JPH06142200A - Automatic transfusion device - Google Patents

Abstract

PURPOSE:To enable continuous and precision transfusion over a long time by using a bidirectional cylinder pump having a cylinder having front end apertures respectively on both right and left sides of a sliding piston and executing injection on the one side while suction is executed on the other side. CONSTITUTION:The bidirectional cylinder pump 1 is penetrated with a shaft with the piston 10 in its longitudinal direction. The piston 10 is slid back and forth within the cylinder when an actuator 40 slides back and forth. The aperture 12a, 12b are provided at the both front end parts of the piston on the cylinder. The left side of the piston 10 attains the injection state and one-way valve 14a is opened, thereby the medicinal liquid or blood in the cylinder is delivered to an injection line A when the actuator 4 slides in a direction of a solid line arrow. The right side part attains a suction state and a one-way valve 15b is opened, thereby the medicinal liquid, etc., is filled from the suction line B. The right side part of the piston 10 attains the injection state and the left side part attains the suction state when the actuator 4 slides in the opposite direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is directed to preoperative or postoperative treatment of severely ill patients, especially preoperative or postoperative treatment of children, etc., or to patients requiring precise infusion for a long time, continuously or intermittently. The present invention relates to an automatic infusion device for infusing medicines and medical fluids.

[0002]

2. Description of the Related Art An automatic infusion device is used as a device for continuously or intermittently infusing blood or a medicinal solution into a patient during treatment, not by spontaneous drop such as drip.
In a conventional automatic infusion device of this type, an automatic infusion device (not shown) of a type in which an injection tube is squeezed by a roller pump or a finger pump to perform automatic injection is used.

[0003]

In the conventional automatic infusion device as described above, the injection tube whose inner diameter is determined is squeezed by a roller pump or finger pump to perform automatic injection. There is a limit and high flow rate injection is not possible. Further, there is a problem that the injection amount cannot be finely adjusted due to its structure, and further it is difficult to perform an injection of a very small amount per unit time due to its structure.

The present invention has been made to solve the above problems, and can easily perform both high flow rate injection and low flow rate injection continuously or intermittently, and also at low flow rate injection during high flow rate injection. It is an object of the present invention to provide an automatic infusion device capable of finely adjusting the flow rate at any time.

[0005]

SUMMARY OF THE INVENTION An automatic infusion device according to the present invention is a bidirectional cylinder pump having a cylinder having tip openings on both sides of a sliding piston, and tip openings of the bidirectional cylinder pump. A first one valve that is “open” in the injecting state, a second one valve that is “open” in the inhaling state, and one end portion thereof, which are respectively provided through branch connectors Is connected to the injection line and the other one of the two ends is connected to the first one-valve, respectively, and the other one of the two ends is connected to the suction line. And a second branch tube connected to the second one-way valve, respectively, and the drive mechanism causes the piston to reciprocally slide in the bidirectional cylinder pump. Let the other side of the piston inject on the other side while inhaling on the other side, and on the other hand, on the other hand, let the other side of the piston inhale and inject on the other side. , Characterized by performing continuous or intermittent infusion by performing this operation continuously or intermittently

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a broken plan view showing an embodiment of the present invention.
In the figure, 1 is a bidirectional cylinder pump, 2 is a cylinder pump drive mechanism, 3 is a cylinder pump fixing mechanism,
4 is an actuator, 10 is a piston, 11 is a clean area, 12a is a tip opening provided at the left end of the cylinder in the drawing, 12b is a tip opening provided at the right end of the cylinder, and 13a is provided at the tip opening 12a. Branch connector, 13b is a branch connector provided at the tip opening 12b, 14a and 14b are first one valves which are "open" in the injecting state, and 15a and 15b are first valves which are "open" in the inhaling state. One of the two valves 16 has a first end connected to the injection line and the other two ends connected to the first one valves 14a and 14b, respectively.
2 is a second branch tube whose one end is connected to the suction line and the other two ends are connected to the second one-way valves 15a and 15b, respectively.

