JPH10276971A - Liquid feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid feeding device capable of maintaining a liquid at a constant temperature by quickly adjusting the temperature of a liquid fed to an organism even if the flow rate of a liquid changes. SOLUTION: In a liquid feeding device in which a liquid is fed into an organism through a liquid feeding tube 4 connected to a bag 1, the liquid feeding device receives a signal of a temperature measuring element 16, adjusts the quantity of heat generated by an electrothermal heater 11, and maintains the liquid at a constant temperature. When the flow rate of a liquid fed by the liquid feeding tube 4 increases, the liquid feeding device receives a changed signal and adjusts the quantity of heat generated by the electrothermal heater 11 so that it increases the quantity of heat. When the flow rate of a liquid fed increases, the electrothermal heater 11 is controlled to quickly increase the quantity of heat to be generated so as to control the temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid feeding device having a heating function for feeding a liquid such as physiological saline to a living body.

[0002]

2. Description of the Related Art In general, when observing or treating the inside of a patient's body cavity with an endoscope, if a treatment site cannot be clearly observed due to bleeding or body fluid, a transparent liquid such as saline is injected into the body cavity. It is sent to clean the inside of the body cavity. Also, when performing prostatectomy or endoscopic surgery in the uterus or in a joint under endoscopic observation, liquid is fed into the surgical site. In addition, liquid may be injected into the living body to expand the living body to secure a cavity necessary for the operation.

[0003] In many cases, a liquid is sent into a living body as described above. Conventionally, however, this type of liquid sending apparatus loads a deformable bag-shaped storage container containing a liquid into a pressurizing device, The liquid in the storage container is pressurized by pressing and crushing the storage container, and the liquid is sent into the living body through the liquid sending tube.

[0004] However, when a liquid is sent into a living body of a patient,
If the temperature of the liquid is different from the patient's body temperature, the patient's body temperature may drop, causing a hypothermic symptom. For this reason, the storage container is heated by a heater, and a pre-warmed liquid is sent.

[0005]

As described above, in the conventional liquid feeding apparatus, the temperature of the liquid to be sent is previously warmed in the storage container in accordance with the patient's body temperature, and the preheated liquid is supplied. Like that. However, in practice, it is rare that liquid is always sent at a constant flow rate. When there is no need for cleaning, the liquid is not sent at all, and in the case of washing, the interval and flow rate of the liquid are often changed according to the situation. Also, considering that liquid is sent into the living body through a considerably long liquid sending tube derived from the storage container in the liquid sending device main body, the amount of cooling received by radiating heat to the outside during the liquid sending is considered. Large, and the cooling amount is easy to fluctuate greatly,
At the stage of injection into the living body, the temperature of the liquid to be sent into the living body changes considerably.

