CN204133950U - Anti-blood-returning transfusion system - Google Patents

Abstract

An anti-reflux infusion set, including an infusion hose, a flow rate regulator, and a Murphy dropper, one end of the infusion hose is connected to a cork puncturer, the other end is used to connect with an infusion needle, and the infusion hose is used to connect the infusion needle One end of the inner wall is provided with a one-way flow part, which includes two inflatable film pockets. The two film pockets are symmetrical along the axis of the infusion hose. The opposite sides of the pockets are respectively fixed on the inner wall of the infusion hose, and the opposite side of the two film pockets is a convex arc surface, and the arc length of the arc surface is longer than 1/2 of the inner diameter of the infusion hose. , the arc-shaped surfaces fit together to form a one-way interception, and the infusion hose is connected to the infusion needle through the joint. By setting one-way flow parts, it will not hinder the infusion, but also avoid blood backflow during the infusion process, reducing the harm to patients and the disputes between doctors and patients.

Description

Anti-reflux infusion set

technical field

The utility model relates to a medical transfusion device, in particular to an anti-reflux transfusion device.

Background technique

At present, the infusion set used in the hospital for intravenous infusion is usually a disposable infusion set, which is a disposable medical consumable that has undergone aseptic treatment and establishes a channel between the vein and the liquid medicine. Existing infusion sets usually consist of needles (such as disposable intravenous infusion needles, intravenous indwelling needles, etc.), protective caps, infusion hoses, liquid medicine filters, flow rate regulators, Murphy's dropper, bottle stopper puncturer , Air intake pipe air filter connection, which is mainly used for clinical gravity infusion.

In clinical work, medical personnel insert the bottle stopper piercer of the infusion set into the infusion bottle, hang the infusion bottle on the infusion rod, exhaust the air and fill the entire infusion hose with liquid medicine, and then close the flow rate regulator to perform venipuncture. After the needle puncture is fixed, the flow rate regulator can be opened and the drip rate can be adjusted for infusion. During the infusion process, under the action of atmospheric pressure, the liquid in the infusion bottle flows into the Murphy dropper along the infusion hose. The tube goes into a vein. However, when the liquid medicine is infused or a small amount of liquid medicine remains in the infusion tube, since the water column pressure is lower than the venous pressure at this time, if the flow rate regulator is not closed in time or the needle is pulled out, the patient's venous blood will flow back into the infusion solution. In the hose, this will frighten the patient at least, causing the patient to worry and uneasiness, and at the worst, it will cause unnecessary medical accidents, and then cause doctor-patient disputes.

Therefore, how to avoid the phenomenon of venous blood flowing back into the infusion set during the infusion process is a problem to be solved by those skilled in the art.

Contents of the invention

The purpose of this utility model is to provide an anti-reflux infusion device for the deficiencies of the prior art. By setting a one-way flow part in the infusion hose, it will not affect the infusion, and can avoid the venous blood flow during the infusion process. The occurrence of the phenomenon of backflow into the infusion set reduces harm to patients and disputes between doctors and patients.

The purpose of this utility model is achieved like this: a kind of anti-reflux transfusion device, comprises infusion hose, is connected with flow rate regulator, Murphy's dropper on the infusion hose, and one end of infusion hose is connected with cork puncturer, The other end is used to connect with the infusion needle, and the inner wall of the one end of the infusion hose used to connect the infusion needle is provided with a one-way flow part to prevent blood backflow. The one-way flow part includes two inflatable film pockets, two Two film pockets are arranged symmetrically along the axis of the infusion hose, and the openings of each film pocket are all facing one end of the infusion hose for connecting the infusion needle. The opposite sides of the two film pockets are respectively fixed on the inner wall of the infusion hose. The opposite side of the film pockets is a convex arc surface, and the arc length of the arc surface of each film pocket is greater than 1/2 of the inner diameter of the infusion hose, and the returned blood enters each film pocket to make each film pocket full After expansion, the curved surfaces of the film pockets fit together to form one-way interception. The outer wall of one end of the infusion hose used to connect to the infusion needle is fixedly connected with a joint, and the infusion hose is connected to the infusion needle through the joint.

The arc-shaped surface of each film bag is located at one end of the bag mouth and protrudes out of the infusion hose and is located in the joint.

