JP2008272179A - Administration apparatus for tube feeding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To administer appropriate semisolid nutritional supplement to a patient without applying burden on a nursing person. <P>SOLUTION: An administration apparatus includes a pressure bag 1 inflated/deflated by air feed/discharge and superposed with a plurality of independent air chambers 1a-1d, a nutritional supplement storage container 2 disposed to receive a pressure by the pressure bag and having flexibility, an air feed mechanism 100 for sequentially feeding air from the air chambers 1a-1d positioned on one end side of the pressure bag 1 to the air chambers positioned on the other end side, and administration means 4 for administering the nutritional supplement which is pushed out from the other side by sequentially pressing/compressing the nutritional supplement storage container 2 from one end side to the other end side by the air feed mechanism 100. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a tube feeding device for extruding a nutrient solution from a nutrient solution storage container little by little and administering it to a gastrostomy or the like constructed in a patient.

  In general, as a method of nutritional administration to nurses who have difficulty in taking nutrients orally due to dysphagia, etc., a gastrostomy (an artificial conduit that can pour nutrients directly into the stomach) is created in the patient, The tube feeding method that feeds nutrition through a tube is known. Conventional nutrients were only liquid fluids with high fluidity, but for patients who are almost bedridden, fluid fluids are easy to reverse after entering the stomach. The drug may enter the trachea through the lower esophagus and cause aspiration pneumonia. Then, the process which mixes agar etc. with a nutrient and makes it semi-solid and has a thick gel form is performed. Nutrient manufacturers also develop and sell semi-solid type nutrients.

When a nutrient is administered to a patient, a semi-solid type nutrient with low fluidity is connected to the mouth of the container of the nutrient solution supplied by the manufacturer and the stomach fistula with a tube, and the container is manually pressed. Extrude the nutrient inside the container and administer it. Adjust the speed of administration with the pressure on the container. On the other hand, for liquid nutrients with high fluidity, the nutrient container is set at a position higher than the patient's position as in the case of intravenous injection or intravenous injection, and the nutrient is delivered by dropping its own weight. The administration speed is controlled by adjusting a valve provided in the middle of the tube.
JP 2005-342429 A Japanese Patent No. 3421426 Japanese Patent Publication No. 5-3319

  However, since these nutrients are administered about 400 ml of nutrients at a time over 20 to 30 minutes, they are administered by manually crushing a container containing a semi-solid nutrient, or those that fall under their own weight. In this method, it is necessary for the nurse to slowly and carefully administer, not only taking time and effort, but also because it is administered by human sense, it is difficult to administer at a constant rate.

  The present invention solves the above-described problems and provides a tube feeding device that enables administration of an optimal semi-solid nutrient to a patient without burdening a nurse for administration. Let that be the issue.

  In order to solve the above-mentioned problem, the invention according to claim 1 is arranged such that a pressure bag having a plurality of independent air chambers that can be inflated and contracted by supplying and discharging air, and the pressure bag can receive pressure. A flexible nutrient container, an air feed mechanism for sequentially supplying air from an air chamber located at one end of the pressurized bag to an air chamber located at the other end, and the air feed mechanism. And an administration unit that administers the nutrients pushed out from the other end side by sequentially compressing and compressing the nutrient container from one end side to the other end side.

  According to a second aspect of the present invention, in the first aspect, the air feeding mechanism includes a common air feeding device connected to each of the open / close valves provided corresponding to the air chambers, and the air chambers. A pressure sensor for detecting each pressure and a control device for controlling the open / close valve are provided, and the control device opens the open / close valve leading to the air chamber on the one end side to supply air from the air feeding device. When the pressure sensor provided corresponding to the one end side air chamber detects a predetermined pressure, the open / close valve provided corresponding to the other end side air chamber adjacent to the one end side air chamber is opened. Then, air is supplied.

  According to a third aspect of the present invention, in the first aspect, the air feed mechanism is branched from the air supply device connected to the air chamber located on the one end side via the air supply pipe, and the air supply pipe. A first branch pipe connected to an air chamber on the other end adjacent to the air chamber located on the one end side, and a valve opening operation provided at a predetermined first pressure or more provided in the path of the first branch pipe The first opening / closing valve is provided.

