WO2016127860A1 - 胃管 - Google Patents

胃管 Download PDF

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Publication number
WO2016127860A1
WO2016127860A1 PCT/CN2016/073159 CN2016073159W WO2016127860A1 WO 2016127860 A1 WO2016127860 A1 WO 2016127860A1 CN 2016073159 W CN2016073159 W CN 2016073159W WO 2016127860 A1 WO2016127860 A1 WO 2016127860A1
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WO
WIPO (PCT)
Prior art keywords
stomach tube
sensor
tube
air pump
value
Prior art date
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Ceased
Application number
PCT/CN2016/073159
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English (en)
French (fr)
Inventor
张艺军
钟武装
刘坚
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General Hospital of Guangzhou Military Command
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General Hospital of Guangzhou Military Command
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Application filed by General Hospital of Guangzhou Military Command filed Critical General Hospital of Guangzhou Military Command
Priority to US15/301,951 priority Critical patent/US20180116912A1/en
Priority to EP16748661.2A priority patent/EP3103430A4/en
Publication of WO2016127860A1 publication Critical patent/WO2016127860A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J15/00—Feeding-tubes for therapeutic purposes
    • A61J15/0026—Parts, details or accessories for feeding-tubes
    • A61J15/008—Sensor means, e.g. for sensing reflux, acidity or pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6867—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive specially adapted to be attached or implanted in a specific body part
    • A61B5/6871—Stomach
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J15/00—Feeding-tubes for therapeutic purposes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J15/00—Feeding-tubes for therapeutic purposes
    • A61J15/0003—Nasal or oral feeding-tubes, e.g. tube entering body through nose or mouth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J15/00—Feeding-tubes for therapeutic purposes
    • A61J15/0015—Gastrostomy feeding-tubes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J15/00—Feeding-tubes for therapeutic purposes
    • A61J15/0026—Parts, details or accessories for feeding-tubes
    • A61J15/0096—Provisions for venting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/42—Detecting, measuring or recording for evaluating the gastrointestinal, the endocrine or the exocrine systems
    • A61B5/4222—Evaluating particular parts, e.g. particular organs
    • A61B5/4238—Evaluating particular parts, e.g. particular organs stomach
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J15/00—Feeding-tubes for therapeutic purposes
    • A61J15/0026—Parts, details or accessories for feeding-tubes
    • A61J15/0069—Tubes feeding directly to the intestines, e.g. to the jejunum
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J15/00—Feeding-tubes for therapeutic purposes
    • A61J15/0026—Parts, details or accessories for feeding-tubes
    • A61J15/0076—Feeding pumps

Definitions

  • the invention relates to the field of medical devices, in particular to a stomach tube for preventing aspiration.
  • nasal feeding is used for patients who cannot take oral or swallowing disorders, such as coma, craniocerebral injury, Parkinson's disease, post-gastrointestinal surgery or post-neck surgery and critically ill patients, and enteral nutrition support through nasal feeding. It is one of the important treatments for critically ill patients. It not only provides the body with comprehensive nutritional requirements, maintains energy and balances water, salt and electrolytes, but also maintains the physiological functions of the normal gastrointestinal tract and promotes the early recovery of gastrointestinal function. Parenteral nutrition is economical and convenient, and the injection of drugs through the nasogastric tube can achieve the purpose of treating diseases.
  • gastrostomy is still not acceptable to the majority of patients and their families.
  • patients with severe cardiopulmonary disease can not cooperate with gastroscopy or the stomach wall and abdominal wall can not be close, there is abdominal effusion, peritonitis, or patients with diabetes or severe disease, and some patients can not complete gastrostomy in primary hospitals.
  • Surgery Some of the patients with postoperative gastrostomy have not been widely used because of repeated exudation around the fistula, and even repeated food from the ostomy mouth after eating, which affects the patient's feeding.
