JPH0628115Y2 - Manual pump for extracorporeal circulation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a manual pump incorporated into an extracorporeal blood circulation device, and more specifically, for example, when resuscitating a cardiac arrest patient by a venous / arterial bypass method. The present invention relates to a manual pump for extracorporeal circulation that is used by incorporating it into a blood extracorporeal circulation resuscitation device or the like.

[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 for circulating blood.

By the way, as a pump used in a conventional extracorporeal circulation device, for example, a roller type pump as shown in FIG. 6 is generally adopted. As shown in the figure, this pump has a plurality of rollers 2 arranged in a cylindrical wall surface 1 so as to rotate along the wall surface 1, and each roller 2 is rotated while squeezing a wheel fluid 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, blood can be circulated. However, the conventional pump 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.

[Means for Solving the Problems]

In order to achieve the above object, a manual pump for extracorporeal circulation according to the present invention is made of an elastic material and has an elastic bag having a liquid storage chamber formed therein, and an elastic bag formed at one end of the bag so as to communicate with the storage chamber. Liquid suction port, a liquid feed port formed at the other end of the bag in communication with the chamber, a restoring means for self-restoring (expanding) the bag, and attached to the liquid suction port side and into the chamber. It has a one-way valve that allows liquid to flow and a one-way valve that is attached to the liquid delivery port side and that allows liquid to flow only to the outside of the room.The elastic bag should be held by hand and compressed almost entirely. It is formed in a cylindrical shape having a size capable of being formed, and the restoring means is constituted by an annular elastic repulsive collar-like body formed integrally with the bag so as to integrally project on the substantially central outer peripheral wall surface of the bag. It is a feature.

[Action]

In the manual pump for extracorporeal circulation configured as described above, when the elastic bag is grasped and pressed by the hand, the valve on the suction port side of the bag is closed and the valve on the delivery port side is opened, so that the liquid in the accumulation chamber does not flow. It is delivered to the outside from the liquid delivery port and supplied to a predetermined part. Also,
When the bag is released from compression, the bag self-expands (at this time, the valve on the liquid supply side of the bag closes and the valve on the liquid intake side opens)
Then, since the accumulation chamber is in a vacuum (negative pressure) state, the amount of liquid corresponding to the delivered amount is sucked into the chamber through the liquid suction port.

Therefore, the liquid can be circulated in a predetermined direction by repeatedly pressing the bag. 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 for extracorporeal circulation according to the present invention will be described below with reference to FIGS. 1 to 5.

FIG. 1 is a side view with a part cut away, FIG. 2 is a sectional view taken along the line II of FIG. 1, and FIG. 3 is a longitudinal sectional view of a one-way valve.

1 to 3, the manual pump for extracorporeal circulation of this embodiment has a liquid accumulating chamber having an appropriate volume inside.
An elastic bag 11 formed in 12, a liquid suction port 13 formed at one end of the bag 11, and a liquid supply port 14 formed at the other end of the bag 11,
It comprises a restoring means 15 for self-restoring (expanding) the bag 11, a one-way valve 16 attached to the liquid suction port 13 side, and a one-way valve 17 attached to the liquid delivery port 14 side.

The elastic bag 11 is made of silicone rubber-based, urethane rubber-based, vinyl-based, or other resin, and has both ends of a cylindrical portion 18 formed to a size that an average person can hold with his / her hand and compress the entire body. It is configured to be conically narrowed.

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 so as to communicate with the chamber 12, respectively, and in the embodiment, short pipes 19 and 19 are respectively extended at the tips of the narrowed portions at both ends of the cylindrical portion 18, and one short pipe is formed. Suction mouth at tube 19 1
3, the other short pipe 19 forms the liquid supply port 14.

The restoring means 15 is formed by projecting an annular elastic repulsive collar-shaped body 20 on the substantially central outer peripheral wall surface of the cylindrical portion 18 of the bag 11. As a result, the bag 11 is self-expanded and restored by the elastic force of the collar body 20. In this embodiment, one flange 20 is formed, but the flange 20 may be provided with a plurality of protrusions (two protrusions in the figure) as shown in FIG.

