JPH0653162B2 - Blood processing apparatus provided with blood collecting means - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides a blood recovery means for recovering blood in a human body by replacing blood remaining in a blood processing apparatus with air or physiological saline. A blood processing apparatus provided.

(Prior art and its problems) As blood processing devices, dialysis type artificial kidneys, filtration type artificial kidneys, artificial lungs, artificial livers, plasma separators, etc. are currently put into practical use. Blood is purified through a purifier and the like, and the treated blood is returned to the patient.

At that time, it is necessary to perform a blood collecting operation for returning 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, at the time of dialysis of an artificial kidney, the remaining blood is 10
Since it is 0 to 300 ml and the patient is originally in a state where the blood increasing function is deteriorated, it is desirable to return the residual blood to the body. To return such residual blood to the body, a method of sending air into the extracorporeal circulation circuit to push out the blood in the extracorporeal circulation circuit with air, and a method of using blood such as physiological saline that is physiologically close to body fluid There is a way to replace. At this time, it is dangerous if air is accidentally sent into the body.
Therefore, it is necessary to collect as much residual blood as possible without the air being sent into the body. Also, since excessive inflow of physiological saline into the body is not desirable, in the past, personnel monitored the flow of air and physiological saline flowing through the extracorporeal circulation circuit while at the same time adhering to the walls of the circuit and blood purifier. Various work for flowing blood (specifically, vibration is applied to the circuit or blood purifier, adjustment of flow path pressure, etc.)
The staff in charge are very focused and a great burden.

The inventors of the present invention have previously disclosed, as an apparatus having a function capable of reducing these artificial operations and automatically performing them, in Japanese Patent Laid-Open No. 58-1.
77658, JP-A-58-177659, JP-A-5
No. 8-177669 is filed.

(Object of the Invention) The present invention aims to further improve the above-mentioned three devices, 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 step, the needle on the artery side must first be removed and connected to a physiological saline bottle, and at the same time, hemostasis after removal of the needle must be performed, and the recovery is also performed. When the operation is completed, the venous needle is pulled out to stop the bleeding, which is a burden on the staff in that the bleeding work is performed twice. The present invention provides an apparatus having a function of performing blood stoppage work only once and collecting blood with any needle punctured by a patient.

(Structure of the Invention) A blood processing apparatus according to the present invention is a blood processing apparatus including an indwelling needle, a blood pump, a pressure gauge, a blood purifier, an air bubble sensor, and the like, and a circuit connecting them. And a blood purifier) (provided between the blood pump) and a bypass circuit that connects the front and rear of the blood pump. The bypass circuit has two replenisher bottles, an emptying sensor, and two circuits for adjusting the flow between the blood pump and the circuit section before and after the blood pump. It is characterized in that a clamp is arranged and a blood pump capable of rotating in the reverse direction is used as the blood pump.

(Embodiment and Function) Next, one embodiment of the device of the present invention will be described with reference to the drawings in the case of using physiological saline as a replenisher to replace the residual blood.

In the figure, a patient's artery is punctured with a needle (1) and an arterial circuit (2) is connected to the needle, and the arterial circuit (2) passes through a clamp (3), a blood pump (4) and a clamp (5), and a drip chamber. (6), blood purifier (7), clamp (8), drip chamber (9), clamp (1
0), the bubble sensor (11) and the venous circuit (12) to connect to the venous needle (13). (14) is a bypass circuit connecting the circuits before and after the blood pump (4), in which a saline solution bottle (17), an emptying sensor (18), and clamps (14) and (15) are arranged. ing.

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 the venous circuit (12) and the venous needle. Blood is returned to the patient via (13).

After the blood processing is completed, the collection of blood remaining in the device is started. With this device, residual blood can be collected while the patient is pierced with the arterial needle (1) and the venous needle (13). In collecting blood, first, the clamp (3) is opened, the clamp (15) is closed, the clamp (16) is opened, and the clamp (5) is opened.
Closed, other clamps open, blood pump (4)
By reversely rotating the saline solution from the saline solution bottle (17) arranged in the bypass through the emptying sensor (18), the clamp (16), the blood pump (4), and the clamp (3) to the arterial needle (1). ) From the patient's blood vessel, and the blood remaining in the circuit between them is returned to the patient's blood vessel from the arterial side.

Next, the clamp (3) is closed, the clamp (15) is opened, the clamp (16) is closed, the clamp (5) is opened, the clamp (8) is opened, the clamp (10) is opened, and the blood pump (4) is opened. ) Rotate in the opposite direction, that is, rotate normally,
The saline solution is used for emptying sensor (18), clamp (1
5), blood pump (4), clamp (5) 3 drip chamber (6), blood purifier (7), clamp (8),
A drip chamber (9), a clamp (10), a bubble sensor (11), a venous circuit (12), and a venous needle (1).
3) to flow into the patient's blood vessel, and 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 of clamps, operation of pumps, and introduction of replenisher in this device can all be performed automatically. For example, the reverse rotation time and the normal rotation time of the blood pump are set by a timer or the like. When the saline solution in the saline solution bottle (17) is exhausted, the emptying sensor (18) senses this and sends a command so that air does not enter the bypass circuit (14), and the clamp (15) and Close (16). When the bubble sensor (11) detects a bubble, it immediately sends a command to the clamp (10) to close the clamp and prevent the bubble from flowing into the circuit (12).

When the collection of the residual blood is completed, the arterial needle (1) and the venous needle (13) are pulled out at the same time, and hemostasis work is performed.

(Effects of the Invention) Compared to the conventional device, this device does not require joining work between the replenishing liquid bottle and the indwelling needle, and only requires one hemostatic work, so that blood can be collected cleanly and more automatically. You can

[Brief description of drawings]

The attached drawings show an example of the device of the present invention, and are explanatory views of its usage. 1 ... Arterial needle, 10 ... Clamp, 2 ... Arterial circuit, 11 ... Bubble sensor, 3 ... Clamp, 12 ... Vein circuit, 4 ... Blood pump, 13 ... Vein needle, 5 ... Clamp, 14 ... Bypass circuit 6 ... Drip chamber, 15 ... Clamp 7 ... Blood purifier, 16 ... Clamp 8 ... Clamp, 17 ... Saline bottle (replenisher bottle) 9 ... Drip chamber, 18 ... Empty Pull sensor

Claims (1)

[Claims] 1. A blood processing apparatus comprising an indwelling needle, a blood pump, a pressure gauge, a blood purifier, an air bubble sensor, and the like, and a circuit connecting these, in the circuit (placed between the indwelling needle and the blood purifier). A bypass circuit connecting the front and rear of the blood pump is provided, and the bypass circuit adjusts the flow between the replenisher bottle, the emptying sensor, and the circuit section before and after the blood pump.
A blood processing apparatus provided with a blood collecting means, in which individual clamps are arranged, and a blood pump capable of reverse rotation is used as a blood pump.