  • indwelling gastric tubes are widely used in general departments as a basic simple nursing practice, and are also accepted by a wide range of patients and their families. Therefore, research and development in the prior art has focused on preventing aspiration of the stomach tube.
  • stomach tube to prevent the occurrence of reflux.
  • gastric tubes that prevent aspiration in the country, which are inspired by the three-chamber two-capsule tube.
  • the stomach tube is a medical silicone stomach tube, and a first low pressure cuff and a second low pressure cuff are disposed on the outer wall of the front end thereof, and the other end of the stomach tube is provided with two inflation catheters, and the inflation catheter is respectively provided with a first inflation piston and a second inflation piston, the first inflation piston is in communication with the first low pressure cuff through the inflation conduit, and the second inflation piston is in communication with the second low pressure cuff through the inflation conduit, and simultaneously or alternately inflating the two low pressure cuffs
  • the gap between the outer wall of the gastric tube and the inner wall of the esophagus prevents aspiration.
  • the modified stomach tube reduces the aspiration, it needs to alternately inflate the airbag to complete the prevention of aspiration, and the position of the airbag is fixed, so the long-term inevitable damage to the mucous membrane of the esophageal compression area may even cause The formation of esophageal ulcers or perforations.
  • the inflator cannot be activated to prevent reflux aspiration.
  • the other type of stomach tube is a double-chamber balloon stomach tube developed by the Luohu District People's Hospital of Shenzhen and the Zhanjiang City Shida Industrial Co., Ltd. of Guangdong province in March 2007. That is, the three-chamber two-capsule tube commonly used in clinical practice is selected as the main structure, the esophageal sac is removed, the gastric sac and the side hole are retained, and the double-chamber balloon gastric tube is prepared, and the balloon inlet is inflated 80-100 ml before the feeding, and the stomach tube is Pull outward until there is resistance and fix it, then start feeding to the stomach tube, feed for 10-30 minutes, and completely deflate the balloon after 60 minutes.
  • this type of gastric tube also has the disadvantage of the former gastric tube.
  • the time when the patient has reflux is difficult to predict, so it cannot be processed in real time, resulting in the occurrence of aspiration.
  • the disadvantages in the prior art are mainly: 1.
  • the insufficiency cannot be completely prevented; 2.
  • the device for preventing aspiration is prone to esophageal mucosal damage caused by repeated compression of the esophagus for a long time.
  • an object of the present invention is to provide a gastric tube for use in a nasal feeding patient to prevent aspiration and to avoid damage to the esophageal mucosa.
  • the present invention uses a pH sensor to monitor the pH value in the esophagus in real time. Once the esophageal pH value is less than 4, the air pump is activated to expand the balloon and perform real-time monitoring. To prevent the effect of reflux.
  • a stomach tube for preventing aspiration comprising a control circuit, an air pump, a pH value sensor and a stomach tube provided with an air bag, wherein the air pump is connected to the air bag, and the PH value sensor is disposed at The inner wall of the stomach tube is 40 cm away from the incisors, and the control circuit is connected to the air pump and the pH sensor, respectively.
  • control circuit includes a PH value comparison module, the PH value sensor is connected to an input end of the PH value comparison module, and an output end of the PH value comparison module is connected to the air pump.
  • the stomach tube is provided with an air passage with a gas port, and the air port is in communication with the air bag.
  • an upper end of the air passage is provided with an air inlet communicating with the air pump.
  • a plug is disposed at a lower end of the air passage.
  • a sensor circuit is disposed on the stomach tube, and the control circuit is connected to the PH value sensor through the sensor line.
  • a protective layer is disposed outside the sensor line.
  • a sealing cuff is disposed outside the mouth of the balloon and the stomach tube, and an inner liner is disposed inside the stomach tube where the balloon is connected with the stomach tube.
  • the stomach tube is made of a polyester soft material.
  • a pressure sensor is further disposed in the air bag, and the control circuit further includes a pressure comparison module, wherein the pressure sensor is connected to an input end of the pressure comparison module, and an output end of the pressure comparison module is connected to the air pump.
