduced to an acceptable level while the pressure on another bony prominence is increased to an unacceptable level.

In addition, in step 450, the support units may be adjusted to the expected configuration by computer simulation, or the configuration values of the support units may be adjusted continuously to obtain the desired configuration of the support units. In the spirit of the present invention, both methods are acceptable. In particular, many previous tests have found that in general medical applications, it is often only necessary to adjust less than five times to obtain the configuration of the support force that each support unit should apply so that the probability of pressure damage to all bony prominences is acceptable. Therefore, the final desired result can be achieved quickly by computer simulation or actual adjustment, and no significant side effects will be caused to the user's body during the process. That is, one option is to first use computer simulation to obtain a specific adjustment of the two-dimensional support force distribution that can make the probability of pressure damage corresponding to all bony prominences less than this critical probability value, and then actually adjust the support force generated by one or more support units based on this specific adjustment of the two-dimensional support force distribution, and the other option is to use a computer simulation to obtain a specific adjustment of the two-dimensional support force distribution. Obtaining a specific adjusted two-dimensional support force distribution that can make the probability of pressure damage corresponding to all bony prominences less than this critical probability value is actually adjusting the support force generated by these support units. Therefore, when obtaining this specific adjusted two-dimensional support force distribution, the support force generated by these support units has been adjusted.

The method of redistributing body pressure distribution of the support device of the present invention can also use artificial intelligence to execute step 430, step 440 and/or step 450. For example, an artificial intelligence is used to analyze the two-dimensional pressure distribution to infer the body posture of the user, and the artificial intelligence is trained by comparing the obtained two-dimensional pressure distribution and the user's body posture with the two-dimensional pressure distribution and the user's body posture obtained by other methods. Or an artificial intelligence is used to analyze the body posture to mark the position of one or more bony protuberances of the user's body on the support device, and the artificial intelligence is trained by comparing the obtained one or more bony protuberance positions with the one or more bony protuberance positions obtained by other methods. For example, an artificial intelligence is used to determine whether the probability of occurrence of pressure injuries corresponding to all bony prominences is no greater than a critical probability value, and to determine how to adjust the support force generated by one or more support units so that the probability of occurrence of pressure injuries corresponding to all bony prominences is no greater than the critical probability value, and the artificial intelligence is trained through the improvement of pressure injuries caused by adjusting one or more support units.

The artificial intelligence used can be further adjusted and optimized by using artificial intelligence to execute any of the step blocks and compare the results obtained by artificial intelligence with the results obtained by other methods; or by using artificial intelligence to execute these three step blocks and compare the pressure injury probability obtained by artificial intelligence with the pressure injury probability when no adjustment is made. For example, when the correspondence between various human body shapes and various dangerous bone prominences is classified into several groups of correspondences after accumulating a large number of cases, the human body shapes obtained through artificial intelligence processing can be directly compared with these accumulated cases to obtain the possible dangerous bone prominences. Such correspondences can also be fed back and corrected by comparing the human body shapes and the possible dangerous bone prominences marked by artificial intelligence.

As described above, the embodiment of the present invention provides a method for redistributing body pressure distribution by a support device, comprising the following steps: first, providing a support device to support a lying human body, the support device having a plurality of support units and a plurality of pressure sensing units, the plurality of pressure sensors being located between the plurality of support units and a lying human body, and the plurality of pressure sensors being used to continuously monitor during the adjustment process, the plurality of support units being mutually arranged into one or more groups of two-dimensional arrays, Different supporting units can generate their own supporting forces respectively, and a plurality of pressure sensors are arranged to form one or more two-dimensional arrays, wherein the initial internal uniform pressure of the plurality of supporting units is a specific saturated internal air pressure. This specific saturated internal air pressure can be measured using a specific value of a Schoehl hardness tester as a reference, and the two-dimensional here refers to the X and Y axis directions formed by the distribution plane of the supporting units. The distribution density of these pressure sensors is higher than the distribution density of these supporting units. In addition, the pressure sensors are arranged in a two-dimensional array, the support units are arranged in a two-dimensional array, and the distance between the edges of at least two pressure sensors is less than three centimeters, and the distance between the centers of at least two pressure sensors is less than three centimeters, and at least one support unit can adjust at least one of the following: horizontal size, vertical size and hardness, wherein at least one support unit can change the support force generated by changing the fluid inside it, and at least one support unit can change its size profile by changing the fluid inside it.