  According to a fourth aspect of the present invention, in the third aspect, the air feeding mechanism is connected to the first branch pipe on the downstream side of the first on-off valve and is adjacent to the air chamber on the other end side. A second branch pipe connected to an air chamber located on the other end side of the air chamber on the other end side, and a second branch pipe provided in the middle of the path of the second branch pipe and equal to or higher than the first pressure. A second open / close valve is provided that opens when the pressure is reached.

  According to the present invention, it is possible to save the labor that the nurse has manually pressed the nutrient container for administration for about 20 to 30 minutes for administration of the nutrient. Moreover, unlike the case where it is administered in the sense of a nurse when pressing by manual operation, it can be administered at a constant speed. Therefore, the optimal semi-solid nutrient can be administered to the patient without burdening the nurse for administration.

  In addition, since the nutrient container is pressure-compressed sequentially from one end to the other, the nutrient inside the nutrient container can be reliably pushed out from one end to the other. It is possible to prevent the nutrient from remaining inside the container.

  FIG. 1 is an overview of a tube feeding device. The administration device administers nutrients to the stomach fistula of a patient, and includes a pressure bag 1 formed in a substantially cylindrical shape in which a plurality of independent air chambers 1a, 1b, 1c, and 1d are formed, and a pressure bag Air is sequentially supplied from the flexible nutrient container 2 stored in the gap inside 1 and the air chamber 1a located on one end side to the air chambers 1b, 1c, 1d located on the other end side. An air feeding mechanism 100 that performs the above-described operation, and a dosing means 4 that administers the nutrient solution pushed out from the other end by sequentially compressing and compressing the nutrient solution storage container 2 from one end side to the other end side by the air feeding mechanism 100. It is composed of

  The air chambers 1a, 1b, 1c, and 1d are formed so as to be able to expand and contract by supplying and discharging air. Therefore, the “stratification” only needs to be formed in a layer shape as a result of the expansion. It does not have to be layered in the state.

  The pressurization bag 1 is a substantially cylindrical air bag, and is formed so that the storage part 3 of the nutrient solution storage container 2 is surrounded by the air bag in the center part. Independent air chambers 1a, 1b, 1c and 1d are stratified in the vertical direction. Air inlets 5 are respectively formed in the air chambers 1a, 1b, 1c, and 1d of each layer.

  The nutrient container 2 is a flexible bag-like container such as a retort pouch, and is filled with a semi-solid tube nutrient. A tube feeding agent is an enteral feeding agent that is administered to the gastrostomy a of a patient and absorbed from the intestinal wall, and is composed of a main ingredient containing a nutrient component and a thickening agent for imparting viscosity to the main ingredient. It is semi-solid as a whole. The reason for making it semi-solid is to prevent it from flowing into the esophagus after entering the stomach and entering the trachea from the lower swallow. A hanging ring 6 is formed at the upper end of the nutrient container 2 and an extrusion port 7 is formed at the lower end.

  The nutrient container 2 is stored in the storage part 3 of the pressure bag 1. At this time, the uppermost layer air chamber 1a located on one end side of the pressurized bag 1 is the upper part of the nutrient solution storage container 2, the second layer air chamber 1b is the middle upper part of the nutrient solution storage container 2, and the third layer. The air chamber 1 c is mounted so as to correspond to the lower middle part of the nutrient solution storage container 2, and the lowermost air chamber 1 d located on the other end side of the pressurized bag 1 corresponds to the lowermost part of the nutrient solution storage container 2.

  In addition, one end of the administration tube 4 is connected to the extrusion port 7 at the lower end of the nutrient solution storage container 2 as administration means. The other end of the administration tube 4 is connected to the patient's gastrostomy a (see FIG. 2).