The film pocket is a polyethylene film pocket.

The arc length of the arc surface of each film pocket is 2/3 of the inner diameter of the infusion hose.

Adopt the above-mentioned technical solution: because the inner wall of one end of the infusion hose of the utility model used to connect the infusion needle is provided with a one-way flow part to prevent blood backflow, the one-way flow part includes two inflatable film pockets, two The film pockets are arranged symmetrically along the axis of the infusion hose, and the openings of each film pocket are facing one end of the infusion hose for connecting the infusion needle. The opposite sides of the two film pockets are respectively fixed on the inner wall of the infusion hose. The opposite side of the film pockets is a convex arc surface, and the arc length of each film pocket’s arc surface is greater than 1/2 of the inner diameter of the infusion hose, and the returned blood enters each film pocket, making each film pocket full and inflated Finally, the arc-shaped surfaces of the film pockets are attached to each other to form a one-way interception, and the outer wall of one end of the infusion hose used to connect the infusion needle is fixedly connected with a joint, and the infusion hose is connected to the infusion needle through the joint, so that During normal infusion, the two film pockets are in a dry state, that is, the one-way flow part is in a fully open state, and the liquid medicine can only flow from the end of the infusion hose connected to the cork puncturer to the end of the infusion hose connected to the infusion needle, ensuring The liquid medicine is circulated without affecting the normal infusion; when the liquid medicine is infused or there is a small amount of liquid medicine left in the infusion hose, the venous blood will return to the infusion hose through the infusion needle and connector in sequence because the water column pressure is lower than the venous pressure , when the blood flows back to the openings of the two film pockets, the returning blood will flow into each film pocket, making each film pocket full and inflated. Direct cut-off, that is, the one-way flow parts are in a completely closed state, so that the backflow of blood is cut off, so as to avoid the occurrence of further backflow of blood into the infusion set, and reduce the harm to patients and disputes between doctors and patients.

Because the arc-shaped surface of each film pocket is positioned at one end of the pocket and stretches out of the infusion hose, it is located in the joint, and the arc length of the arc-shaped surface of each film pocket is 2/3 of the inner diameter of the infusion hose, so only a few A small amount of backflow blood can make each film pocket full, greatly shortening the time required for filling, so that the one-way flow part can quickly play the role of cut-off.

The anti-reflux transfusion device of the utility model has a simple structure and is convenient for processing and manufacturing. By arranging a one-way flow part in the transfusion hose, it will not affect the transfusion, and can avoid the occurrence of venous blood backflow into the transfusion device during the transfusion process. , Reduce harm to patients and doctor-patient disputes.

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the use state schematic diagram of the utility model;

Fig. 3 is an enlarged view of part P of Fig. 2;

Fig. 4 is a schematic diagram along the line A-A of Fig. 2 .

In the accompanying drawings, 1 is an infusion hose, 2 is a flow rate regulator, 3 is a Murphy's dropper, 4 is a cork puncturer, 5 is an infusion needle, 6 is a film pocket, 61 is an arc surface, and 7 is a connector .

Detailed ways

Referring to Fig. 1 to Fig. 4, an embodiment of the anti-reflux infusion set, the infusion set includes an infusion hose 1, a flow rate regulator 2, a Murphy's dropper 3 are connected to the infusion hose 1, and the infusion hose 1 One end is connected with a cork piercer 4 for connecting an infusion bottle, and the other end of the infusion hose 1 is used for connecting with an infusion needle 5 . The inner wall of one end of the infusion hose 1 used to connect the infusion needle 5 is provided with a one-way flow part to prevent blood backflow. The axis of flexible pipe 1 is arranged symmetrically, and the bag mouth of each film pocket 6 all faces one end of infusion hose 1 for connecting infusion needle 5, and the opposite sides of two film pockets 6 are respectively fixed on the inner wall of infusion hose 1, The facing sides of the two film pockets 6 are convex arc-shaped surfaces 61, and the arc length of the arc-shaped surfaces 61 of each film pocket is greater than 1/2 of the inner diameter of the infusion hose 1, and the blood that passes through the backflow enters each film pocket 6 After the film pockets 6 are filled and inflated, the curved surfaces 61 of the film pockets fit each other to form a one-way interception, which is used to stop the backflow of blood, avoiding the occurrence of further blood backflow into the infusion set, and reducing the harm to the patient and Doctor-patient disputes. The outer wall of one end of the infusion hose 1 used to connect the infusion needle 5 is fixedly connected with a joint 7, and the infusion hose 1 is connected to the infusion needle 5 through the joint 7, which is convenient for connecting with the infusion needle 5 and will not damage the film pocket. 6 Influence and interference. In the present embodiment, the arc-shaped surface of each film pocket 6 is positioned at one end of the bag opening and stretches out of the infusion hose 1, and is positioned in the joint 7, and the arc length of the arc-shaped surface 61 of each film pocket is 1/2 of the inner diameter of the infusion hose 1. 2/3, so that each film pocket 6 can be filled with only a small amount of reflux blood, which greatly shortens the time required for filling, and enables the one-way flow part to quickly play the role of cut-off. The film pocket 6 is a polyethylene film pocket, and the film pocket 6 of the present embodiment is a low-density polyethylene film pocket, which not only has the advantages of translucence, luster, and soft texture, but also has excellent chemical stability, thermal Sealability, water resistance, moisture resistance and freezing resistance, so that it can ensure that there will be no leakage during use, and ensure the normal use of the film bag 6.