When the human body surface contacts and exerts pressure on the surface of a specific side of the support device, a plurality of the pressure sensors perform a pressure distribution measurement step to scan the lying human body pressure image, measure the pressure of the lying human body on the support device, and generate a two-dimensional pressure distribution, wherein the above-mentioned two-dimensional pressure distribution refers to the vertical pressure caused by the body force at the two-dimensional coordinate position on the position perpendicular to the plane. Then, the two-dimensional pressure distribution is interpreted and analyzed to generate at least one characteristic parameter, wherein the characteristic parameter further includes boundary shape, number and arrangement of regional centroids, local peak point of pressure, size configuration of the connection line between centroid and peak value, estimated configuration ratio, and the body condition parameter further includes three measurements, height, weight, and special factors. Then, a lying posture comparison step is performed according to the characteristic parameter and a body shape factor to compare and identify a lying posture, wherein the body shape factor includes height, weight, waist circumference, limb defects, etc., and the body shape factor can also be obtained from a clinical data database, and the lying posture comparison step is an artificial intelligence comparison learning to infer the user's lying posture in that situation, and divide it into various categories such as lying on the back, lying on the left side, lying on the right side, sleeping on the stomach, and whether the hands and feet are crossed, and all steps can be compared, judged, analyzed and automatically controlled by artificial intelligence machine learning and big data. Afterwards, a bony protuberance coordinate calibration step is performed according to the lying posture and the characteristic parameter to identify the two-dimensional coordinate position of the important skeletal muscles lying on the mattress, and to calibrate at least one bony protuberance of the lying person's body and a bony protuberance coordinate where the bony protuberance presses on the support device. Secondly, a compressive injury probability judgment step is performed to detect a local peak pressure corresponding to the bony protuberance coordinate, and at the same time judge the probability of compressive injury of at least one of the bony protuberances, and generate a risk for each of the bony protuberances, wherein a higher risk indicates a higher local peak pressure of the bony protuberance, which means a higher probability of compressive injury. The above-mentioned pressure injury probability judgment step is to judge whether the size of the support pressure is likely to cause pressure injury by using the patient type in a clinical research database, and after calculating the probability of pressure injury of multiple bone prominences, the risk of pressure injury of multiple bone prominences is generated respectively, and the risk is ranked accordingly.

Then, a risk ranking step is performed according to the risk to generate a risk ranking for the probability of occurrence of compressive damage to at least one of the bony prominences, and according to the risk ranking, the support force allocated to at least one of the bony prominence coordinates is recalculated and a redistribution model parameter is generated to facilitate the redistribution of the support force required by all the support units of the two-dimensional array of the plurality of groups at the same time. Afterwards, a pressure configuration is generated by the redistribution model parameters to perform a redistribution process of the integrated pressure distribution, and the individual shapes and hardness of the support unit located at the high-risk area of the pressure injury are adjusted according to the pressure configuration, wherein the pressure configuration includes the pressure data required to be adjusted for all the support units located at the bony prominences with the risk, and the support pressure borne by the support unit when the human body lies on the support device is redistributed accordingly, and the local peak pressure corresponding to the high-risk area of the pressure injury is reduced.