On the other hand, a system may be considered in which a heating means is incorporated in the middle of the liquid feeding tube to heat the liquid just before the liquid is sent to the living body. However, this may also cause the following problems. As described above, in this type of liquid sending device, the amount of liquid sent is not always constant, but rather, the flow rate of the liquid is changed or the liquid is sent intermittently. For this reason, even if heating is performed in the middle of a liquid feeding tube immediately before liquid feeding to a living body, it is actually difficult to supply at an appropriate temperature. For example, when the amount of liquid sent through the liquid sending tube changes, the actual temperature when the liquid is heated in the middle of the liquid sending tube also changes. That is, if the amount of liquid supplied increases, the heating capacity of the heating means becomes insufficient, and the liquid to be supplied becomes too low in temperature. Further, when the liquid sending amount is reduced, the heating capacity of the heating means becomes excessive, and the liquid to be sent becomes too high. As described above, conventionally, when the amount of liquid to be delivered to a living body changes, the temperature of the liquid to be delivered to the living body easily deviates from an appropriate temperature. I couldn't.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problem. It is an object of the present invention to keep the temperature of a liquid to be delivered to a living body at an appropriate constant temperature even when the amount of the delivered liquid changes rapidly. Accordingly, it is an object of the present invention to provide a liquid feeding device that can maintain a low temperature and does not cause a patient to have a bad symptom such as a decrease in body temperature.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a liquid feeding apparatus for feeding a liquid into a living body through a liquid feeding pipe member connected to a container filled with a liquid. A liquid sending means for sending a liquid into the body, a temperature measuring means for measuring a temperature of the liquid to be sent, and a heat amount for heating the liquid and heating the liquid in at least one of the container and the pipe member. Adjustable heating means, and a liquid sending signal generating means for generating a signal of a value related to a liquid sending amount for sending the liquid into the living body from the container through the pipe member, and further comprising the temperature measuring means In addition to the first control means for receiving the signal, adjusting the amount of heat generated by the heating means according to the temperature of the liquid to be sent, and adjusting the temperature of the liquid to be sent to an appropriate constant value, The signal from the liquid sending signal generation means When the flow rate of the liquid to be supplied is increased, second control means for adjusting the heating means so as to increase the amount of heat generated by the heating means is provided, and the flow rate of the liquid to be supplied is increased. At this time, the amount of heat generated by the heating means is instantaneously increased to perform temperature adjustment. Therefore, the temperature of the liquid sent to the living body following the liquid sending amount can always be maintained at an appropriate constant temperature.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] A first embodiment of the present invention will be described with reference to FIGS. (Structure) FIG. 1 shows a schematic structure of a liquid feeding device. FIG. 1
In the figure, reference numeral 1 denotes a cuff bag (container) loaded in a holder device 2 described later, in which sterilized physiological saline as a liquid such as an aqueous solution is sealed. The holder device 2 is suspended from an arm of the container stand 3. A long liquid feeding tube 4 made of a flexible resin is connected to the bag 1. The liquid sending tube 4 is a conduit member for sending the liquid sealed in the container into the living body. The liquid sending tube 4 passes through a roller pump 6 in the liquid sending device main body 5,
A living body insertion device 7 to be inserted into a living body is connected to the extension end. Then, the liquid feeding tube 4 is connected to the living body insertion device 7
A liquid-feeding pipeline for sending liquid to the bag 1 is formed, and by driving the roller pump 6, the physiological saline stored in the bag 1 is fed into the living body insertion device 7.

An electromagnetic valve 8 which is opened at the time of feeding a liquid to the living body insertion device 7 is provided on a grasping portion of the living body insertion device 7. A power supply line 9 is connected to the electromagnetic valve 8. Here, the electromagnetic valve 8 may be provided with a valve function and an operation knob for manually adjusting the opening and closing and the liquid supply amount as needed. The living body insertion device 7 may be inserted alone into the patient's body cavity 10 or may be inserted into the patient's body cavity 10 through another insertion aid such as a catheter or a trocar or an endoscope. A liquid feed passage may be formed inside the endoscope and the like, and the liquid feed tube 4 may be connected to the liquid feed passage.

On the other hand, the holder device 2 for holding the bag 1 is configured as shown in FIG. That is, the holder device 2 has the case member 31, and the back storage chamber 32 is formed in the case member 31. Since the bag 1 is formed of a flexible bag, when the bag 1 is put in the bag storage chamber 32, it is stored so as to fall under its own weight including the built-in liquid. The lower side of the back storage chamber 32 is slightly narrower and formed in a tapered shape. An opening window 34 extending up and down is formed in a front wall portion of the back storage room 32. Case member 3
A hanger 35 for hooking the container stand 3 is provided at the upper end on the back side of the container 1.

An outflow needle tube 36 connected to the liquid feed tube 4 is provided on the bottom wall of the case member 31. The outflow needle tube 36 is, as shown in FIG.
The mouth portion 3 provided on the bottom surface of the bag 1 while being loaded in the bag 1
8 into the stopper 39, the liquid sending tube 4 and the bag 1
Communication. As a result, the physiological saline in the bag 1 is sent out through the liquid feeding tube 4 by its own weight and the liquid feeding action of the roller pump 6.

