CN205549114U - A venous transfusion ware for preventing blood returns - Google Patents

Abstract

The utility model discloses an intravenous transfusion device for preventing blood return, which comprises an infusion hose body, one end of the infusion hose body is provided with an infusion bottle connection end, and the other end of the infusion hose body is provided with a vein needle connection end, Starting from the connection end of the infusion bottle, the body of the infusion hose is provided with a Murphy dropper, a flow rate regulator and a one-way flow part in sequence. There is a floating ball inside the Murphy dropper. An exhaust pipe is provided, and the diameter of the floating ball is larger than the inner diameter of the infusion hose body; the inner diameter of the exhaust pipe is not smaller than the diameter of the floating ball. The device can not only prevent air from entering due to over-infusion, but also has a good effect of preventing blood from flowing back into the infusion set.

Description

An intravenous infusion set for preventing blood return

technical field

The utility model belongs to the technical field of medical devices, in particular to a venous infusion set for preventing blood return.

Background technique

In clinical work, the medical staff insert the conical joint part of the infusion set into the infusion bottle, hang the infusion bottle on the infusion rod, exhaust the air and fill the entire infusion pipeline with medicinal liquid, close the regulator tightly, perform venipuncture again, fix the puncture needle and Adjust drip rate. Under the action of atmospheric pressure, the liquid in the bottle flows into the Murphy's dropper along the infusion tube. When the water column pressure in the Murphy's dropper is greater than the venous pressure, the liquid in the bottle flows into the vein along the infusion tube. However, when the liquid medicine is infused or a small amount of liquid medicine remains in the infusion tube, the pressure of the water column is lower than the venous pressure. If the flow rate regulator is not closed in time or the venous needle is pulled out, the patient's venous blood may flow back into the infusion tube. It will endanger the patient's life, but it will cause the patient's incomprehension, and may cause doctor-patient disputes.

Contents of the invention

The purpose of the utility model is to provide a venous infusion set for preventing blood return, which solves the problems in the prior art that air enters and blood returns due to over-infusion during infusion.

The technical solution adopted by the utility model is that an intravenous infusion set for preventing blood return includes an infusion hose body, one end of the infusion hose body is provided with an infusion bottle connection end, and the other end of the infusion hose body is provided with a vein The needle connection end, starting from the connection end of the infusion bottle, the body of the infusion hose is sequentially provided with a Murphy dropper, a flow rate regulator and a one-way flow component. An exhaust pipe is arranged near the connection end of the infusion bottle, and the diameter of the floating ball is larger than the inner diameter of the infusion hose body; the inner diameter of the exhaust pipe is not smaller than the diameter of the floating ball.

Further, the one-way flow component is a bag-shaped valve group, and the bag-shaped valve group includes a first bag-shaped valve and a second bag-shaped valve, and the first bag-shaped valve and the second bag-shaped valve are symmetrical about the axis of the infusion hose body It is set that the opening end of the first bag-shaped valve and the opening end of the second bag-shaped valve are both facing the connection end of the venous needle.

Further, the distance between the opening end of the bag-shaped valve group and the connecting end of the venous needle is less than or equal to the length of the infusion hose body. 1/20 .

Further, the material of the bag valve group is low-density polyethylene film.

Further, a cover is provided on the exhaust pipe.

The beneficial effects of the utility model are: the Murphy's dropper of the utility model is provided with a floating ball which enters from the exhaust pipe and has an appropriate weight. The connection port of the infusion hose body can seal the connection port after the liquid is reduced, and has a soft elastic plastic material sealing ball to prevent air from entering due to over-infusion and causing adverse consequences. In the utility model, a valve is arranged in the body. During normal infusion, the valve is attached to the inner surface of the infusion hose body. When the venous blood returns, the bag-shaped valve is filled and expanded, and the outer surfaces of the two valves are attached to form a closure, which does not affect the infusion. , and has better anti-blood backflow to the infusion set, reducing the harm to patients and doctor-patient disputes. The utility model provides people with a safe, easy, high-quality and low-cost new disposable safe and reliable infusion needle tube which is easy to manufacture, low in cost and good in sealing effect, and can provide people with medical infusion.

Description of drawings

picture 1 It is a structural schematic diagram of the venous infusion set for preventing blood return of the utility model;

picture 2 It is a structural schematic diagram of the one-way flow part of the utility model.

In the figure, 1. Infusion hose body, 2. Infusion bottle connection end, 3. IV needle connection end, 4. Murphy's dropper, 5. flow regulator, 6. one-way flow parts, 7. first pocket valve, 8. second pocket valve, 9. float, 10. exhaust pipe, 11. cover.

detailed description

The utility model will be described in detail below in conjunction with specific embodiments.

