JPH0628116Y2 - Manual pump device for extracorporeal circulation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a manual pump device used by being incorporated in an extracorporeal blood circulation device, and more specifically, for example, resuscitating a cardiac arrest patient by a venous / arterial bypass method. A manual pump device that is used by incorporating it into a blood extracorporeal circulation resuscitation device used at the time, more specifically, it is inserted in a blood extracorporeal bypass circuit that connects human veins and arteries outside the body to circulate blood extracorporeally. The present invention relates to a manual pump device for extracorporeal circulation that inhales venous blood and supplies it to the arterial side.

[Conventional technology]

Conventionally, chest compression patient massaging has generally been adopted for resuscitation of a cardiac arrest patient. There is no doubt about the effectiveness and importance of the heart massage method, but this resuscitation method tends to interrupt the supply of oxygen to the brain, so even if the heart beats again It was not uncommon for an unrecovered brain to die or become a plant human.

Therefore, effective blood circulation as soon as possible is an essential requirement for resuscitation of patients with cardiac arrest, especially for brain resuscitation. For that purpose, extracorporeal circulation of blood is effective, and it has been proved in many cases. This extracorporeal circulation method (venous
The arterial bypass method is a method of forming a bypass circuit that connects a vein and an artery outside the body to circulate blood extracorporeally, remove carbon dioxide from venous blood, add oxygen (gas exchange), and return it to the artery. The device is equipped with an artificial lung for gas exchange of blood and a pump device for circulating blood.

By the way, as a pump device used in a conventional extracorporeal circulation device, for example, a roller type pump device as shown in FIG. 6 is generally adopted. As shown in the figure, this pump device has a plurality of rollers 2 arranged in a cylindrical wall surface 1 so as to rotate along the wall surface 1, and rotates each roller 2 while squeezing the infusion tube 3 with the rollers 2. Then, as shown by the arrow in the figure, the blood is sequentially fed in a predetermined direction.

[Problems to be solved by the device]

According to the above conventional pump device, blood can be circulated. However, the conventional device has the following problems.

(A) Since the tube is crushed by the roller, the tissue in the blood may be destroyed.

(B) Since it is a motor drive, it cannot be used in places without electrical wiring (outdoors, inside vehicles, etc.).

(C) Since the motor is built in, it becomes heavy and inconvenient to carry.

The present invention has been made in view of the above points, and an object thereof is to solve the above-mentioned problems (a) to (c) of the conventional technique and to carry out mass production at a low cost. To provide a device.

[Means for Solving the Problems]

In order to achieve the above object, a manual pump device for extracorporeal circulation according to the present invention has an elastic bag pressure-sensitive liquid suction / delivery pump and a pressurizer for manually operating the pump. An elastic bag made of a material, the inside of which is formed into a liquid storage chamber, a liquid suction port is formed at one end of the chamber, and a liquid supply port is formed at the other end; and a restoring means for self-restoring (expanding) the bag, A one-way valve that is installed on the liquid suction port side and allows the liquid to flow into the storage chamber only; and a one-way valve that is installed on the liquid supply port side and that allows the liquid to flow out only to the outside of the storage chamber, The pressurizer comprises a pressurizer main body formed by hingedly opening and closing a pair of pressurizing plates for holding and pressurizing the bag. It is characterized in that the pressure plate is manually pressed to pressurize the bag. Than it is.

[Operation] The manual pump device for extracorporeal circulation configured as described above,
The elastic bag is squeezed by manually pressing both pressure plates of the pressurizer together. When the bag is pressed, the valve on the liquid inlet side of the bag is closed and the valve on the liquid inlet side is opened, so that the liquid in the accumulation chamber is delivered from the liquid outlet to the outside and is supplied to a predetermined portion. Then, when the pressure on the bag is released, the bag self-expands (at this time, the valve on the liquid delivery side of the bag is closed and the valve on the liquid suction side is opened), and the inside of the accumulation chamber is in a vacuum (negative pressure) state. Therefore, the amount of the liquid corresponding to the delivered amount is sucked into the room through the liquid suction port.

Therefore, the liquid can be circulated in a predetermined direction by repeatedly pressing both pressure plates. Further, since the liquid is pushed out by the pressing force of the bag, the problem of blood tissue destruction as described in the prior art does not occur.

〔Example〕

An embodiment of a manual pump device for extracorporeal circulation according to the present invention will be described below with reference to FIGS. 1 to 8.

1 is a front view of the entire apparatus, FIG. 2 is a rear view of the same, FIG. 3 is a side view of the same, FIG. 4 is a bottom view of the same, and FIG. 5 is a vertical sectional view of a liquid suction / feed pump. FIG. 6 is a longitudinal sectional view of the one-way valve.

1 to 6, the apparatus of this embodiment comprises a liquid suction / delivery pump A of an elastic bag pressurizing type and a pressurizer B for manually operating the pump A.