FIG. 7 shows another example of the back holder 41. As shown in FIG. The back holder 41 includes a fixture body 42 that can be suspended substantially vertically on the container stand 3.
A container hook 43 is provided on the front upper portion of the fixture body 42, and the bag 1 is hung on the hook 43. A cover 44 that covers the bag 1 hung on the hook 43 is provided on the front surface of the fixture body 42. The upper end of the cover 44 is pivotally attached to the fixture main body 42 by a hinge 45, and the cover 44 has a ratchet claw 46 at its lower end. The ratchet claw 46 is engaged with a ratchet receiving tooth 47 formed at the lower end of the fixture main body 42. Stop and cover 44
Is locked in a closed state. Cover 44
Is provided with a pressing member 49 attached with a plurality of elastic biasing springs 48 interposed therebetween, and when the cover 44 is closed,
The back 1 is pressed against the fixture body 42 by the pressing member 49. In the same manner as described above, the liquid sending tube 4 is provided with an outflow needle tube 36 that pierces the stopper 39 of the mouth 38 of the bag 1.
Connected through.

FIG. 7 shows a state in which the cover 44 is closed and the back 1 is pressed by the pressing member 49 so as to be crushed. The cover 44 is automatically opened by the elasticity of the spring 48 by removing the ratchet pawl 46 from the ratchet receiving tooth 47. FIG. 8 shows a state in which the cover 44 is open. In addition, the holder device 2 or the holder 41 is provided with a heater (not shown) for heating the bag 1 loaded therein, and the physiological saline sealed in the bag 1 is preliminarily heated. It is desirable.

As shown in FIG. 1, a heater 11 for heating a liquid, for example, a physiological saline solution to be fed through the liquid sending tube 4 connected to the bag 1 is provided in the middle of the tube. The heater 11 is a heater power supply 1 described later.
5 is supplied with an electric current and driven to constitute a heating means for heating the physiological saline to be fed through the feeding tube 4. Further, the mounting position of the heater 11 is in the middle part of the liquid feeding tube 4 located ahead of the roller pump 6 of the liquid feeding device main body 5. The heater 11 is, as shown in FIG.
It is provided with a covering member 12 made of a heat insulating material in a cylindrical shape, and this covering member 12 may be formed by various methods such as forming a cut in the middle of the covering member 12 or wrapping the covering member 12 in a sheet shape around the liquid feeding tube 4. By adopting it, it can be detachably attached to the middle part of the liquid sending tube 4. Cover member 12
An electrothermal heater element 13 fitted on the outer periphery of the liquid feed tube 4 is provided on the inner surface of the liquid supply tube 4. Further, a temperature measuring element 16 for detecting the temperature of the liquid for sending the liquid into the living body through the liquid sending tube 4 is provided on the inner surface of the covered member 12.

The electrothermal heater element 13 is connected to a heater power cord 14, and the electrothermal heater element 13 is connected to the heater power source 15 installed in the liquid feeding device main body 5 through the heater power cord 14. The temperature measuring element 16 is made of, for example, a platinum resistor, a thermocouple, or the like, and is installed at a position located on the tip end side of the electrothermal heater element 13. Then, the temperature measuring element 16 measures the discharge temperature of the physiological saline heated by the electric heating element 13 and transmits the detection signal to a sensor control circuit 18 installed in the liquid feeding device main body 5 through a signal line 17. It is supposed to. The sensor control circuit 18 receives the signal detected by the temperature measuring element 16 and measures the discharge temperature of the physiological saline heated by the heater element 13. That is, these constitute a temperature measuring means for measuring the temperature of the liquid to be sent.

As shown in FIG. 1 and FIG.
In addition to the roller pump 6, the heater power supply 15 and the sensor control circuit 18 described above, a plurality of elements as described below are incorporated in the apparatus. First, a setting panel 2 provided with a liquid sending temperature setting button 21 and a liquid sending amount setting button 22 on the front surface of the apparatus body 5.
3 are provided. A roller pump 6 is provided in the apparatus main body 5.
Is provided with a roller pump control circuit 24 for controlling the driving of the roller pump. The roller pump control circuit 24 receives the liquid supply amount signal set by the liquid supply amount setting button 22 on the setting panel 23, and outputs a control signal for driving the roller pump 6 so as to achieve the set liquid supply amount. The start and stop of the roller pump 6 can be controlled by an operation switch, for example, a foot switch 25. That is, when the contact 25 a operated by the foot switch 25 is closed, the liquid supply amount signal is sent to the roller pump control circuit 24. Further, the power supply line 9 from the electromagnetic valve 8 in the living body insertion device 7 is connected to an electromagnetic valve power supply 30 installed in the apparatus main body 5 via a contact 25b operated by the foot switch 25, and the foot switch 25 When the contact 25b is closed, the electromagnetic valve 8 is opened so that liquid can be sent.