The utility model provides an intravenous infusion set for preventing blood return, as shown in the figure 1 shown, including infusion hose body 1 , infusion hose body 1 One end is provided with an infusion bottle connection end 2 , infusion hose body 1 The other end is provided with a venous needle connection end 3 , from the connection end of the infusion bottle 2 Start, infusion hose body 1 Murphy's dropper 4 , flow rate regulator 5 and one-way flow parts 6 , Murphy's dropper 4 Float inside 9 , Murphy's dropper 4 on and near the connection end of the infusion bottle 2 equipped with exhaust pipe 10 , float 9 The diameter is larger than the body of the infusion hose 1 inner diameter; exhaust pipe 10 The inner diameter of the float is not smaller than the 9 diameter of.

as shown in the picture 2 shown, one-way flow parts 6 is the bag valve group, the bag valve group includes the first bag valve 7 and second pocket valve 8 , first pocket valve 7 and second pocket valve 8 Infusion hose body 1 Axisymmetric arrangement of the axis, the first pocket valve 7 The opening end of the and the second pocket valve 8 The open ends of the needles are all facing the end of the IV needle connection 3 . The setting position of the opening end of the bag valve group and the connection end of the venous needle 3 The distance between is less than or equal to the body of the infusion hose 1 of length 1/20 . The material of the bag valve group is low-density polyethylene film. exhaust pipe 10 set with cover 11 .

When in use, when the liquid medicine goes along the body of the infusion hose 1 From the connection end of the infusion bottle 2 To the venous needle connection end 3 When the flow is in progress, when the liquid drops down to a certain amount, the floating ball 9 Float up to make the liquid continue to enter downwards and start normal infusion. When the liquid is no longer dripping, the floating ball 9 Will drop as liquid decreases, Murphy's dropper 4 with infusion hose body 1 The bottom outlet is formed at the intersection until the liquid drops to the bottom outlet and the bottom outlet is sealed, and the lower infusion hose body 1 The remaining liquid in the liquid will also stay still and no longer enter the blood vessels of the human body, and to terminate the infusion, only need to put the Murphy's dropper 4 Tilt to float the ball 9 Roll away Murphy's dropper 4 The bottom of the outlet, and the remaining liquid continues to enter the human body, and the output of the remaining liquid is completed; at the same time, due to the Murphy's dropper 4 The internal pressure of the middle water column is greater than the internal pressure of the venous blood, so the flow pressure of the medicinal liquid is high. Under the pressure of the medicinal liquid, the first bag-shaped valve 7 and second pocket valve 8 They are all attached to the inner surface of the body to ensure the circulation of the liquid medicine. When the blood flows back into the body of the infusion hose 1 When the blood passes through the first pocket valve 7 The opening end of the and the second pocket valve 8 The opening end of the inflow valve, the first pocket valve 7 and second pocket valve 8 Inflated, first pocket valve 7 and second pocket valve 8 The outer surface of the valve will fit together and act as a cut-off, blocking the returning blood from the first pocket valve 7 and second pocket valve 8 Set the position so that the blood will not continue to flow back towards the end of the infusion bottle.

Both the first bag valve and the second bag valve are polyethylene bag valves. Since polyethylene materials have good chemical stability, water resistance and heat sealing performance, the use of polyethylene bag valves can ensure Leakage will not occur during the process, ensuring the normal use of the bag valve group.

The above embodiments of the utility model have been described in detail in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments, and various changes can be made within the scope of knowledge of those skilled in the art.

Claims (5)

1. An intravenous infusion set for preventing blood return, characterized in that it includes an infusion hose body (1), one end of the infusion hose body (1) is provided with an infusion bottle connection end (2), and the infusion The other end of the hose body (1) is provided with an intravenous needle connection end (3), starting from the infusion bottle connection end (2), the infusion hose body (1) is sequentially provided with a Murphy's dropper (4), A flow rate regulator (5) and a one-way flow component (6), the Murphy's dropper (4) is provided with a float (9), and the Murphy's dropper (4) is connected to the infusion bottle The end (2) is provided with an exhaust pipe (10), the diameter of the floating ball (9) is larger than the inner diameter of the infusion hose body (1); the inner diameter of the exhaust pipe (10) is not smaller than the The diameter of the float (9). 2. The venous infusion set for preventing blood return according to claim 1, characterized in that, the one-way flow component (6) is a bag-shaped valve group, and the bag-shaped valve group includes a first bag-shaped valve ( 7) and the second bag-shaped valve (8), the first bag-shaped valve (7) and the second bag-shaped valve (8) are symmetrically arranged on the axis of the infusion hose body (1), and the first bag-shaped valve (7) ) and the opening end of the second bag valve (8) are both facing the venous needle connection end (3). 3. The venous infusion set for preventing blood return according to claim 2, characterized in that the distance between the opening end of the bag-shaped valve group and the connecting end (3) of the venous needle is less than or equal to 1/20 of the length of the infusion hose body (1). 4. The intravenous infusion set for preventing blood return according to claim 3, characterized in that, the material of the bag-shaped valve group is a low-density polyethylene film. 5. The intravenous infusion set for preventing blood return according to claim 1, characterized in that a cover (11) is provided on the exhaust pipe (10).