CN210542682U - Anti-backflow infusion device - Google Patents

Abstract

The utility model belongs to the technical field of medical equipment, a backflow-resistant infusion device is related to, the major structure includes syringe needle, thin hose, connector, first transfer line, backflow-resistant valve, hold the chamber, the dropping liquid seam, the roof, the liquid storage pipe, the second transfer line, the bottle plug pjncture needle, air cleaner, regulator, one end and the thin hose connection of the syringe needle of metal material, fixed set up on the connector inner chamber roof prevents backflow-resistant valve, prevent that backflow-resistant valve is the ladder-shaped structure valve that has the chamber of holding of medical soft plastics material, the dropping liquid seam has been seted up to the bottom of backflow-resistant valve, prevent that the top opening of backflow-resistant valve covers the entry that first transfer line and connector roof linked together the position, prevent that backflow-resistant valve's upper portion opening edge and roof are sealed fixed, hold the chamber and be linked together with first transfer; the device has the advantages of reasonable, ingenious and simple overall structure design, scientific principle, convenient operation, safety, reliability, good universality, convenient popularization and environment-friendly application.

Description

Anti-backflow infusion device

The technical field is as follows:

the utility model belongs to the technical field of medical instrument, a anti transfusion device that flows back is related to, especially a prevent transfusion process blood reflux's infusion set for among the venous transfusion.

Background art:

the infusion device is a disposable medical consumable material mainly used for intravenous infusion, and generally comprises an intravenous needle, an infusion hose, a flow rate regulator, a drip cup, a bottle stopper puncture outfit and an air inlet pipe air filter which are connected. In the process of venous transfusion, when a patient changes positions, lifts arms, walks, contracts muscle of the patient and drips off liquid medicine in a liquid medicine bottle, venous blood flows back to a transfusion tube through a needle head, so that psychological fear is caused to the patient, and pain is brought; blood flowing back into the infusion apparatus coagulates into a clot, and if the clot enters the human body again, a situation that the blood vessel is blocked by thrombus may occur, and even serious medical accidents such as iatrogenic infection and septicemia occur, so that the health of a patient is damaged.

The chinese utility model patent with application number CN201120346897.5 discloses an infusion apparatus for internal medicine, a valve tube is arranged between a needle head and an infusion tube, a partition plate is arranged at the lower part in the valve tube, more than 1 liquid through hole is arranged on the partition plate, a valve ball structure is arranged on the partition plate in the valve tube, a check valve is formed by the valve tube and the valve ball, only liquid can be fed, the valve ball is closed when the infusion is finished, and the purpose of preventing the backflow of blood is achieved; but this technical structure is more complicated, it is with high costs to be applied to disposable transfusion system, cause the wasting of resources, therefore, seek to design an anti transfusion device that flows back, the valve that flows back is prevented to the soft plastics material that has the dropping liquid seam in the tubule end setting of transfer line, during the infusion, liquid flows into in the valve that flows back is prevented to the transfer line, pass the dropping liquid seam and get into the tubule under the action of gravity, from syringe needle input patient internal, when taking place the blood refluence, blood refluence gets into the tubule and is full of the tubule, under no external force, the dropping liquid seam of the valve that prevents flowing back of soft plastics material can't open, thereby reach the purpose that.

The invention content is as follows:

an object of the utility model is to overcome the shortcoming that prior art exists, propose and design an anti transfusion device that backflows to solve the problem of blood large tracts of land refluence in the infusion, reduce patient's psychology panic, overcome prior art structure complicacy, with high costs, the defect of wasting of resources.