On the other hand, the heater power supply 15 of the heating means is controlled by a heater power control means described below. The heater power control means has an adding circuit 27 for outputting a heater control signal. The adding circuit 27 receives the output of the comparator circuit 28 and the output of the differentiating circuit 29, adds the outputs, and responds accordingly. And outputs a heater control signal. A temperature reference signal set on the setting panel 23 is input to a plus input terminal of the comparator circuit 28, and a sensor output signal from the sensor control circuit 18 is input to a minus input terminal of the comparator circuit 28.
Then, the comparator circuit 28 outputs a signal obtained by inverting the sensor output signal with reference to the temperature reference signal. That is, the first control for receiving the signal of the temperature measuring means, adjusting the amount of heat generated by the heating means according to the temperature of the liquid to be sent, and adjusting the temperature of the liquid to be sent to an appropriate constant value. Means. Further, the differentiating circuit 29 differentiates the roller pump control signal output from the roller pump control circuit 24 and outputs the differentiated signal, thereby detecting a change in the liquid supply amount and relating to the liquid supply amount. A liquid sending amount signal generating means for generating a value signal is configured. And the addition circuit 2
A second control 7 receives the signal of the differentiating circuit 29 and adjusts the heater power supply 15 of the heating means so as to increase the amount of heat generated by the heating means when the flow rate of the liquid to be sent increases. Means.

(Operation) A case will be described in which physiological saline is fed into the body cavity 10 of a patient using the above-mentioned liquid sending device.
First, the liquid feed tube 4 is connected to the bag 1 loaded in the holder device 2 suspended from the stand 3, and the roller pump 6 is mounted in the middle of the liquid feed tube 4. The living body insertion device 7 is connected to the distal end of the liquid feeding tube 4, and the heater 11 is attached to a part of the liquid feeding tube 4. Also, setting panel 2
The liquid sending temperature and the liquid sending amount are set by the setting buttons 21 and 22 in 3, respectively.

Here, since the bag 1 is mounted on the holder device 2 suspended on the stand 3 and is at a high position,
When the water head difference and the pressing member 49 are used, the bag 1 is pressed by the pressing member 49, so that the physiological saline is preliminarily acted to be fed into the liquid feeding tube 4.

Then, when the foot switch 25 is turned on, the contact 25a is closed, and the liquid supply amount signal is sent to the roller pump control circuit 24, and at the same time, the contact 25b is closed, and the electromagnetic valve 8 of the living body insertion device 7 is opened. The liquid can be sent. The roller pump control circuit 24 outputs a roller pump control signal based on the liquid supply amount signal because the liquid supply amount signal of the value set on the setting panel 23 is sent to the roller pump control circuit 24. The pump 6 is driven. Accordingly, the roller pump 6 sends the physiological saline at a preset amount, and sends the physiological saline into the body cavity 10 of the patient at a predetermined amount. Then, by turning on the foot switch 25, the physiological saline solution can be supplied continuously or intermittently.

The physiological saline supplied into the body cavity 10 of the patient through the liquid feeding tube 4 is heated by the heater 11 in the middle of the liquid feeding tube 4 and then supplied to the living body insertion device 7. At this time, the temperature of the physiological saline to be fed is calculated by the sensor control circuit 18 based on the detection signal from the temperature measuring element 16. Then, the sensor output signal of the sensor control circuit 18 is input to the minus input terminal of the comparator circuit 28.
The setting panel 2 is connected to the plus input terminal of the comparator circuit 28.
A temperature reference signal corresponding to the temperature to be heated set in step 3 is input. Accordingly, the comparator circuit 28 outputs a signal obtained by inverting the sensor output signal with reference to the temperature reference signal, and inputs the signal to the adding circuit 27.