  • the invention has the beneficial effects that the gastric tube of the invention utilizes the pH sensor and the pressure sensor to monitor the pH value of the esophagus and the pressure of the airbag in real time, accurately and pre-detects the appearance of each gastroesophageal reflux, and avoids the reflux.
  • Figure 1 is a block diagram of the structure of the present invention
  • Figure 2 is a schematic view showing the structure of a stomach tube portion of the present invention
  • Figure 3 is a schematic cross-sectional view showing the structure of the gastric tube of the present invention
  • a stomach tube for preventing aspiration includes a control circuit, an air pump, a pH sensor, and a stomach tube provided with an air bag, the air pump being in communication with the air bag, the PH value sensor being disposed on the inner wall of the stomach tube from the incisor At 40 cm, the control circuit is connected to the air pump and the pH sensor, respectively.
  • control circuit includes a PH value comparison module, the PH value sensor is connected to an input end of the PH value comparison module, and an output end of the PH value comparison module is connected to the air pump.
  • the PH sensor of the present invention is connected to the air pump through a control circuit, and when the PH value is lower than 4, the air pump is activated to expand the airbag to prevent gastroesophageal reflux; on the basis of this, the control circuit can be used to prevent the control of the aspiration tube.
  • the system works according to the set control parameters, detects and controls the working state and working parameters of the gas source, provides the working state of the gastric acid sensor, forms a closed loop circuit, and adjusts the air pump according to the pH control result of the sensor according to the developed control algorithm.
  • the output pressure prevents the aspiration of the stomach tube from working at its optimum state.
  • the stomach tube 2 is provided with an air passage 3 with a port 6, which communicates with the air bag 12.
  • the upper end of the air passage 3 is provided with an air inlet 1 that communicates with the air pump.
  • the lower end of the air passage 3 is provided with a plug 8 .
  • the stomach tube 2 is provided with a sensor line 5, which is connected to the pH sensor 9 via a circuit interface 14 on the upper part of the sensor line 5.
  • the sensor line 5 is externally provided with a protective layer.
  • the sensor line 5 and the airway 3 are disposed on both sides of the tube wall of the stomach tube 2. As shown in FIG. 3, the nutrient solution channel 4 is formed in the middle of the stomach tube 3.
  • the outer portion of the balloon 12 and the stomach tube 2 is provided with a sealing cuff, such as the upper sealing cuff 10a and the lower sealing cuff 10b shown in FIG. 2, the balloon 12 and the stomach tube 2
  • a sealing cuff such as the upper sealing cuff 10a and the lower sealing cuff 10b shown in FIG. 2, the balloon 12 and the stomach tube 2
  • the inner stomach tube 13 is provided inside the stomach tube at the joint (the inner liner ring corresponding to the lower seal hoop 10b is not shown in Fig. 2).
  • the stomach tube is made of a polyester soft material.
  • the airbag is further provided with a pressure sensor
  • the control circuit further includes a pressure comparison module, wherein the pressure sensor is connected to an input end of the pressure comparison module, and the pressure comparison module The output is connected to the air pump.
  • the pressure sensor is also connected to the control circuit via a sensor line.
  • a negative feedback loop of the airbag pressure is formed in the control system to further strengthen the precise control of the airbag pressure.
  • the gastric tube is first inserted into the patient's gastroesophage during use.
  • the large hole 4 in the middle is a nutrient solution channel, and the nutrient solution required for supplying the patient's life is input through the channel.
  • the hole 3 is an air passage, and the compressed air of the air pump can enter the air bag 12 through the air inlet 3 and the air hole 3 to inflate the air bag 12, and the air bag tube 11 blocks the gastroesophageal passage 7.
  • the other hole 5 in the section of the stomach tube is the sensor line channel, and the line of the PH sensor 9 at the lowermost end of the stomach tube passes through the hole 5 to the upper end of the stomach tube, and is connected to the external circuit through the circuit interface 14.