In order to achieve the above object, the main structure of the device of the present invention comprises: the device comprises a needle head, a thin hose, a connector, a first infusion tube, a backflow prevention valve, a containing cavity, a dropping slit, a top wall, a liquid storage tube, a second infusion tube, a bottle stopper puncture needle, an air filter and a regulator; one end of a needle head made of metal is connected with a thin hose, the diameter of the thin hose is 1-2 mm, the other end of the thin hose is communicated with a first infusion tube with the diameter of 2-4 mm through a connector, and the first infusion tube is made of a medical hose; the medical plastic connector is of a hollow cylindrical structure, the diameter of the medical plastic connector is 3-10 mm, and the height of the medical plastic connector is 4-10 mm; a backflow prevention valve is fixedly arranged on the top wall of the inner cavity of the connector, the backflow prevention valve is a trapezoid-structure valve which is made of medical soft plastic and provided with a containing cavity, a liquid dropping seam is formed in the bottom of the backflow prevention valve, an opening in the top end of the backflow prevention valve covers an inlet at the position where a first liquid conveying pipe is communicated with the top wall of the connector, the edge of an opening in the upper portion of the backflow prevention valve is fixed with the top wall in a sealing mode, and the containing cavity is communicated with the first liquid conveying pipe; when the first infusion tube is vertically placed, liquid in the containing cavity of the backflow prevention valve flows into the connector and the thin hose along the dropping seam under the action of gravity and the liquid pressure in the dropping bottle, and then is input into a patient; the other end of the first infusion tube is communicated with a second infusion tube through a liquid storage tube, the diameter and the material of the second infusion tube are the same as those of the first infusion tube, the other end of the second infusion tube is communicated with a bottle stopper puncture needle, and an air filter is fixedly arranged on the side surface of the bottom of the bottle stopper puncture needle; the liquid storage pipe made of the medical hose material is of a hollow columnar structure, the diameter of the liquid storage pipe is 8-20 mm, and the height of the liquid storage pipe is 15-25 mm.

When the utility model is used, the bottle stopper puncture needle is inserted into the dropping liquid bottle, the needle head is inserted into the vein of the patient, the regulator is adjusted to ensure that the liquid medicine enters the containing cavity of the backflow prevention valve from the second liquid conveying pipe, the liquid storage pipe and the first liquid conveying pipe, and the liquid medicine enters the connector and the thin hose along the dropping liquid seam under the action of gravity and then is input into the body of the patient; when venous blood reflows to the thin hose through the needle head due to the reasons of position change, arm lifting, ambulation and the like of a patient, liquid and blood in the thin hose are blocked in the thin hose by the backflow prevention valve and cannot flow back to the containing cavity, so that the aim of preventing the backflow of the blood is fulfilled; blood only flows back in the thin hose, the backflow distance is short, and the pollution probability of blood flow is reduced.

Compared with the prior art, the utility model has the advantages that the backflow prevention valve is arranged at the end of the thin hose, blood backflow is prevented in advance at the end of the thin hose, the blood pollution probability is reduced, the blood backflow is reduced, the psychological panic of a patient is relieved, the backflow prevention structure is simple, the cost is low, and the resource waste is reduced; the device has the advantages of reasonable, ingenious and simple overall structure design, scientific principle, convenient operation, safety, reliability, good universality, convenient popularization and environment-friendly application.

Description of the drawings:

fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a partially enlarged schematic view of the connector of the present invention.

The specific implementation mode is as follows:

the present invention will be further described with reference to the following specific embodiments and accompanying drawings.

Example 1:

the anti transfusion device that backflows that this embodiment relates to, its major structure includes: the device comprises a needle head 1, a thin hose 2, a connector 3, a first infusion tube 4, a backflow prevention valve 5, a containing cavity 6, a dropping slit 7, a top wall 8, a liquid storage tube 9, a second infusion tube 10, a bottle stopper puncture needle 11, an air filter 12 and a regulator 13; one end of a needle head 1 made of metal is connected with a thin hose 2, the diameter of the thin hose 2 is 1-2 mm, the other end of the thin hose 2 is communicated with a first infusion tube 4 with the diameter of 2-4 mm through a connector 3, and the first infusion tube 4 is made of a medical hose; the medical plastic connector 3 is of a hollow cylindrical structure, the diameter of the connector is 3-10 mm, and the height of the connector is 4-10 mm; a backflow prevention valve 5 is fixedly arranged on the top wall 8 of the inner cavity of the connector 3, the backflow prevention valve 5 is a trapezoidal structure valve which is made of medical soft plastic and provided with a containing cavity 6, a dropping seam 7 is formed in the bottom of the backflow prevention valve 5, an opening in the top end of the backflow prevention valve 5 covers an inlet at the position where the first infusion tube 4 is communicated with the top wall 8 of the connector 3, the edge of an opening in the upper portion of the backflow prevention valve 5 is fixed with the top wall 8 in a sealing mode, and the containing cavity 6 is communicated with the first infusion tube 4; when the first infusion tube 4 is vertically placed, liquid in the containing cavity 6 of the backflow prevention valve 5 flows into the connector 3 and the thin hose 2 along the dropping slit 7 under the action of gravity and the pressure of the liquid in the infusion bottle, and then is input into a patient; the other end of the first infusion tube 4 is communicated with a second infusion tube 10 through a liquid storage tube 9, the diameter and the material of the second infusion tube 10 are the same as those of the first infusion tube 4, the other end of the second infusion tube 10 is communicated with a bottle stopper puncture needle 11, and an air filter 12 is fixedly arranged on the side surface of the bottom of the bottle stopper puncture needle 11; the liquid storage tube 9 made of the medical hose material is of a hollow columnar structure, the diameter of the liquid storage tube is 8-20 mm, and the height of the liquid storage tube is 15-25 mm.