  Next, as shown in FIG. 2, the air feed mechanism 100 is connected to each of the air chambers 1a, 1b, 1c, and 1d and the common air that is connected via the open / close valves V1, V2, V3, and V4. From the feeding device 10, pressure sensors S1, S2, S3, S4 for detecting the pressures of the air chambers 1a, 1b, 1c, 1d, respectively, and a control device 15 for controlling the on-off valves V1, V2, V3, V4 It is configured. The control device 15 may be configured by a microcomputer. The memory of the control device 15 stores a relationship table between the set pressure of the pressure bag 1, the viscosity of the nutrient solution, and the administration speed.

  The air feeder 10 may be an electric air compressor, a manual air pump, or an air cylinder. A common air supply line 12 from the air feeding device 10 is branched into four in the middle, and each branch line 12a, 12b, 12c, 12d is each air chamber 1a, 1b, 1c, 1d of the pressure bag 1. It is connected to the. Each branch pipe 12a, 12b, 12c, 12d is provided with opening / closing valves V1, V2, V3, V4 and pressure sensors S1, S2, S3, S4. An exhaust pipe 14 that leads to an exhaust port is branched from the air supply pipe 12, and an exhaust valve V5 is provided in the exhaust pipe 14. The air feeder 10, the open / close valves V1, V2, V3, and V4, the exhaust valve V5, and the pressure sensors S1, S2, S3, and S4 are connected to the control device 15, respectively.

  Next, referring to FIGS. 2 and 3, the control of the tube feeding agent administration device by the air feeding mechanism 100 will be described together with its usage mode. First, the ring 6 of the nutrient solution storage container 2 is engaged with a hook 16 provided on the top of the stand or the pedestal and suspended. One end of the administration tube 4 is connected to the extrusion port 7 at the lower end of the nutrient container 2 and the other end is connected to the gastrostomy a of the patient. In addition, it is preferable to store the pressurizing bag 1 in the inside of the hard case 9, as shown in FIG. This is to prevent the pressure bag 1 from being unnecessarily bulged outward.

  Then, a button (not shown) provided on the control unit housing 15A that houses the control device 15 and the open / close valves V1, V2, V3, V4, the exhaust valve V5, the pressure sensors S1, S2, S3, S4, and the like. Set by etc. As described above, since the relationship between the set pressure of the pressure bag 1, the viscosity of the nutrient, and the administration speed is calculated in advance, the pressure is set by the control device 15 by inputting the charging time. After that, when a start button for administration of nutrients (not shown) provided in the control unit housing 15A is pressed, the open / close valve V1 leading to the uppermost air chamber 1a is opened (the other open / close valves V2, V3, V4 and exhaust). The valve V5 is closed). Since air is sent from the air supply pipe 12 and the branch pipe 12a to the air chamber 1a, the air chamber 1a expands as shown in FIGS. For this reason, the storage part 3 inside the pressurizing bag 1 becomes small, and the uppermost part of the nutrient solution storage container 2 is pressurized and compressed, and the tube nutrient in the nutrient solution storage container 2 is slightly increased by the pressure. It is pushed out from the extrusion port 7 one by one and put into the gastric fistula a through the administration tube 4.

  When air is sent to the air chamber 1a, the pressure in the air chamber 1a is gradually increased while being detected by the pressure sensor S1, but the nutrient is pushed out of the nutrient container 2 and the nutrient container 2 is When the volume is reduced, a space in which the air chamber 1a can be further expanded by that amount, and the pressure in the air chamber 1a decreases. When a pressure drop of a certain level or more is detected by the pressure sensor S1, the air feeder 10 is restarted and the pressure is increased until the pressure reaches a predetermined value. When the pressure increases, the nutrient container 2 is further pressurized and compressed to continuously extrude the nutrient.