  • the balloon tube 11 and the gastric tube 2 are fixed by an inner liner 13 which is fitted into the inner wall of the stomach tube and the outermost sealing band 10.
  • the stomach tube 2 is a three-hole through-tube, and the air port 6 is reworked in the middle to allow compressed air to enter the air bag 12, and a plug 8 is added at the bottom of the stomach tube 2 to prevent compressed air from being introduced into the stomach of the human body.
  • the pH sensor 9 in the lower part of the stomach tube 2 is used for detecting the pH of the gastric juice of the patient.
  • the sampled voltage value obtained by the pH sensor 9 will be smaller than the set value of the PH value comparison module in the control circuit, so The PH value comparison module will output a high level control system to start the air pump, and the compressed air is introduced into the air bag 12, and the air bag 12 is swollen to block the stomach tube to prevent the gastroesophageal reflux.
  • the pressure comparison module When the pressure sensor detects that the pressure reaches the set value, the sampled voltage value obtained by the pressure sensor will be greater than the set value of the pressure comparison module in the control circuit, so the pressure comparison module will output a low-level control system to control the air pump to stop working.
  • the air pump When the pressure is lower than the set value, the air pump automatically starts, the balloon expands automatically, and the air pressure is kept constant, or it changes according to the set requirements.

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Abstract