As shown in FIG. 1, the bidirectional cylinder pump 1 has a shaft through which a piston 10 is fixed in the longitudinal direction, and a piston rod is provided at one end of the shaft. The piston rod drives the cylinder pump. It is held by an actuator 3 protruding from the mechanism 2, and the actuator 3 reciprocally slides in the directions of the solid and dotted arrows in the drawing, so that the piston 10 can be moved in the cylinder sandwiched by the clean areas 11 on both sides. Slides back and forth in the direction of the arrow (shown by the solid and dotted lines) in the drawing. The reason why the clean areas 11 are provided on both sides of the cylinder is that the shafts entering and exiting the cylinder prevent foreign bacteria and dirt from entering the cylinder. The cylinder is provided with openings 12a and 12b at both end portions thereof. Therefore, when the piston 10 slides in the right direction in the drawing even though it is one cylinder, the right side portion of the piston 10 Becomes the injection state, the left side of the piston 10 becomes the suction state,
When the piston 10 slides to the left, the left side portion of the piston 10 is in the injecting state and the right side portion of the piston 10 is in the inhaling state, that is, two cylinders that operate independently by the movement of one piston. It is configured to have the same function as.

Next, the operation will be described. When the operation of the actuator 4 slides in the direction indicated by the solid arrow in FIG. 1 (corresponding to the outward path of the reciprocating motion), the left side portion of the piston 10 is in the injection state, while the valve 14a is "open". The drug solution or blood in the cylinder is delivered to the infusion line. On the other hand, the right side portion of the piston 10 is in an inhaled state, and the one-way valve 15b is "opened" so that the liquid medicine or blood is filled into the right side portion from the suction line. Then, when the piston 10 reaches the left end of the cylinder and the injection of the blood or the drug solution on the left side is completed, the actuator 4 slides in the opposite direction (return path indicated by the dotted arrow), and the piston 10
The right side of the piston 10 is in the injecting state while the valve 14b is "open" to start injecting the drug solution or blood filled up until now, and the left side of the piston 10 is in the inhaling state while the valve 15a is "open" and the drug solution is Or start inhaling blood. Since the above operation is repeated, continuous injection without interruption is possible. In addition, intermittent reciprocating motion of the actuator enables intermittent injection. Furthermore, since injection is performed using a cylinder, it is possible to perform high flow rate injection that does not depend on the inner diameter of the tube, and it is possible to perform precise flow rate adjustment during both high flow rate injection and low flow rate injection.

In the above embodiment, the device is integrated with the cylinder pump drive mechanism and the actuator. However, by changing the shape of the cylinder pump fixing mechanism, a conventional high pressure automatic injection using a general cylinder is used. It goes without saying that the cylinder pump drive mechanism and the actuator can be used as they are.

[0010]

As described above, the automatic infusion device of the present invention can easily perform continuous or intermittent high-flow injection and low-flow injection, and can also perform low-flow injection during high-flow injection. Even at this time, there is an effect that the flow rate can be finely adjusted.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1 Bidirectional Cylinder Pump 10 Piston 11 Clean Area 12a, 12b Tip Opening 13a, 13b Branch Connector 14a, 14b First One Valve 15a, 15b Second One Valve 16 First Branch Tube 17 Second Branch Tube

Claims (2)

[Claims] 1. An automatic infusion device for continuous or intermittent infusion, wherein a bidirectional cylinder pump has a cylinder having a tip opening on each side of a sliding piston, and each tip opening of the bidirectional cylinder pump. A first one valve, which is “open” in the injecting state and a second one valve, which is “open” in the inhaling state, which are respectively provided one by one via branch connectors, respectively, have one end portion thereof. A first branch tube connected to the injection line and the other one of the two ends being connected to the first one valve, respectively, and one of the other ends being connected to the suction line and the other one of the two ends. Includes a second branch tube connected to each of the second one-way valves, and a drive mechanism causes the piston to reciprocally slide in the bidirectional cylinder pump. Have one side of the stone (tentatively referred to as the first side) inhale and inject the other side of the piston (tentatively referred to as the second side) to inject. In the return path, on the contrary, inhalation is performed on the second side and injection is performed on the first side, and this operation is performed continuously or intermittently to perform continuous or intermittent infusion. Automatic infusion device. 2. A chamber that is isolated from the outside air is provided on each side of the bidirectional cylinder, and a driving body (shaft) that drives the piston penetrates the two chambers with the cylinder interposed therebetween. The automatic infusion device according to claim 1, characterized in that the inside of the cylinder is not contaminated by outside air even when the driving body (shaft) goes in and out of the cylinder.