  In this way, the pressure of the air in the air chamber 1a gradually increases and the air chamber 1a swells with air, so that the uppermost portion of the nutrient container 2 is almost crushed as shown in FIG. Then, since the nutrient container 2 is not reduced any more, the pressure sensor S1 and the timer do not change the pressure for a certain period of time after the air pressure in the air chamber 1a becomes a predetermined pressure. When it is detected, the control device 15 determines that no nutrients that can be pushed out by the air chamber 1a out of the nutrients stored in the nutrient solution storage container 2, and opens the open / close valve V1 of the uppermost air chamber 1a. Close and open the on-off valve V2 connected to the second-layer air chamber 1b. Since air is sent from the air supply pipe 12 and the branch pipe 12b to the second-layer air chamber 1b, the air chamber 1b expands and pressurizes the middle upper portion of the nutrient container 2 as shown in FIG. The tube feeding nutrient is gradually pushed out from the extrusion port 7 by the pressure and supplied to the gastrostomy g a via the administration tube 4. When air is continuously sent to the air chamber 1b and the middle upper portion of the nutrient container 2 is pressurized and compressed to push out the nutrient, the pressure sensor S2 and the timer in the second layer air chamber 1b are used to store the inside of the air chamber 1b. When it is detected that a certain time has passed after the air pressure has become a predetermined pressure, the control device 15 closes the open / close valve V2 and opens / closes the open / close valve V3 connected to the third-layer air chamber 1c. Is released. Then, in the same procedure, air is sequentially supplied to the air chambers 1c and 1d, and as shown in FIG. 4 (d), the nutrient container 2 is stored in the third and lowermost air chambers 1c and 1d. By compressing and compressing the middle lower part and the lowermost part corresponding to the air chambers 1c and 1d, all nutrients inside the nutrient container 2 are pushed out and supplied from the administration tube 4 to the gastrostomy a.

  When the pressure sensor S4 of the lowermost air chamber 1d and the timer detect that the pressure in the air chamber 1d has not changed for a certain time after the air pressure in the air chamber 1d reaches a predetermined pressure, the control device 15 Is closed, the open / close valve V4 is closed, and the air feeder 10 is stopped. Then, all the air chambers 1a, 1b, 1c are opened by pressing an exhaust button (not shown) provided in the control unit casing 15A and opening all the open / close valves V1-V4 including the exhaust valve V5 following the exhaust port. 1d is exhausted. Instead of pressing the exhaust button, the air feeder 10 may be stopped by the control device 15, and the exhaust valve V5 and the on-off valves V1 to V4 may be automatically opened.

  According to the nutrient administration device, it is possible to save the labor of the nurse pressing the nutrient storage container 2 manually for about 20 to 30 minutes for administration of the nutrient. Moreover, unlike the case where it is administered in the sense of a nurse when pressing by manual operation, it can be administered at a constant speed. Therefore, the optimal semi-solid nutrient can be administered to the patient without burdening the nurse for administration.

  Further, the nutrient solution container 2 is pressed and compressed sequentially from one end side to the other end side to reliably push out the nutrient solution inside the nutrient solution storage container 2, so that the nutrient solution remains in the nutrient solution storage container 2. There is nothing to do.

  When the nutrient solution storage container 2 is arranged in the storage unit 3, all the open / close valves V 1 to V 4 are opened, and all the air chambers 1 a to 1 d are inflated to some extent, from the extrusion port 7 of the nutrient solution storage container 2. When the opening and closing valves V1 to V4 are fully closed after the nutrient solution is about to be pushed out, and the administration operation is started in accordance with the procedure described above, when the opening and closing valves V1 to V4 are switched, the previous stage and the next stage There is no time lag in extruding the nutrient solution storage container 2 and it continues smoothly.

  Next, the air feeding mechanism may be configured as shown in FIG. That is, the air feed mechanism 100 ′ is a first branch pipe that branches from the air supply pipe 12 by connecting the uppermost air chamber 1 a located on one end side to the air feed device 10 via the air supply pipe 12. The branch pipe 12a is connected to a first opening / closing valve Va1 that opens when the pressure exceeds a predetermined first pressure, and the first opening / closing valve Va1 is connected to the air chamber 1b on the other end side adjacent to the air chamber 1a. Connecting. Similarly, a second open / close valve Va2 that opens when a second pressure equal to or higher than the first pressure is connected to a branch pipe 12b that is a second branch pipe branched from the branch pipe 12a, and a second open / close valve is provided. The valve Va2 is adjacent to the air chamber 1c on the other end side adjacent to the air chamber 1b. Similarly, a third open / close valve Va3 that opens when a third pressure equal to or higher than the first pressure is connected to a branch pipe 12c that is a third branch pipe branched from the branch pipe 12b, and a third open / close valve is provided. The valve Va3 is connected to the air chamber 1d on the other end adjacent to the air chamber 1c. By supplying air from the air feeding device 10 to the uppermost air chamber 1 a, the corresponding portion of the nutrient container 2 is pressurized and compressed to feed the nutrients inside to the administration means 4. The check valves 24a, 24a, 24a are provided downstream of the branch of the air supply pipe 12 with the branch pipe 12a and downstream of the first opening / closing valve Va1, the second opening / closing valve Va2, and the third opening / closing valve Va3, respectively. , 24a are arranged.