一种防止误吸的胃管（2），包括有控制电路、气泵、PH值传感器（9）和设置有气囊（12）的胃管（2），气泵与气囊（12）连通，PH值传感器（9）设置于胃管（2）内壁距离门齿40cm处，控制电路分别与气泵和PH值传感器（9）连接。通过PH值传感器（9）与压力传感器对食道内PH值以及气囊（12）压力的实时监控，可以准确并提前检测到每次胃食道反流的出现，避免了反流所导致的误吸以及导致隐性肺炎的可能；通过实时控制的方式实现自动启动气囊（12）的扩张，避免了气囊（12）长时间对食道的压迫引起的食道黏膜损伤，并能减少使用者胸骨后的不适感。

Description

一种防止误吸的胃管
技术领域
本发明涉及医疗器械领域，尤其是一种防止误吸的胃管。
背景技术
鼻饲饮食的患者需要通过留置胃管进食，但是依靠鼻饲饮食的患者发生胃食道反流或者吸入性肺炎的几率很高。
众所周知，鼻饲用于不能经口进食或吞咽障碍的患者，如昏迷、颅脑损伤，帕金森氏病、胃肠道手术后或者头颈部手术后患者以及重症患者，通过鼻饲进行肠内营养支持是危急重症患者的重要治疗手段之一，它不仅能提供给机体全面营养要求、维持能量以及水盐电解质平衡，同时也保持了正常胃肠道的生理功能，促进胃肠功能的早日恢复，较肠外营养经济方便，而且经鼻饲管注药可以达到治疗疾病的目的。但是，长期留置胃管会增加胃食道反流的风险，反流的结果导致返流性食道炎以及吸入性肺炎，其发病率高达10－22％。同时，一次大量的反流会导致患者窒息而死亡，严重危害了患者的健康。因此，如果能减少与胃管相关的胃食道反流，其临床意义重大。然而，该问题也是长期以来困扰广大患者的难题，也是医学工作者们的研究热点。
有研究报道，通过调整胃管的插管深度，改变胃管的直径，或者控制食物流入胃内的速度，调整食物容量或者进食时抬高患者头位等措施可以减少部分患者的胃食道反流，但是仍然未能防止大多数患者的胃食道反流。近年来，国内外的学者建议如果患者需要留置胃管超过1个月，发生胃食道反流的机会会大大增加，因此需要采用胃造瘘术来完成胃肠营养，其目的是为了减少患者的误吸发生，也是减少胃管相关的吸入性肺炎的权宜之计。然而，胃造瘘术作为一种有创性的操作，仍然不能被广大患者及其家属所接受。而且，对于有严重心肺疾患，不能配合行胃镜检查或者胃壁和腹壁不能贴近，有腹腔积液，腹膜炎，或者合并有糖尿病或者病情严重的患者，还有部分患者在基层医院也不能完成胃造瘘术。其中有部分胃造瘘术后的患者因瘘口周围反复渗液、甚至在进食后有反复的食物从造瘘口反流出，而影响患者的喂养，因此仍未能被广泛应用。
相比较而言，留置胃管作为一种基本的简单护理操作常规更能广泛应用于普通科室，也能被广泛的患者及家属所接受。因此，现有技术中的研发着重于防止误吸的胃管。
近来，有学者在胃管的结构上进行改进来预防反流的发生。国内有两种新型的防止误吸发生的胃管，均从三腔二囊管的基础上得到启发改造而来。一种为2007年江苏如皋市人民医院研发的预防误吸的胃管（200620048639.8）。该型胃管为医用硅胶胃管，在其前端外壁设置有第一低压套囊和第二低压套囊，胃管的另一端设置有两根充气导管，充气导管分别设置有第一充气活塞和第二充气活塞，第一充气活塞通过充气导管与第一低压套囊相连通，第二充气活塞通过充气导管与第二低压套囊相连通，通过对两个低压套囊同时或交替充气，封堵胃管外壁与食道内壁之间的空隙预防误吸。虽然改型胃管减少了误吸，但是它需要交替对气囊充气来完成对误吸的预防，而气囊的位置是固定的，因此长期不可避免地对食道被压迫区域的粘膜发生损害，甚至导致食道溃疡或者穿孔的形成。而且，对于胃肠动力差的患者，在注食后1－2小时也会面临反流的风险，如果出现较大量的反流，也不能启动该充气装置来防止反流误吸的发生。
另一种胃管为深圳市罗湖区人民医院联合广东省湛江市事达实业有限公司于2007年3月研制的双腔气囊胃管。即选择临床上常用的三腔二囊管作为主体结构，去除了食道囊，保留了胃囊和侧孔，制成双腔气囊胃管，注食前向气囊入口充气80－100ml，并将胃管向外牵拉至有阻力后固定，再开始向胃管注食，注食10－30分钟，60分钟后将气囊完全放气。但是，使用该型胃管同样有前一种胃管的缺点。同样对患者出现反流的时间难以预测，因此也不能实时进行处理，导致误吸的发生。