Therefore, the adding circuit 27 adjusts the heater control signal according to the output signal from the comparator circuit 28. When the physiological saline heated by the heater 11 is lower than the set temperature, the output of the heater 11 is increased, and when the temperature is higher than the set temperature, feedback control is performed to reduce the output of the heater 11. Adjust the temperature of the saline solution to the set value. In addition to this, by turning on the foot switch 25, the roller pump control signal output from the roller pump control circuit 24 is differentiated by the differentiating circuit 29, and the output from the differentiating circuit 29 is input to the adding circuit 27. It is added to the output signal from the comparator circuit 28, and the output of the heater power supply 15 is adjusted by the added heater control signal.

Next, these operating conditions will be described with reference to FIG. FIG. 3A shows a change in the liquid feed amount signal performed in conjunction with the switching operation on the foot switch 25 or the setting panel 23. Here, a case is considered in which the liquid supply amount increases stepwise at time T. Then, the roller pump control circuit 24 receives the liquid sending amount signal and outputs a roller pump control signal (see FIG. 3B). The roller pump 6 suddenly increases the amount of liquid to be supplied, and the liquid is supplied through the liquid supply tube 4, and the change in the amount of supplied liquid increases substantially in the same manner as the waveform in FIG. In this state, the heating by the heater 11 does not follow up, and the temperature of the physiological saline to be supplied sharply decreases for a short time as in the state of change of θ ₀ indicated by the dotted line in FIG. .

However, at this time, the roller pump control signal is differentiated by the differentiating circuit 29, and the differentiated signal of the roller pump control signal is as shown in FIG.
A signal corresponding to the waveform of the differential signal is added to the adding circuit 27.
Is input to As a result, the heater control signal is increased, and the heating capability of the heater 11 is increased. That is, heater power supply 1
The output of 5 is temporarily increased. Then, even if the flow rate increases rapidly, the temperature of the physiological saline solution to be sent is maintained substantially constant as shown by the solid line in FIG. In other words, the roller pump control signal is differentiated, and this is used as a positive feedback signal to control the heating capacity of the heater 11 so that the temperature of the physiological saline that is fluctuated and fed can be kept constant.

When the amount of water supply drops rapidly, the output of the differentiating circuit 29 temporarily drops and the output of the heater power supply 15 temporarily drops. The saline solution that is liquored does not cause a sudden drop in temperature that is problematic.

In addition, a circuit for stopping the output of the differentiating circuit 29 when the amount of water supplied drops sharply may be incorporated. (Effect) Even if the amount of liquid sent fluctuates, it responds instantly to the fluctuation,
The temperature of the liquid to be sent to the living body is adjusted and always maintained at a substantially constant appropriate temperature. In particular, it is possible to provide a liquid feeding device that prevents a decrease in temperature and does not cause a patient to have a bad symptom such as a decrease in body temperature.

[Second Embodiment] A second embodiment of the present invention will be described with reference to FIGS. (Structure) The points different from those of the first embodiment will be mainly described. The same components as those in the first embodiment are denoted by the same reference numerals, and a specific description thereof will be omitted.

First, in the second embodiment, a holder device 51 for holding a container 50 containing a liquid to be supplied is configured as follows. As shown in FIG.
1 has a cylinder 53 provided on a stand 52. As shown in FIGS. 11 and 12, the cylinder 53 is rotatably mounted on a vertical rotating shaft 54 provided on the upper end of the stand 52. . A plurality of storage chambers 5 are located on the same circumference around the center of rotation of the cylinder 53.
5 are arranged at equal intervals. Each storage chamber 55 is loaded with a container (back) 50 in which sterilized physiological saline as a liquid such as an aqueous solution is sealed. The cylinder 53 is formed of a heat insulating material, and keeps the temperature of the container 50 loaded in the storage chamber 55. The container 50 is loaded with its mouth 56 down, and the mouth 56 of the selected container 51 is placed below the cylinder 53 under the liquid feeding tube 4.
The outflow needle tube 57 connected to is punctured. The tip of the liquid feeding tube 4 is inserted directly into the body cavity of the patient,
Or, connected to the same living body insertion aid 7 as described above,
Alternatively, it is connected to a liquid feed passage formed inside another device such as an endoscope.