  The air chambers 1a, 1b, 1c, and 1d are provided with exhaust pipes 14a, 14b, 14c, and 14d, and the exhaust pipes are combined into a common exhaust pipe 14 and open to the exhaust port. The common exhaust pipe 14 is provided with an exhaust valve V5. Also in this case, check valves 24b, 24b, 24b, and 24b are disposed downstream of the exhaust pipes 14a, 14b, 14c, and 14d.

  The air supply pipe 12 is provided with a pressure sensor S, and the air feeding device 10, the pressure sensor S, and the exhaust valve V <b> 5 are connected to the control device 15.

  The first to third on-off valves Va1, Va2, Va3 provided in the air supply forward path to the air chambers 1b, 1c, 1d are provided as piston valves as shown in FIG. 5 (a). A supply port 13 is formed through the middle portion of the side wall of the valve cylinder 17, and a valve body 18 is slidably provided in the interior, and the valve body 18 is always positioned above by a spring 19 so that the supply port 13 is provided. Energized to close. 4 is an enlarged schematic view of the portion A in FIG. 4. The upper space 20 of the upper end opening 23 of the valve cylinder 17 is a branch pipe 12a branched from the air supply pipe 12, and the lower space 21 is branched. An air pipe 22a that leads from the pipe 12a to the air chamber 1b and a branch pipe 12b that leads to the second opening / closing valve Va2 are shown. The upper end open part 23 of the valve body 18 is disposed so as to open to the upper space 20 and the supply port 13 to open to the lower space 21. Then, when air is sent into the upper space 20 and the pressure rises to become the first pressure or higher, the valve body 18 descends as shown in FIG. When descending to a position beyond the opening 13, the upper end opening 23 and the supply opening 13 pass, so that the air in the upper space 20 is sent into the lower space 21. The supply of air continues until the pressure in the lower space 21 becomes substantially the same as that in the upper space 20. When the upper and lower spaces 20 and 21 become substantially equal in pressure, the valve element 18 rises again as shown in FIG.

  Next, control of the administration device for tube feeding nutrients by the air feed mechanism 100 'will be described together with its usage. First, similarly to the above-described administration device, the nutrient solution storage container 2 is hung on a stand hook or the like, and the nutrient solution storage container 2 is connected to the gastrostomy a of the patient. When the air feeding device 10 is operated by the control device 15 of the air feeding mechanism 100 ', air is fed from the air supply pipe 12 to the uppermost air chamber 1a located on one end side, so that the air chamber 1a expands. Then, the uppermost part of the nutrient container 2 is pressurized and compressed, and the internal tube nutrient is gradually pushed out from the extrusion port 7 on the other end side, and is introduced into the gastric fistula a through the administration tube 4. At this time, when air is sent to the air chamber 1a, the pressure in the air chamber 1a gradually increases, but when the nutrient is pushed out of the nutrient container 2 and the volume of the nutrient container 2 is reduced, The space in which the air chamber 1a can further expand by that amount is created, so that the internal pressure decreases. When the pressure sensor S detects this, the air feeder 10 is restarted to increase the pressure. As the pressure increases, the force for pressurizing the nutrient container 2 further increases, so that the nutrient container 2 is compressed and the nutrient is pushed out.