In addition, before performing the redistribution process of the body pressure distribution, a pressure reduction process is first performed according to a pressure reduction percentage and/or a pressure reduction value to reduce the specific saturated internal air pressure, wherein the redistribution model parameter further includes the pressure reduction percentage and/or the pressure reduction value, and the pressure reduction percentage is 5%~35% of the original saturated internal air pressure, and preferably 15%~25% of the saturated internal air pressure, wherein the pressure reduction percentage is the pressure reduction ratio to the previous saturated internal air pressure. Finally, the pressure distribution measurement step is repeated to generate an updated two-dimensional pressure distribution, and the above steps are repeated according to the updated two-dimensional pressure distribution. If the two-dimensional pressure distribution shows that the local peak pressure corresponding to the high-risk area of pressure injury fails to make the probability of pressure injury of each bone prominence lower than a predetermined critical probability value, a cyclic scanning is required. The lying pressure image of the human body is drawn and the redistribution model parameters are adjusted in batches by the updated two-dimensional pressure distribution until the two-dimensional pressure distribution shows that the probability of pressure injury at each bony prominence is lower than the critical probability value. If it is not lower than the critical probability value, the risk reduction step is repeated until the risk is reduced to the critical probability value.

The pressure distribution adjustment method of the present invention is completely different from the single airbag adjustment method currently used in the market. The method and system for redistributing body pressure distribution of the support device proposed by the present invention is to find the optimized overall pressure distribution image diagram and adjust the corresponding overall airbag pressure composition method accordingly, rather than finding a single pressure point and adjusting a single airbag technology. The support device redistribution body pressure distribution system proposed by the present invention is aimed at reducing the airbag surface pressure at the vulnerable part of the body surface, rather than the internal pressure of the airbag. Adjusting the internal pressure of the airbag is only to change the distribution method of the support force, so that the surface pressure at the most coordinate positions can be adjusted with the minimum number of airbags. As shown in Figure 5A, lowering the pressure of the P4 airbag will increase the pressure of the P3 and P5 airbags. In addition, the internal pressure of each airbag will affect the hardness, height and shape of each area of the mattress. Therefore, the combination of several airbags with different internal pressure will cause different body support pressure distribution images (outside the airbags) on the body pressure distribution of the person lying down. Some areas will have more pressure and some areas will have less pressure, because the total body weight remains unchanged. The present invention can correspond to different pressure distribution images outside the airbag according to various different pressure distribution methods inside the airbag to find the optimal overall pressure distribution method to avoid pressure sores. As shown in Figure 5B, the present invention will continuously activate the airbag and scan the overall pressure image at the same time (initial pressure distribution image on the far left), and then synchronously calculate and feedback control to continuously optimize the surface pressure, and finally obtain the optimized pressure distribution image (such as the pressure distribution image on the far right).

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Claims (10)