When the device is used, the bottle stopper puncture needle 11 is inserted into a dropping bottle, the needle head 1 is inserted into a vein of a patient, the regulator 13 is adjusted, so that liquid medicine enters the accommodating cavity 6 of the backflow prevention valve 5 from the second liquid conveying pipe 10, the liquid storage pipe 9 and the first liquid conveying pipe 4, and the liquid medicine enters the connector 3 and the thin hose 2 along the dropping seam 7 under the action of gravity and then is input into the patient; when venous blood reflows to the thin hose 2 through the needle head 1 due to the fact that a patient changes positions, lifts arms, walks and the like, liquid and blood in the thin hose 2 are blocked in the thin hose 2 by the backflow prevention valve 5 and cannot flow back to the accommodating cavity 6, and therefore the purpose of preventing the backflow of the blood is achieved; blood only flows back in the thin flexible pipe 2, and the backflow distance is short, so that the blood flow pollution probability is reduced.

Preferably, the backflow prevention valve 5 is a medical plastic film, is made of a soft material, and can swing along with liquid impact.

Claims (2)

1. An anti-reflux infusion device is characterized in that the main structure comprises a needle head, a thin hose, a connector, a first infusion tube, an anti-reflux valve, a containing cavity, a dropping slit, a top wall, a liquid storage tube, a second infusion tube, a bottle stopper puncture needle, an air filter and a regulator; one end of a needle head made of metal is connected with a thin hose, the diameter of the thin hose is 1-2 mm, the other end of the thin hose is communicated with a first infusion tube with the diameter of 2-4 mm through a connector, and the first infusion tube is made of a medical hose; the medical plastic connector is of a hollow cylindrical structure, the diameter of the medical plastic connector is 3-10 mm, and the height of the medical plastic connector is 4-10 mm; a backflow prevention valve is fixedly arranged on the top wall of the inner cavity of the connector, the backflow prevention valve is a trapezoid-structure valve which is made of medical soft plastic and provided with a containing cavity, a liquid dropping seam is formed in the bottom of the backflow prevention valve, an opening in the top end of the backflow prevention valve covers an inlet at the position where a first liquid conveying pipe is communicated with the top wall of the connector, the edge of an opening in the upper portion of the backflow prevention valve is fixed with the top wall in a sealing mode, and the containing cavity is communicated with the first liquid conveying pipe; when the first infusion tube is vertically placed, liquid in the containing cavity of the backflow prevention valve flows into the connector and the thin hose along the dropping seam under the action of gravity and the liquid pressure in the dropping bottle, and then is input into a patient; the other end of the first infusion tube is communicated with a second infusion tube through a liquid storage tube, the diameter and the material of the second infusion tube are the same as those of the first infusion tube, the other end of the second infusion tube is communicated with a bottle stopper puncture needle, and an air filter is fixedly arranged on the side surface of the bottom of the bottle stopper puncture needle; the liquid storage pipe made of the medical hose material is of a hollow columnar structure, the diameter of the liquid storage pipe is 8-20 mm, and the height of the liquid storage pipe is 15-25 mm.

2. The anti-reflux infusion device as claimed in claim 1, wherein the anti-reflux valve is a plastic medical film, is made of soft material, and can swing with the impact of liquid.

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