国外学者主要采用胃造瘘的方法来解决长期留置胃管患者的营养问题，减少了胃食道反流的发生。但是仍然有相当一部分患者以及一部分无适应症的患者不能采纳该方法。查阅国外近期发表的文献，主要通过改进胃管的直径或长度、以及材料来解决这个临床上的难题。对于因食道良恶性病变引起的食道狭窄，并造成的吞咽困难的患者，他们采用食道内支架的方法来保证患者的营养供应。
综上所述，现有技术中的缺点主要在于：1、不能完全防止误吸；2、用于防止误吸的设备容易因长时间反复压迫食道造成的食道黏膜损伤。
发明内容
为了解决上述技术问题，本发明的目的是：提供一种供鼻饲患者使用的防止误吸、避免食道黏膜损伤的胃管。
经研究发现，胃食道反流时食道PH值小于4，因此本发明采用PH值传感器对食道内PH值进行实时监测，一旦监测发现食道PH值小于4，则启动气泵使气囊扩张，发挥实时监控、防止反流的作用。
本发明所采用的技术方案是：一种防止误吸的胃管，包括有控制电路、气泵、PH值传感器和设置有气囊的胃管，所述气泵与气囊连通，所述PH值传感器设置于胃管内壁距离门齿40cm处，所述控制电路分别与气泵和PH值传感器连接。
进一步，所述控制电路包括有PH值比较模块，所述PH值传感器与PH值比较模块的输入端连接，所述PH值比较模块的输出端与气泵连接。
进一步，所述胃管上设置有带有气口的气道，所述气口与气囊连通。
进一步，所述气道的上端设置有与气泵连通的进气口。
进一步，所述气道的下端设置有堵头。
进一步，所述胃管上设置有传感器线路，所述控制电路通过传感器线路与PH值传感器连接。
进一步，所述传感器线路外部设置有保护层。
进一步，所述气囊与胃管连接处的外部设置有密封箍，所述气囊与胃管连接处的胃管内部设置有内衬环。
进一步，所述胃管由聚脂软材料制成。
进一步，所述气囊中还设置有压力传感器，所述控制电路还包括有压力比较模块，所述压力传感器与压力比较模块的输入端连接，所述压力比较模块的输出端与气泵连接。
本发明的有益效果是：本发明胃管利用了PH值传感器与压力传感器对食道内PH值以及气囊压力的实时监控，准确并提前检测到每次胃食道反流的出现，避免了反流所导致的误吸以及导致隐性肺炎的可能；同时，本发明采用实时控制的方式实现自动启动球囊的扩张，避免了气囊长时间对食道的压迫引起的食道黏膜损伤，并能减少使用者胸骨后的不适感。
附图说明
图1为本发明结构框图；
图2为本发明胃管部分的结构示意图；
图3为本发明胃管结构的横截面示意图
图中：1、进气口；2、胃管；3、气道；4、营养液通道；5、传感器线路；6、气口；7、胃食道；8、堵头；9、PH值传感器；10、密封箍；11、气囊管；12、气囊；13、内衬环；14、电路接口。
具体实施方式
下面结合附图对本发明的具体实施方式作进一步说明：
参照图1，一种防止误吸的胃管，包括有控制电路、气泵、PH值传感器和设置有气囊的胃管，所述气泵与气囊连通，所述PH值传感器设置于胃管内壁距离门齿40cm处，所述控制电路分别与气泵和PH值传感器连接。
进一步作为优选的实施方式，所述控制电路包括有PH值比较模块，所述PH值传感器与PH值比较模块的输入端连接，所述PH值比较模块的输出端与气泵连接。
本发明的PH传感器通过控制电路连接气泵，当PH值一旦低于4则启动气泵，让气囊扩张，防止胃食道反流；在此基础上，还能够利用控制电路开发防止误吸胃管的控制系统，该系统根据设置的控制参数工作，检测和控制气源的工作状态和工作参数，提供胃酸传感器的工作状态，形成闭环回路，根据传感器的酸碱度检测结果，按照开发的控制算法，调节气泵的输出压力，使防止误吸胃管始终工作于最佳的状态。
参照图2，进一步作为优选的实施方式，所述胃管2上设置有带有气口6的气道3，所述气口6与气囊12连通。
进一步作为优选的实施方式，所述气道3的上端设置有与气泵连通的进气口1。
进一步作为优选的实施方式，所述气道3的下端设置有堵头8。
进一步作为优选的实施方式，所述胃管2上设置有传感器线路5，所述控制电路通过传感器线路5上部的电路接口14与PH值传感器9连接。
进一步作为优选的实施方式，所述传感器线路5外部设置有保护层。
所述传感器线路5与气道3设置于胃管2的管壁两侧，如图3所示，胃管3中部形成营养液通道4。