The pump A has an elastic bag 11 whose inside is formed in a liquid accumulating chamber 12 having an appropriate volume, a liquid suction port 13 is formed at one end of the chamber 12, and a liquid supply port 14 is formed at the other end. Restoration means 15 for restoring (expanding) and one-way valve mounted on the side of the liquid suction port 13
16 and a one-way valve 17 attached to the liquid supply port 14 side.

The elastic bag 11 is made of an elastic resin material such as silicone rubber, urethane rubber, vinyl or the like, and has both ends of a cylindrical body 18 formed into an appropriate size, and a liquid suction port 13 at one end. , And a liquid feed port 14 is formed at the other end.

The volume of the storage chamber 12 of the bag 11 is set appropriately for adults and children (small for children).

The liquid suction port 13 and the liquid feed port 14 are formed in communication with the chamber 12, respectively, and in the embodiment, short tubes 19 and 19 are respectively extended at the ends of the narrowed portions at both ends of the cylindrical portion 18, The short pipe (19) forms the liquid suction port (13) and the other short pipe (19) forms the liquid feed port (14).

The restoring means 15 is formed by projecting an annular elastic repulsive collar-like body 20 on the outer peripheral wall surface of the center of the cylindrical portion 18 of the bag 11. As a result, the bag 11 is self-expanded and restored by the elastic reaction force of the collar body 20. In this embodiment, the collar-shaped body 20 is illustrated as a single strip, but the collar-shaped body 20
As shown in FIG. 7, it is possible to project a plurality of lines (three lines in the figure). When a plurality of collar-shaped bodies 20 are formed, as described later, the pressure plate of the pressure device B is pressed. Also, the collar engaging hole is formed correspondingly.

The one-way valves 16 and 17 are valves (check valves) that allow liquid (blood) to flow in one direction and prevent backflow. In this embodiment, both valves 16 and 17 have the same structure. As shown in detail in FIG. 6, the joint mouth pipes 24, 25 communicating with the chamber 23 are symmetrically arranged on the central axis of the housing member 22 in which the ball containing chamber 23 for containing the ball 21 is formed. The liquid inlets and outlets 26 and 27 are formed so as to face each other so as to face each other, and a plurality of engaging protrusions 28 that engage with the balls 21 are provided near one outlet 27 of the storage chamber 23. By this, the doorway
In 27, the ball 21 engages with the protruding piece 28 and is always opened, so that the liquid flows freely from the mouth tube 24 toward the mouth tube 25.
As for the flow in the reverse direction, the inlet / outlet port 26 is blocked by the ball 21 as shown in the phantom line in FIG. 6, so that the backflow is prevented. The one-way valves 16 and 17 are not limited to the structure of the embodiment.A ball valve system other than the embodiment, a system using a membrane valve, or any other structure can be freely selected. It is possible to adopt it as the main point, if the liquid is made to flow only in one direction and the back flow is blocked,
It can achieve the purpose.

Further, in this embodiment, the short tube on the liquid suction port 13 side of the bag 11
19 to the mouth pipe 25 of the one-way valve 16 and the short pipe 19 on the side of the liquid supply port 14
To the mouth tube 24 of the one-way valve 17 so that both valves 16 and 17 are
Is configured to connect to. In this case both valves 16, 17
May be integrated with the bag 11.

The pressurizer B includes a pressurizer main body 30 formed by hingedly opening and closing a pair of pressurizing plates 31 and 32 for sandwiching and pressurizing the cylindrical body 18 of the bag 11. Both pressure plates 31 and 32 are made of aluminum alloy, plastics, or the like, and are formed in such a size that the cylindrical body 18 of the bag 11 can be clamped and pressed as a whole.

At the position where the bag 11 of the both pressure plates 31 and 32 is held,
A long hole-shaped collar engaging hole 34 for engaging the collar-shaped body 20 is formed. As a result, the cylindrical body 18 of the bag 11 is stably held between the plates 31 and 32, and the bag 11 is pressed during the pressing operation of the bag 11.
It is designed to prevent the movement of the disc. in this case,
The collar engaging hole 34 is provided corresponding to the collar-shaped body 20 of the bag 11. In the embodiment, both the pressure plates 31, 32 are provided with the collar engaging hole 34 so as to correspond to the bag 11 shown in FIG. It is shown that three of each are formed.

Reference numerals 35 and 35 denote engagement guide rods attached to both sides of the upper pressure plate 31 downwardly by attachment pieces 36. Both guide rods 35 sandwich the short pipe 19 of the bag 11 to engage with each other. Book stick 35
It is made of A and 35A. As a result, the bag 11 can be stably placed stationary at a fixed position during the opening / closing operation of both pressure plates 31 and 32.

As described above, the bag 11 is stably locked at a fixed position by the engagement between the collar engaging holes 34 of both pressure plates and the collar-like body 20 and the engagement of the guide rod 35 and the short tube. Both pressure plates 31, 32 are opened and closed.

It should be noted that, if desired, a spring having an appropriate spring pressure is interposed between the pressure plates 31 and 32, and the spring action of this spring is configured to apply a restoring force to the plates 31 and 32 in the opening direction. May be.