Further, a heater element 61 of an electric heater for heating the container 50 is provided on the inner surface of the storage chamber 55, and the heater element 61 generates heat when energized, so that the container 50 is heated.
Is to be heated. That is, in this embodiment, a heating means for heating the physiological saline to be fed in the holder device 51 before sending it to the feed tube 4 is configured. Further, a temperature measuring element 62 of a temperature measuring means for measuring the temperature of the physiological saline is provided at a lower portion of the storage chamber 55.

The heater element 61 of the heating means is connected through a heater power cord 14 to a heater power supply 15 installed in the main body 5 of the liquid feeding apparatus. Further, the temperature measuring element 62 is connected to the sensor control circuit 18 installed in the liquid sending device main body 5 via the signal line 17.

Also in this embodiment, the heater power supply 15 is driven and controlled by the heater control signal output from the adding circuit 27. Further, a signal obtained by inverting the sensor output signal from the sensor control circuit 18 based on the temperature reference signal by the comparator circuit 28 is input to the addition circuit 27. In the liquid supply amount signal generating means, the roller pump control signal output from the roller pump control circuit 24 is inverted by the inversion circuit 65, and this inverted signal is input to the addition circuit 27 and added to the signal from the comparator circuit 28. It is configured to be.

(Operation) The container 50 in the holder device 51
The physiological saline contained in the heater element 6 of the electric heater is
1, the temperature is detected by the temperature measuring element 62, the temperature is controlled by the feedback control by the sensor control circuit 18, and the temperature is set to the temperature set on the setting panel 23, as described above. . The physiological saline heated in advance in the holder device 51 in this manner is sent out through the liquid feed tube 4 by the roller pump 6 with the liquid feed amount set on the setting panel 23.

Here, since all the physiological saline in the container 50 is previously raised to a predetermined temperature, when the amount of liquid supplied is changed, especially when the amount of liquid supplied becomes large, the unit is not changed. Since the heat capacity of the amount of liquid sent per time is relatively large, the temperature of the physiological saline solution does not drop significantly during the liquid feeding through the long liquid feeding tube 4.

On the other hand, when the amount of liquid supplied is reduced, the heat capacity of the amount of physiological saline to be supplied per unit time becomes relatively small, and the physiological saline is cooled while flowing through the long liquid supply tube 4,
There is a risk that the liquid sending temperature will drop. However, here, the roller pump control signal output from the roller pump control circuit 24 is inverted by the inverting circuit 65, and the inverted signal is added to the adding circuit 27.
, And is added to the signal from the comparator circuit 28, so that the output of the heater power supply 15 is instantaneously increased by the heater control signal from the comparator circuit 28. That is, in addition to the normal feedback control by the sensor control circuit 18, a control for instantaneously and strongly increasing the temperature of the physiological saline in the container 51 according to the amount of decrease in the liquid supply is performed. Therefore,
In particular, when the amount of liquid supplied is reduced, the relatively long liquid supply tube 4
To compensate for the amount of heat released during the flow of the physiological saline, and maintain the temperature of the physiological saline supplied into the body cavity through the liquid feeding tube 4 at a required temperature.

When the container 50 becomes empty, the cylinder 53 is rotated to move another new container 50 to the connection position, and the outlet 56 of the liquid supply tube 4 is punctured and connected to the outlet 56 thereof. . Since the new container 50 is also heated in advance, it is possible to immediately continue the liquid feeding.

(Effect) The temperature of the physiological saline supplied into the body cavity through the liquid feeding tube 4 can be maintained constant even if the amount of the physiological saline sent through the liquid feeding tube 4 decreases. In addition, since a large amount of physiological saline stored in the container 50 is heated in advance in the holder device 51 and then sent, the design is made such that a heating heater is provided in the middle of the liquid sending tube 4. In addition, unlike those having a limited heating capacity, even if a large amount of liquid is sent at once, the temperature does not decrease.