The utility model is used like this:

During normal infusion, the liquid medicine flows along the end of the infusion hose connected to the cork piercer to the end of the infusion hose connected to the infusion needle. The flow pressure of the liquid medicine is high, and at the same time, because the two film pockets are in a dry state, that is, the one-way flow part is in a fully open state, so under the pressure of the liquid medicine, the arc-shaped surface of the two film pockets is attached to the other side Together, ensure the circulation of the liquid medicine without affecting the infusion; when the liquid medicine is infused or a small amount of liquid medicine remains in the infusion hose, the venous blood passes through the infusion needle and the joint in sequence because the pressure of the water column is lower than the venous pressure Backflow into the infusion hose, when the blood flows back to the mouth of the two film pockets, the return blood will flow into each film pocket, making each film pocket full and inflated, after each film pocket is filled and inflated, the curved surface of each film pocket will They fit together to form a one-way interception, that is, the one-way flow parts are in a completely closed state, so that the backflow of blood is stopped, so as to avoid the occurrence of further blood backflow into the infusion set, and reduce the harm to patients and disputes between doctors and patients.

The above embodiments only describe the preferred implementation of the utility model, and do not limit the scope of the utility model. The various modifications and improvements all fall within the scope of protection determined by the claims of the present utility model.

Claims (4)

1. an anti-blood-returning transfusion system, comprise infusion tube (1), infusion tube (1) is connected with flow regulator (2), Murphy's dropper (3), one end of infusion tube (1) is connected with bottle plug puncture unit (4), the other end is used for being connected with infusion needle (5), it is characterized in that: described infusion tube (1) is provided with the one-way flow parts preventing blood backflow for one end inwall connecting infusion needle (5), these one-way flow parts comprise the film pocket (6) that two can fill expansion, two film pocket (6) are arranged along the axisymmetrical of infusion tube (1), the bag mouth of each film pocket (6) all towards infusion tube (1) for connecting one end of infusion needle (5), the one side that two film pocket (6) are opposing is separately fixed on the inwall of infusion tube (1), two film pocket (6) one side is in opposite directions the arcwall face (61) of evagination, the arc length of the arcwall face (61) of each film pocket is greater than 1/2 of the internal diameter of infusion tube (1), enter in each film pocket (6) by the blood of backflow, after making the full expansion of each film pocket (6), the arcwall face (61) of each film pocket is bonded to each other, form unidirectional damming, described infusion tube (1) is fixedly connected with joint (7) on one end outer wall connecting infusion needle (5), described infusion tube (1) is connected with infusion needle (5) by joint (7).

2. anti-blood-returning transfusion system according to claim 1, is characterized in that: infusion tube (1) is stretched out outward in one end that the arcwall face of each film pocket (6) is positioned at bag mouth, is arranged in joint (7).

3. anti-blood-returning transfusion system according to claim 1 and 2, is characterized in that: described film pocket (6) is polyethylene film pocket.

4. anti-blood-returning transfusion system according to claim 1, is characterized in that: the arc length of the arcwall face (61) of each film pocket is 2/3 of the internal diameter of infusion tube (1).