JPS63139558A - Blood treatment apparatus equipped with blood recovery means - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides a blood collection means for recovering blood remaining in a blood processing device into a human body by replacing it with air or physiological saline. The present invention relates to a blood processing apparatus equipped with a blood processing apparatus.

(Prior art and its problems) Blood processing devices currently in practical use include dialysis-type artificial kidneys, filtration-type artificial kidneys, artificial lungs, artificial livers, and plasma separators. The blood is purified through a purifier, etc., and the processed blood is returned to the patient.

At that time, it is necessary to perform a blood recovery operation to return blood remaining in a so-called extracorporeal circulation circuit, such as a blood purifier and a blood circuit connecting the blood purifier to the patient, into the patient.

For example, during dialysis with an artificial kidney, the remaining blood is 10
0 to 300 mJl, and since the patient's blood augmentation function is already in a state of decline, it is desirable to return the remaining blood to the body.To return such residual blood to the body, extracorporeal air circulation is There are two methods: one method is to send blood into the extracorporeal circulation circuit and flush it away with air, and the other method is to replace the blood with a fluid physiologically similar to body fluids, such as physiological saline.

At this time, it is dangerous if air is accidentally pumped into the body. Therefore, it is necessary to collect as much remaining blood as possible without air being pumped into the body. Additionally, it is undesirable for excessive physiological saline to flow into the body, so in the past, staff members monitored the flow of air and saline flowing through the extracorporeal circulation circuit, while at the same time monitoring the walls of one circuit and the blood purifier. They perform various tasks (specifically, applying vibration to the circuit or blood purifier, adjusting the internal pressure of the flow path, etc.) to drain the blood that is attached to the blood, and the staff in charge of this work require a great deal of concentration. It's a big burden.

The present inventors previously developed a device in Japanese Unexamined Patent Application Publication No. 58-111 as a device equipped with a function that can reduce these manual tasks and perform them automatically.
No. 77658, JP-A-58-177659, JP-A-Sho 5
No. 8-177669 has been filed.

OBJECTS OF THE INVENTION The present invention aims to further improve the three devices described above and, in particular, to achieve more complete automation in blood collection. That is,
In each of the above-mentioned prior inventions, at the start of the blood collection process, the needle on the artery side must first be removed and connected to a saline bottle, and at the same time, the hemostasis must be performed after the needle is removed. When the bleeding is finished, the needle on the vein side is removed to stop the bleeding, which is a burden on the staff as it involves stopping the bleeding twice.With the present invention, the bleeding can be stopped only once, and it is possible to stop the bleeding twice. The present invention provides a device that has the function of collecting blood while the needle remains stuck in the patient.

(Structure of the Invention) The blood processing device of the present invention includes an indwelling needle, a blood pump, a pressure gauge, a blood purifier, a bubble sensor, etc., and a circuit connecting these. A bypass circuit is provided to connect the front and back of the blood pump (disposed between the blood pump and the blood purifier), and the bypass circuit includes a replenisher bottle,
It is characterized in that an empty sensor and two clamps are arranged to adjust the flow between the circuit parts before and after the blood pump, and furthermore, a blood pump that can be rotated in reverse is used as the blood pump.

(Embodiments and Effects) Next, an embodiment of the device of the present invention will be described with reference to the drawings in the case where residual blood is replaced using physiological saline as a replenishing fluid.

In the figure, a needle (1) is inserted into the patient's artery, an arterial circuit (2) is connected to the needle, and the arterial circuit (2) is connected to a clamp (
3), blood pump (4), clamp (5), drip chamber (6), blood purifier (7), clamp (8)
), drip chamber (9), clamp (10),
% foam sensor (11), connected to the intravenous needle (13) via the intravenous circuit (12). (14) is a blood pump (4
) is a bypass circuit that connects the circuits before and after the circuit, and this circuit is equipped with a saline bottle (17), an empty sensor (18), and clamps (14) and (15).

Blood drawn from the patient through the arterial needle (1) and the arterial circuit (2) by the rotation of the blood pump (4) is processed by the blood purifier (7), and then transferred to the venous circuit (12) and the venous circuit. Blood is returned to the patient via the needle (13).

After blood processing is completed, the blood remaining in the device begins to be collected. With this device, the remaining blood can be collected while the arterial needle (1) and venous needle (13) remain stuck in the patient. To collect blood, first open the clamp (3) and then tighten the clamp (3).
15) is closed, clamp (16) is open, clamp (5) is closed, and the other clamps are open, the blood pump (4) is reversely rotated and the saline bottle (1) placed in the bypass is opened.
7), physiological saline flows into the patient's blood vessel from the arterial needle (1) via the air suction sensor (18), the clamp (16), the blood pump (4), and the clamp (3), and the remaining in the circuit between The blood that was being drained is returned from the artery side into the patient's blood vessel.

Next, close the clamp (3), open the clamp (15), close the clamp (16), open the clamp (5), and then close the clamp (15).
8), open the clamp (10), and open the blood pump (
4) in the opposite direction to the previous one, that is, rotate it normally, and drain the saline by emptying the sensor (ta), clamp (15),
Blood pump (4), clamp (5), drip chamber (6), blood purifier (7), clamp (8), drip chamber (9), clamp (10), air bubble sensor (11), venous circuit (12) ) through the venous needle (13) into the patient's blood vessel, and the blood remaining in the circuit between them is returned from the vein side into the patient's blood vessel.

Operations such as opening and closing the clamp, operating the pump, and introducing the replenisher in this device can all be performed automatically. For example, the reverse rotation time and forward rotation time of the blood pump are set by a timer or the like.

The empty sensor (18) detects when the saline bottle (17) runs out of saline and activates the bypass circuit (
Send a command to close the clamps (15) and (16) to prevent air from entering 14). Air bubble sensor (11)
When detecting air bubbles, it immediately sends a command to the clamp (lO) to close the clamp and prevent air bubbles from flowing into the circuit (12).

When the collection of the remaining blood is completed, the arterial needle (1) and the venous needle (13) are removed at the same time to stop the bleeding.

(Effects of the invention) Compared to conventional devices, this device does not require the work of connecting the replenisher bottle and the indwelling needle, and only requires one hemostasis work, so blood can be collected more cleanly and automatically. I can do it.

[Brief explanation of the drawing]

The accompanying drawings show one example of the device of the present invention and are explanatory diagrams of its usage. 1. Arterial needle 10. Clamp 2, arterial circuit
11. Air bubble sensor 3, clamp 1
2. Venous circuit 4, blood pump 13. Intravenous needle 5, clamp 14. Bypass circuit 6, drip chamber 15. Clamp 7, blood purifier 1
6. Clamp 8o clamp 17. Physiological saline bottle 9, drip chamber (replenisher bottle) 18
, empty sensor

Claims (1)

[Claims] (1) In a blood processing device consisting of an indwelling needle, a blood pump, a pressure gauge, a blood purifier, a bubble sensor, etc., and a circuit connecting these, the circuit is placed in the circuit (placed between the indwelling needle and the blood purifier). A bypass circuit is provided that connects the front and rear of the blood pump, and the bypass circuit is equipped with a replenisher bottle, an empty sensor, and two clamps that adjust the flow between the front and rear circuits of the blood pump. A blood processing device equipped with a blood collection means, characterized in that a rotatable blood pump is used.