  In this way, when the internal pressure of the first air chamber 1a gradually increases and the air chamber 1a expands with air, and the top of the nutrient solution storage container 2 is almost crushed, the pressure is increased as shown in FIG. As shown in (b), the valve body 18 is pressed and lowered so that when the pressure becomes equal to or higher than a predetermined first pressure, the valve body 18 of the first on-off valve Va1 is placed between the upper end opening 23 and the second-layer air chamber 1b. The supply port 13 communicated with is communicated. For this reason, air is sent to the air chamber 1b of the second layer and the upper space of the second opening / closing valve Va2 via the valve body 18 through the branch pipe 12b and the air pipe 22a, and the uppermost part of the nutrient solution storage container 2 Then, the intermediate portion is pressurized and compressed, and the tube feeding nutrient inside is gradually pushed out from the extrusion port 7 and continuously supplied from the administration tube 4 to the gastrostomy a. When the pressure in the second-layer air chamber 1b also becomes the second pressure, the second opening / closing valve Va2 in the next stage is opened in the same manner as described above, and air is sent into the third-layer air chamber 1c. When the internal pressure of the air chamber 1c in the layer reaches the third pressure, the third open / close valve Va3 of the next stage is opened, and from the portion corresponding to the uppermost air chamber 1a located on one end side of the tube feeding nutrient container 2 The nutrients at the site corresponding to the lowermost air chamber 1d located on the other end side are sequentially pushed out. The pressure sensor S detects that the air pressures in all the air chambers 1a, 1b, 1c, and 1d have reached a predetermined pressure by sequentially opening the first to third on-off valves Va1, Va2, and Va3. Then, the air feeder 10 stops. As described above, air is sent to the air chamber 1a, and the first opening / closing valve Va1, the second opening / closing valve Va2, and the third opening / closing valve Va3 are opened to operate the air chamber 1b, the air chamber 1c, and the air chamber, respectively. Even when air is sent to 1d, the check valves 24a, 24a, 24a and 24a are provided, so that air already sent to the air chambers 1a, 1b, 1c and 1d may flow backward. As a result, the push-out of the nutrient is not hindered with the opening / closing operation.

  Thereafter, when it is determined that the extrusion of the nutrient has ended after a certain period of time, the air in the air chambers 1a, 1b, 1c, and 1d is automatically or manually opened so that the air in the exhaust pipes 14a, 14b, After being exhausted through 14c, 14d and 14, the open / close valves Va1, Va2 and Va3 are closed. Even during exhaust, exhaust gas sent from each of the exhaust pipes 14a, 14b, 14c, and 14d to the common exhaust pipe 14 is sent via the check valves 24b, 24b, 24b, and 24b, and therefore does not flow backward.

  Since the nutrient solution is also automatically administered by the nutrient solution administration device, it is possible to optimally administer the semi-solid nutrient to the patient without burdening the nurse for administration.

  Further, the nutrient solution container 2 is pressed and compressed sequentially from one end side to the other end side to reliably push out the nutrient solution inside the nutrient solution storage container 2, so that the nutrient solution remains in the nutrient solution storage container 2. There is nothing to do.

  6 includes an air supply pipe 12 that connects the exhaust pipes 14a, 14b, 14c, and 14d to the air chambers 1a, 1b, 1c, and 1d, and an air pipe 22a as a first branch pipe. In this embodiment, the air pipes 22b as the second branch pipe and the air pipe 22c as the third branch pipe are connected. In this case as well, the air pressures in all the air chambers 1a, 1b, 1c and 1d become equal to or higher than a predetermined pressure. When the pressure sensor S detects that the air feeding device 10 is stopped, the exhaust valve V5 is opened at the time when it is determined that the extruding of the nutrient has ended after a certain period of time has passed, so that all the air chambers are opened. 1a, 1b, 1c, and 1d are exhausted, and the open / close valves Vb1, Vb2, and Vb3 are closed, and the air and air chambers 1a, 1b supplied to the air chambers 1a, 1b, 1c, and 1d are closed. 1c The exhaust gas exhausted from 1d is configured not to flow back by the check valves 24a and 24b, respectively, so that it is not necessary to connect exhaust pipes to the air chambers 1a, 1b, 1c and 1d. Therefore, the structure becomes simple.