Reference numeral 37 denotes an operating handle fixedly attached to the center of the upper surface of the pressure plate 31 on the upper side with a screw or the like, and 38 denotes an operating handle attached to the center of the lower surface of the pressure plate 32 on the lower side by a screw or the like. This is provided to press the bag 11 (close both plates 31, 32) by grasping both the operating levers 37, 38 by hand.

In addition, in the drawings, the parts denoted by the same reference numerals indicate the same components.

The manual pump device for extracorporeal circulation of the embodiment is configured as described above, and one example of its usage and operation will be described below with reference to FIG.

FIG. 8 shows a state in which the manual pump device of the present invention is used by being incorporated in an extracorporeal blood circulation resuscitation device. In the figure, 40 is an oxygenator, and the oxygenator 40 is a connecting pipe 41 and a connector 42.
Through the blood inlet 43 of the lung 40 through the valve on the side of the liquid supply port 14 of the bag 11
It is connected to 17. Reference numeral 44 is a blood supply path connecting the artery of the patient 45 and the blood outlet 46 of the artificial lung 40, and the conduit 44 is a blood supply catheter.
47 and a blood supply tube 48 are connected by a connector 52, and the proximal end of the tube 48 is connected to the outlet 46 of the oxygenator 40. 49
Is a blood removal line connecting the vein of the patient 45 and the liquid suction port 13 of the bag 11, and the line 49 is formed by connecting a blood removal catheter 50 and a blood removal tube 51 with a connector 52.
It is connected to the mouth pipe 24 of the one-way valve 16 on the liquid suction side of 11. 53 is an oxygen cylinder, and the cylinder 53 is connected to the gas inlet 54 of the oxygenator 40. As a result, oxygen gas is pressed into the artificial lung 40 from the inlet 54 to exchange blood gas, and is exhausted from the gas outlet 55. The gas that exchanges gas with blood may be air, but the description thereof is omitted here. Then, the distal end of the blood removal catheter 50 and the blood supply catheter
The tip of 47 is inserted into the femoral vein and femoral artery of the patient by a puncture method or the like to form an extracorporeal blood bypass circuit for the vein and artery. Although the air in the bypass circuit has been removed, the description of the removing method is omitted.

Therefore, in the above-mentioned state, the venous blood is circulated extracorporeally by grasping both gripping rods 37 and 38 of the pressurizer B by hand and repeatedly pressing the bag 11, and gas exchange is performed in the artificial lung, and oxygen is added. Blood can be returned to the arteries and this available blood can be sent to the brain, heart and other organs.

[Effect of device]

The present invention is configured as described above, and the present invention has the following effects.

(1) Since the blood is pushed out by the pressing force of the bag, the problem of destroying the blood tissue of the conventional roller type pump is solved.

(2) Since the bag is clamped by the pair of pressure plates and the both plates press the bag to compress the bag, the pressing operation of the bag can be performed smoothly and easily. Therefore, the fatigue of the practitioner can be reduced.

(3) Since it is lightweight, it is convenient to carry, and since it is a manual type, it can be used even in places where there is no electrical wiring.

[Brief description of drawings]

1 to 5 show an embodiment of a manual pump device for extracorporeal circulation according to the present invention, in which FIG. 1 is a front view and FIG.
The drawing is a rear view, FIG. 3 is a side view, FIG. 4 is a bottom view, FIG. 5 is a vertical sectional side view of a liquid suction / feed pump, and FIG. 6 is a vertical sectional view of a one-way valve. FIG. 8 is a front view showing another embodiment of the elastic bag, FIG. 8 is an explanatory view showing one example of a usage state, and FIG. 9 is a front view showing one example of a conventional manual pump device for extracorporeal circulation. Is. A ... Liquid suction / feed pump B ... Pressurizer 11 ... Elastic bag 12 ... Liquid storage chamber 13 ... Liquid inlet 14 ... Liquid inlet 15 ... Restoration means 16, 17 ... One-way valve 20 …… Elastic repulsive collar 30 …… Pressurizer body 31, 32 …… Pressure plate

Claims (1)

[Scope of utility model registration request] 1. An elastic bag pressurizing type liquid suction / feed pump, and a pressurizer for manually operating the pump, wherein the pump is made of an elastic material, and the inside is formed into a liquid accumulating chamber, An elastic bag having a liquid suction port at one end of the chamber and a liquid feed port at the other end, a restoring means for self-restoring (expanding) the bag, and a liquid suction port side interposed between the elastic bag and the storage chamber only. A one-way valve that allows the inflow of liquid, and a one-way valve that is interposed on the liquid delivery port side and that allows the outflow of the liquid only to the outside of the accumulation chamber, and the pressurizer comprises: It comprises a main body of a pressurizer which is formed by hingedly opening and closing a pair of pressurizing plates for holding and pressing the bag, and presses the both pressurizing plates manually to pressurize the bag. A manual pump device for extracorporeal circulation, characterized in that