[Modification] A modification will be described with reference to FIGS. This modified example is another example of a holder device that holds a liquid container, and is configured to be able to automatically switch and connect a container connected to a liquid sending tube. The holder device 70 includes a box-shaped holder main body 71, and a flexible bag (container) 73 is stacked horizontally in a storage chamber 72 formed in the holder main body 71. As shown in FIGS. 15 and 16, the back 73 has puncturing holes 74 that are vertically opposed to each other on both upper and lower wall surfaces. The puncture opening 74 is covered with a protective seal 75.

A holding plate 76 is provided at the upper part of the storage chamber 72, and the holding plate 76 has a projection 77 at a side end. The protrusions 77 are fitted into guide vertical grooves 78 formed on the side surface of the holder main body 71, and the presser plate 76 is vertically movable by guiding the protrusions 77 along the vertical grooves 78. The holding plate 76 is pressed downward by an elastic urging means, for example, a spring 79. The uppermost bag 73 stacked in the storage chamber 72 is pressed downward by the holding plate 76.

A puncture needle 81 protrudes from the bottom wall of the storage chamber 72, and the puncture needle 81 is connected to the above-mentioned liquid sending tube 4 via a base 82. The puncture needle 81 is first placed in the storage chamber 72.
Puncture opening 74 of the lowermost back 73 stacked on
Has been punctured. The bag 73 stored in the storage room 72
Is provided.

A temperature measuring element 83 is provided in the base 82. The sensor control circuit 18 has its temperature measuring element 83
The temperature of the liquid sent out to the liquid feeding tube 4 is measured by the detection signal of (1), and the heater 80 is driven by performing the feedback control as described in the above-described embodiment. Further, a system in which the heater 11 is provided as in the first embodiment may be used.

Since each of the bags 73 is pressed from above by the pressing plate 76, the physiological saline stored in the lowermost bag 73 is used. When the bags 73 are emptied and completely crushed, FIG. As shown by, the puncture needle 81 penetrates through both the lowermost puncture ports 74 to puncture the lower puncture port 74 of the next back 73 and communicates with the back 73. Then, when the next bag 73 is also emptied and collapsed, the puncture needle 81 penetrates both upper and lower puncture holes 74 and punctures the lower puncture hole 74 of the next bag 73 to communicate therewith. In this way, the bags 73 connected to the liquid feeding tube 4 are automatically switched in sequence and used one after another.

In the present invention, the amount of liquid supplied from the container to the living body through the pipe member is measured, and the liquid supply signal generating means for generating a signal of a value related to the liquid supply detects the liquid amount. For example, a sensor that detects a pressure, a flow rate, or the like that changes in accordance with a change in a liquid sending amount may be used as the measuring element.

<Supplementary Notes> In a liquid sending apparatus for sending a liquid into a living body through a liquid sending pipe member connected to a container in which a liquid is sealed, a liquid sending means for sending a liquid from the container to the living body through the pipe member, and sending the liquid. Temperature measuring means for measuring the temperature of the liquid, heating means for heating the liquid in at least one of the container and the pipe member, and an adjustable amount of heat for heating the liquid; and A liquid sending amount signal generating means for issuing a signal of a value related to a liquid sending amount for sending the liquid into the living body through the pipe member; First control means for adjusting the amount of heat generated by the means to adjust the temperature of the liquid to be sent to an appropriate constant value; and receiving the signal from the liquid sending amount signal generating means, and adjusting the flow rate of the liquid to be sent. When increased, the heating means is generated The liquid supply apparatus characterized by comprising a second control means for regulating the heating means so as to increase that heat. 2. 2. The liquid supply device according to claim 1, wherein the liquid supply amount signal generating means measures the liquid supply amount based on a detection signal of a sensor that detects a pressure of the liquid sent into the living body from the container through the pipe member. 3. 2. The liquid feeding device according to claim 1, wherein the liquid sending amount signal generating means measures the liquid sending amount by a setting signal for setting the liquid sending amount on a setting panel.