A method for redistributing body pressure using a support device, comprising: A support device is provided to support a lying human body. The support device has a plurality of support units and a plurality of pressure sensing units. The plurality of pressure sensing units are located between the plurality of support units and a lying human body, and the plurality of pressure sensing units are used to continuously monitor during the adjustment process. The plurality of support units are arranged mutually into one group or a plurality of groups. A two-dimensional array, and different supporting units can generate their own supporting forces respectively, and a plurality of pressure sensors are arranged to form one or more groups of two-dimensional arrays, wherein the initial internal uniform pressure of the plurality of supporting units is a specific saturated internal air pressure, and the two-dimensional here refers to the X and Y axis directions formed by the plane where the supporting units are distributed; When the human body surface contacts and exerts pressure on the surface of a specific side of the support device, a plurality of the pressure sensors perform a pressure distribution measurement step to scan the lying human body pressure image, measure the pressure of the lying human body on the support device, and generate a two-dimensional pressure distribution, wherein the above-mentioned two-dimensional pressure distribution refers to the vertical pressure magnitude caused by the body force at the two-dimensional coordinate position on the position perpendicular to the plane; Interpret and analyze the two-dimensional pressure distribution and generate at least one characteristic parameter; A lying posture comparison step is performed based on the characteristic parameter and a body shape factor to compare and identify a lying posture; According to the lying posture and the characteristic parameter, a bone protrusion coordinate calibration step is performed to identify the two-dimensional coordinate position of important skeletal muscles lying on the mattress, and at least one bone protrusion of the body of the lying person and a bone protrusion coordinate where the bone protrusion presses on the support device are calibrated; A compressive injury probability determination step is performed to detect a local peak pressure corresponding to the bone protrusion coordinates, and at the same time determine the probability of compressive injury of at least one of the bone protrusions, and generate a risk for each of the bone protrusions, wherein a higher risk indicates a higher local peak pressure of the bone protrusion, which means a higher probability of compressive injury; A risk ranking step is performed according to the risk to generate a risk ranking for the probability of occurrence of compressive damage to at least one of the bony prominences, and according to the risk ranking, the support force of at least one of the bony prominence coordinates is recalculated and allocated, and a redistribution model parameter is generated to facilitate the redistribution of the support force required by all the support units of the two-dimensional array of the plurality of groups at the same time; and A pressure configuration is generated by the redistribution model parameters to perform a pressure redistribution process, and the individual shape and hardness of the support unit located at the high-risk area of the pressure injury are adjusted according to the pressure configuration. As described in claim 1, the above-mentioned body shape factors include height, weight, waist circumference, limb defects, etc., and the body shape factors can also be obtained from a clinical data database. As described in claim 1, the above-mentioned lying posture comparison step is an artificial intelligence comparison learning to infer the user's lying posture in that situation, and classify it into various categories such as lying on the back, lying on the left side, lying on the right side, sleeping on the stomach, and whether the hands and feet are crossed, and all steps can be compared, judged, analyzed and automatically controlled by artificial intelligence machine learning and big data. The method as described in claim 1 further includes performing a pressure reduction process to reduce the specific saturated internal air pressure according to a pressure reduction percentage and/or a pressure reduction value before performing the body pressure distribution redistribution process, wherein the redistribution model parameter further includes the pressure reduction percentage and/or the pressure reduction value, wherein the pressure reduction percentage is a pressure reduction ratio to the previous saturated internal air pressure. The method as described in claim 4, wherein the above-mentioned pressure reduction percentage is 5%~35% of the original saturated internal air pressure, wherein the pressure reduction percentage is preferably 15%~25% of the original saturated internal air pressure. The method as described in claim 1 further comprises repeating the pressure distribution measurement step and generating an updated two-dimensional pressure distribution, and repeating the above steps according to the updated two-dimensional pressure distribution, if the two-dimensional pressure distribution shows that the local peak pressure corresponding to the high-risk area of pressure injury fails to make the probability of pressure injury of each bone prominence lower than a predetermined critical probability value , the lying human body pressure image must be scanned cyclically and the redistribution model parameters must be adjusted in batches by the updated two-dimensional pressure distribution until the two-dimensional pressure distribution shows that the probability of pressure injury at each bony prominence is lower than the critical probability value. If it is not lower than the critical probability value, the risk reduction step is repeated until the risk is reduced to the critical probability value. The method as described in claim 1 further includes at least one of the following: the distribution density of the pressure sensor is higher than the distribution density of the support units. The method as described in claim 1 further includes at least one of the following: the distance between the edges of at least two pressure sensors is less than three centimeters, and the distance between the centers of at least two pressure sensors is less than three centimeters. The method as described in claim 1, wherein the support unit can adjust at least one of the following: horizontal dimension, vertical dimension and hardness, and the support unit can change the support force and size profile generated by changing the fluid inside it. The method as described in claim 1, wherein the air pressure configuration includes the air pressure data required to be adjusted for all the support units located at the bony prominences with the risk, and accordingly the support pressure borne by the support unit when the human body lies on the support device is redistributed, and the local peak pressure corresponding to the high-risk area of the pressure injury is reduced.

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