CN2391620Y

CN2391620Y - Infusion device with anti back-flow function

Info

Publication number: CN2391620Y
Application number: CN 99240213
Authority: CN
Inventors: 黄冰
Original assignee: First Hospital of Jiaxing
Current assignee: First Hospital of Jiaxing
Priority date: 1999-11-03
Filing date: 1999-11-03
Publication date: 2000-08-16
Anticipated expiration: 2009-11-03

Abstract

The utility model relates to an infusion device with an anti-back-flow function, which is a medical device and comprises a liquid inlet needle 1, a dropping pot 3, a regulator and a puncturing needle connector 7. The liquid inlet needle is connected with the dropping pot by a guiding pipe 2. The dropping pot and the puncturing needle connector are connected by a guiding pipe 4. The regulator 5 is sheathed on the outer part of the guiding pipe 4 and the puncturing needle connector is provided with a one-way valve 6. The one-way valve is opened when medicine liquid forward flows and the one-way valve is closed when the medicine liquid is reverse with pressure difference. Thus the medicine liquid can not backward flow in infusion and a blood returning phenomenon is prevented.

Description

The anti-reflux infusion set

This utility model relates to a kind of medical apparatus and instruments, a kind of transfusion, transfusion set that the anti-reflux ability is arranged.

Transfusion, blood transfusion are important means of clinical treatment.Used transfusion (blood) device can satisfy the requirement of transfusion generally at present, but the blood back phenomenon can occur in some cases.For example, carry out blood pressure measurement in transfusion simultaneously on the limbs, when the sphygomanometer cuff is tied up above transfusion vein, and for example transfusion person is when holding bottle and go to toilet.Blood back not only causes stress to the patient, and might form thrombosis, blocks infusion channel.If thrombosis comes off, enter blood circulation, also can the thromboembolism pulmonary artery, cause serious consequences such as pulmonary infarction.

The purpose of this utility model is to propose a kind of anti-reflux infusion set, and the medicinal liquid in the time of guaranteeing to infuse can only forward flow, can not backflow, thereby prevent the generation of ' blood back ' phenomenon.

This anti-reflux infusion set comprises the feed liquor pin, drips kettle, actuator, puncture needle union joint, and the feed liquor pin is linked to each other by a conduit with a kettle, drips a kettle and is also linked to each other by a conduit with the puncture needle union joint, and actuator is placed in outside the conduit, and a check valve is arranged on the puncture needle union joint.

Check valve on this anti-reflux infusion set is opened when medicinal liquid forward flows, and closes when pressure differential is arranged in that medicinal liquid is reverse.Thereby medicinal liquid can not backflow when guaranteeing transfusion, has prevented the generation of blood back phenomenon.

Accompanying drawing 1 is the structure chart of this anti-reflux infusion set;

Accompanying drawing 2 is a kind of structure chart of check valve;

Accompanying drawing 3 is the structure chart of valve gap;

Accompanying drawing 4 is that the A of Fig. 3 is to view;

Accompanying drawing 5 is the structure chart of valve body;

Accompanying drawing 6 is the vertical view of Fig. 5.

As shown in Figure 1, this anti-reflux infusion set comprises feed liquor pin 1, drips kettle 3, actuator 5, puncture needle union joint 7.The feed liquor pin is linked to each other by conduit 2 with a kettle, drips a kettle and is linked to each other by conduit 4 with the puncture needle union joint, and actuator is enclosed within outside the conduit 4.Check valve 6 is arranged on the puncture needle union joint.The feed liquor pin is used for inserting in the infusion bottle and imports medicinal liquid and use, and the puncture needle union joint is used for being connected with the soft needle or the trocar.

Check valve 6 in this anti-reflux infusion set can be selected different version for use, for example unidirectional flapper-type, spherical valve core formula, valve block formula etc.Figure 2 shows that valve block formula structure, comprise valve gap 8, valve body 10 and valve block 9.As shown in Figure 3, the tubulose that the top of valve gap is 12 one-tenth thinner, a flat cylindrical cavity 15 is arranged at the bottom.As shown in Figure 5, the bottom of valve body becomes tubulose 11, and a flat cylindrical cavity 20 is arranged at top, and there is a wedge shape projection 16 at its center.As shown in Figure 2, the bottom of valve gap and the top of valve body are interlocked together, and valve gap is interior, and valve body outside.Valve block 9 is in the top of the interior wedge shape projection 16 of cavity under the valve gap, and the upper end of valve gap is linked to each other with a kettle 3 by conduit 4, and the lower end of valve body is the puncture needle union joint.When medicinal liquid forward flowed, when promptly flowing from top to bottom among Fig. 2, valve block was withstood by the wedge shape projection, and medicinal liquid is walked around valve block and entered in the valve body lower portion 11, forms path.When pressure reduction is arranged, valve block will be pressed to the top by medicinal liquid, be close to mutually with the sealing surface 19 on the valve gap when reverse, and medicinal liquid just can't reflux, and reaches the purpose of anti-reflux.

As shown in Figure 3 and Figure 4, can also there be some half-terete protruding 14 on the sidewall of bonnet lower cavity 15, guaranteeing that smooth suitable medicine liquid channel is arranged between valve block and cavity sidewalls, and can guarantee excessive sidesway of valve block.13 for preventing the make progress block of excessive fovea superior of valve block among the figure.

As shown in Figure 5 and Figure 6, some projections 18 that can also distribute on the bottom surface of valve body upper cavity 20, so that smooth suitable path is arranged between the bottom surface 17 of valve block and cavity, and valve block can not held by bottom surface 17, less reverse pressure reduction can make valve block move up, and opens and closes flexibly.21 is the corrugated tubing that is connected usefulness with the trocar among the figure.

Claims

1, a kind of anti-reflux infusion set, comprise feed liquor pin (1), drip kettle (3), actuator (5), puncture needle union joint (7), the feed liquor pin is linked to each other by conduit (2) with a kettle, dripping kettle is linked to each other by conduit (4) with the puncture needle union joint, actuator (5) is placed in outside the conduit (4), and it is characterized in that has a check valve (6) on the described puncture needle union joint.

2, anti-reflux infusion set as claimed in claim 1, it is characterized in that described check valve (6) comprises valve gap (8), valve body (10) and valve block (9), the top of valve gap becomes thinner tubulose, one flat cylindrical cavity (15) is arranged at the bottom, the bottom of valve body becomes tubulose, one flat cylindrical cavity (20) is arranged at top, there is a wedge shape projection (16) at its center, the bottom of valve gap and the top of valve body are interlocked together, valve block is in the top of the interior wedge shape projection (16) of cavity of bonnet lower, the upper end of valve gap is linked to each other with a kettle (3) by conduit (4), and the lower end of valve body (11) are the puncture needle union joint.

3, anti-reflux infusion set as claimed in claim 2 is characterized in that on the sidewall of described bonnet lower cavity (15) some half-terete projectioies (14) being arranged, and some projections (18) are distributing on the bottom surface of described valve body upper cavity (20).