4. In a liquid feeding device for feeding a liquid into a body cavity of a living body through an insertion tool connected to a distal end of a conduit connected to a container in which a liquid is sealed, a needle for puncturing the container to take out the liquid, A liquid feeding device comprising: means for holding a container so that the needle can puncture a predetermined location of the container when the container is held. 5. In a liquid feeder for feeding a liquid into a body cavity of a living body through an insertion tool connected to a distal end of a conduit connected to a container in which the liquid is sealed, the liquid feeding device includes a holding unit for the container, and a pressurizing unit for the container. A liquid sending device, comprising: a base, a cover, and an elastic body attached to the cover or the base. 6. A plurality of the containers can be stored in a liquid container that sends a liquid into a body cavity of a living body through a flexible container in which a liquid is sealed and an insertion tool connected to a distal end of a conduit connected to the container. Container holding means, pressurizing means for pressing the container, and a needle provided in the holding means, pierced into the container, and sequentially punctured into another container by deformation of the container accompanying the use of liquid. A liquid sending device.

[0046]

As described above, according to the present invention, even when the amount of liquid to be supplied changes suddenly, the temperature of the liquid is rapidly adjusted, and the temperature of the liquid to be supplied to the living body is always kept at an appropriate constant value. Thus, it is possible to provide a liquid feeding device that does not cause a patient to have a bad symptom such as a decrease in body temperature.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating a schematic configuration of a liquid feeding device according to a first embodiment.

FIG. 2 is an explanatory diagram illustrating a schematic configuration of an electric circuit of the liquid feeding device according to the first embodiment.

FIG. 3 is a diagram showing an operation state of the liquid feeding device according to the first embodiment.

FIG. 4 is a sectional view of a heater of the liquid feeding device according to the first embodiment.

FIG. 5 is a perspective view of a holder device of the liquid feeding device according to the first embodiment.

FIG. 6 is a front view of the holder device of the liquid feeding device according to the first embodiment in a used state.

FIG. 7 is a cross-sectional view in a use state of a modified example of the holder device.

FIG. 8 is a cross-sectional view of a modified example of the holder device in a cover opened state.

FIG. 9 is an explanatory diagram illustrating a schematic configuration of a liquid feeding device according to a second embodiment.

FIG. 10 is an explanatory diagram illustrating a schematic configuration of an electric circuit of a liquid feeding device according to a second embodiment.

FIG. 11 is a partial cross-sectional view of a holder device in a liquid feeding device according to a second embodiment.

FIG. 12 is a perspective view of a holder device in the liquid feeding device according to the second embodiment.

FIG. 13 is a perspective view of another holder device.

FIG. 14 is a sectional view of the holder device.

FIG. 15 is a perspective view of a bag used for the holder device.

FIG. 16 is a front view of a bag used for the holder device.

FIG. 17 is a sectional view of the holder device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cuff type back, 2 ... Holder device, 4 ... Liquid sending tube, 6 ... Roller pump, 8 ... Electromagnetic valve, 11 ... Heater, 13 ... Electrothermal heater element, 15 ... Heater power supply, 16
... temperature measuring element, 18 ... sensor control circuit, 24 ... roller pump control circuit, 25 ... foot switch, 27 ... addition circuit,
28: a comparator circuit, 29: a differentiation circuit.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masahide Oyama 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Industrial Co., Ltd. (72) Inventor Satoshi Takekoshi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.

Claims (1)

[Claims] 1. A liquid feeding device for feeding a liquid into a living body through a liquid feeding pipe member connected to a container in which the liquid is sealed, wherein the liquid is sent from the container to the living body through the pipe member. Temperature measuring means for measuring the temperature of the liquid to be sent; heating means for heating the liquid in at least one of the container and the pipe member, and capable of freely adjusting the amount of heat for heating the liquid; A liquid sending amount signal generating means for issuing a signal of a value related to a liquid sending amount for sending the liquid into the living body from the container through the pipe member, receiving a signal from the temperature measuring means, and adjusting a temperature of the liquid to be sent. First control means for adjusting the amount of heat generated by the heating means in response to the temperature of the liquid to be sent to an appropriate constant value; and receiving and sending a signal from the liquid sending amount signal generating means. When the liquid flow rate increases Liquid delivery device being characterized in that and a second control means for adjusting said heating means so as to increase the amount of heat the warming means for generating.