The one-way valves 16 and 17 are valves (check valves) for allowing liquid (blood) to flow in one direction and preventing backflow. In the embodiment, the valves 16 and 17 have the same structure. And the third
As shown in detail in the drawing, on the central axis of the housing member 22 in which a ball accommodating chamber 23 for accommodating the ball 21 is provided, joint port pipes 24, 25 communicating with the chamber 23 are symmetrically projected to form a liquid inlet / outlet port 26. , 27 are formed to face each other, and a plurality of engaging projection pieces for engaging the ball 21 near one entrance 27 of the accommodation chamber 23
It is made up of 28 protruding parts. As a result, since the ball 21 engages with the protrusion 28 and the opening 27 is always opened, the liquid freely flows from the mouth pipe 24 in the direction of 25, but for the flow in the opposite direction, the chain line in FIG. As shown in the figure, the inlet / outlet port 26 is closed by the ball 21, so that it is configured to prevent backflow.
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. In short, the object can be achieved if the liquid is made to flow only in one direction and the backflow is prevented.

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 9 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.

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

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

FIG. 5 shows a state in which the manual pump of the present invention is used by being incorporated in an extracorporeal blood circulation resuscitation device. In the figure, 30
Is an artificial lung, and the artificial lung 30 has a blood inlet 33 of the lung 30 connected to a valve 17 on the side of the liquid supply port 14 of the bag 11 via a connecting pipe 31 and a connector 32. 34 is the artery of patient 35 and blood outlet of oxygenator 36
The blood vessel 34 is a blood vessel connecting the blood vessel, and the blood vessel 34 is formed by connecting the blood feeding catheter 37 and the blood feeding tube 38 with the connector 42.
The proximal end of 38 is connected to the outlet 36 of the oxygenator 30. 39 is patient
In the devascularization route that connects 35 veins and the suction port 13 of the bag 11,
The conduit 39 is formed by connecting a blood removal catheter 40 and a blood removal tube 41 with a connector 42, and the proximal end of the tube 41 is connected to the mouth tube 24 of the one-way valve 16 on the liquid suction side of the bag 11. 43 is an oxygen cylinder, and the cylinder 43 is connected to the gas inlet 44 of the artificial lung 30. As a result, oxygen gas is press-fitted into the artificial lung 30 through the inlet 44 to exchange blood gas, and is exhausted through the gas outlet. 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 40 and the distal end of the blood supply catheter 37 are inserted into the femoral vein and femoral artery of the patient by a puncture method or the like,
An extracorporeal blood bypass circuit of the vein and artery is formed.
Although the air in the bypass circuit has been removed, the description of the removal method is omitted.

Therefore, in the above-mentioned state, the bag 11 is grasped by hand, and venous blood is circulated extracorporeally by repeatedly performing compression, and gas exchanged in the oxygenator and oxygenated blood are returned to the arteries,
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) The bag does not have to be thick overall, and the bag is self-restoring with the ring-shaped elastic repulsive collar formed on the outer wall of the center of the center of the bag. Can be done. Therefore, the fatigue of the practitioner can be reduced.

(3) Since the pressing operation can be performed with the collar-shaped body sandwiched between the fingers, the bag does not slip during the operation. Therefore, the pressing operation of the bag can be performed stably and smoothly.

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

(5) Since the configuration is simplified, it is possible to mass-produce at low cost, and it is possible to provide an optimal pump for disposable use.

[Brief description of drawings]

1 to 3 show one embodiment of a manual pump for extracorporeal circulation according to the present invention. FIG. 1 is a side view with a part cut away, and FIG. 2 is I- of FIG. A sectional view taken along line I, FIG. 3 is a longitudinal sectional view of the one-way valve, FIG. 4 is a side view showing another embodiment of the present invention, and FIG. 5 is an explanatory view showing one example of a use state, FIG. 6 is a front view showing an example of a conventional pump. 11 …… Elastic bag 12 …… Liquid accumulation chamber 13 …… Liquid inlet 14 …… Liquid inlet 15 …… Restoring means 16, 17 …… One-way valve 20 …… Elastic repulsive collar

Claims (1)

[Scope of utility model registration request] 1. An elastic bag made of an elastic material, the inside of which is formed into a liquid storage chamber, a liquid suction port formed at one end of the bag so as to communicate with the storage chamber, and the above-mentioned other end of the bag. A liquid sending port formed in communication with the chamber, a restoring unit for self-restoring (expanding) the bag, a one-way valve attached to the liquid suction port side for flowing the liquid only into the chamber, and the liquid sending unit. It is attached to the mouth side and has a one-way valve that allows the liquid to flow only to the outside, and the elastic bag is formed into a cylindrical shape having a size that can be held by a hand and pressed almost entirely. The manual pump for extracorporeal circulation is characterized in that the means is composed of an annular elastic repulsive collar-shaped body integrally formed with the bag on the outer peripheral wall surface of the center of the bag so as to project integrally.