  Since each of the opening / closing valves Vb1, Vb2, and Vb3 opens and closes autonomously, the number of target members controlled by the control device 15 is small. Further, since the first to third on-off valves Vb1, Vb2, and Vb3 are autonomously opened and closed at a predetermined pressure, the pressure for opening and closing cannot be changed in real time, but FIG. If the spring 19 of the on-off valve Va1 shown in (b) has a structure that can be pressed by an adjusting screw (not shown), and the on-off pressure can be adjusted by changing the urging force of the spring 19 that presses the valve body 18. It becomes a pressure-adjustable open / close valve, and the speed of administration of the nutrient can be changed by variably adjusting the adjustment screw manually.

  Moreover, the air feeder 10 is not limited to the above-mentioned example. Other known mechanisms may be used.

  Further, the nutrient container 2 and the pressure bag 1 may be arranged in the horizontal direction without being arranged in the vertical direction. The pressure bag is not limited to a configuration in which a storage portion for storing the nutrient container 2 is provided at the center of the air chamber formed in a substantially annular shape. Any structure may be used as long as the nutrient container 2 can receive pressure from the pressurized bag. For example, a plurality of air chambers are laminated in a multilayer shape, and a presser material made of a net or cloth is stretched on one side surface, and the nutrient container 2 is stored between the stacked air chamber and the presser material. Also good.

  Furthermore, the air chamber of the pressure bag 1 is not limited to the example divided into four layers. Two, three or five or more layers may be used.

  In addition, the administration device according to the present invention is most effective when the tube feeding is a semi-solid nutrient having a high viscosity, but is not necessarily limited to a semi-solid, such as infusion. Can also be administered. Moreover, it is not limited to enteral nutrient. Furthermore, the administration means for administering the tube feeding agent is not limited to that administered to the gastrostomy. It may be administered from the nasal cavity or the oral cavity.

Overview of tube feeding device according to the present invention Schematic diagram of the above-mentioned tube feeding device (A)-(d) is nutrient solution administration mode explanatory drawing accompanying the sending of air Schematic diagram of other tube feeding device (A) (b) is an explanatory view of the operating principle of the piston valve Schematic diagram of another tube feeding device

Explanation of symbols

S1 to S4 Pressure sensors V1 to V4 Valves 1a to 1d Air chamber 2 Nutrient storage container 3 Storage section 4 Dosing means 10 Pneumatic feed device 15 Control device

Claims (4)

  A pressure bag having a plurality of independent air chambers that can be expanded and contracted by supplying and discharging air; a flexible nutrient container that is arranged to receive pressure by the pressure bag; and the pressure bag. An air feed mechanism for sequentially supplying air from an air chamber located on one end side to an air chamber located on the other end side, and sequentially feeding the nutrient solution storage container from one end side to the other end side by the air feed mechanism And an administration device for administering a nutrient that is pushed out from the other end side by compressing and compressing.   The air feed mechanism is connected to each of the open / close valves provided corresponding to each of the air chambers, a pressure sensor for detecting the pressure of each of the air chambers, and the open / close valve A control device for controlling the air supply, and the control device opens the open / close valve leading to the air chamber on the one end side to supply air from the air feeding device, and is provided corresponding to the air chamber on the one end side. When the pressure sensor detected detects a predetermined pressure, the open / close valve provided corresponding to the air chamber on the other end adjacent to the air chamber on the other end is opened to supply air. Item 4. A tube feeding device according to Item 1.   The air feeding mechanism includes an air feeding device connected to the air chamber located on the one end side via an air supply pipe, and the other end branched from the air supply pipe and adjacent to the air chamber located on the one end side. A first branch pipe connected to the air chamber on the side, and a first on-off valve provided in the middle of the path of the first branch pipe and opening when the pressure exceeds a predetermined first pressure. The administration device for tube feeding according to claim 1. The air feed mechanism is connected to the first branch pipe on the downstream side of the first opening / closing valve, and is adjacent to the air chamber on the other end side and on the other end side relative to the air chamber on the other end side. A second branch pipe connected to the air chamber located at
The tube feeding according to claim 3, further comprising a second on-off valve provided in the middle of the path of the second branch pipe and opening when the second pressure is equal to or higher than the first pressure. Drug administration device.

Images