进一步作为优选的实施方式，所述气囊12与胃管2连接处的外部设置有密封箍，如图2所示的上密封箍10a和下密封箍10b，所述所述气囊12与胃管2连接处的胃管内部设置有内衬环13（与下密封箍10b对应的内衬环在图2中未显示）。
进一步作为优选的实施方式，所述胃管由聚脂软材料制成。
参照图2，进一步作为优选的实施方式，所述气囊中还设置有压力传感器，所述控制电路还包括有压力比较模块，所述压力传感器与压力比较模块的输入端连接，所述压力比较模块的输出端与气泵连接。
所述压力传感器同样通过传感器线路与控制电路连接。
根据压力传感器采集的数据，在控制系统组成一个气囊压力的负反馈回路，进一步加强对气囊压力的精确控制。
参照图2和图3说明本发明的工作流程：
首先在使用时此胃管插入病人的胃食道。胃管2截面上有三个孔道，中间的大孔4为营养液通道，供应病人生命所需的营养液由此孔道输入。另外还有两个小孔，孔3为气道，气泵压缩空气可通过进气口1，经过气道3和气孔6进入气囊12，将气囊充胀，气囊管11将胃食道7堵塞。胃管截面上另一个孔5为传感器线路通道，胃管最下端的PH值传感器9的线路通过孔5到达胃管上端，再经过电路接口14与外面电路相连。
气囊管11和胃管2之间通过镶入胃管内壁的内衬环13和最外的密封箍10固定。
胃管2为三孔贯穿的软管，中间要再加工出气口6以使压缩空气进入气囊12，同时要在胃管2底部加装堵头8，避免压缩空气导入人体胃中。
胃管2中下段的PH值传感器9用于检测病人胃液酸碱度，当PH值低于4时，PH值传感器9的获取的采样电压值将小于控制电路中PH值比较模块的设定值，因此PH值比较模块将输出高电平控制系统启动气泵，压缩空气导入气囊12，气囊12胀大堵塞胃管，以达到防止胃食道反流的目的。
当压力传感器检测到压力达到设定值，其获取的采样电压值将大于控制电路中压力比较模块的设定值，因此压力比较模块将输出低电平控制系统控制气泵停止工作。当压力低于设定值，气泵自动启动，球囊自动扩张，并以此保证气压的恒定，或者按照设定的要求变化。
以上是对本发明的较佳实施进行了具体说明，但本发明创造并不限于所述实施例，熟悉本领域的技术人员在不违背本发明精神的前提下还可以作出种种的等同变换或替换，这些等同的变形或替换均包含在本申请权利要求所限定的范围内。

Claims (10)

  1. 一种防止误吸的胃管，其特征在于：包括有控制电路、气泵、PH值传感器和设置有气囊的胃管，所述气泵与气囊连通，所述PH值传感器设置于胃管内壁距离门齿40cm处，所述控制电路分别与气泵和PH值传感器连接。
  2. 根据权利要求1所述的一种防止误吸的胃管，其特征在于：所述控制电路包括有PH值比较模块，所述PH值传感器与PH值比较模块的输入端连接，所述PH值比较模块的输出端与气泵连接。
  3. 根据权利要求1所述的一种防止误吸的胃管，其特征在于：所述胃管上设置有带有气口的气道，所述气口与气囊连通。
  4. 根据权利要求3所述的一种防止误吸的胃管，其特征在于：所述气道的上端设置有与气泵连通的进气口。
  5. 根据权利要求3所述的一种防止误吸的胃管，其特征在于：所述气道的下端设置有堵头。
  6. 根据权利要求1所述的一种防止误吸的胃管，其特征在于：所述胃管上设置有传感器线路，所述控制电路通过传感器线路与PH值传感器连接。
  7. 根据权利要求1所述的一种防止误吸的胃管，其特征在于：所述传感器线路外部设置有保护层。
  8. 根据权利要求1所述的一种防止误吸的胃管，其特征在于：所述气囊与胃管连接处的外部设置有密封箍，所述气囊与胃管连接处的胃管内部设置有内衬环。
  9. 根据权利要求1所述的一种防止误吸的胃管，其特征在于：所述胃管由聚脂软材料制成。
  10. 根据权利要求1所述的一种防止误吸的胃管，其特征在于：所述气囊中还设置有压力传感器，所述控制电路还包括有压力比较模块，所述压力传感器与压力比较模块的输入端连接，所述压力比较模块的输出端与气泵连接。
PCT/CN2016/073159 2015-02-13 2016-02-02 胃管 Ceased WO2016127860A1 (zh)

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