CN204219384U - Medical anti-cross-contamination drug feeding device - Google Patents

Abstract

The utility model discloses a medical anti-cross-contamination dosing device, which comprises a syringe, a needle and a needle seat. barrel, and the tail of the syringe is fixedly connected to the bottom of the outer barrel, an annular channel is formed between the inner wall of the outer barrel and the outer wall of the syringe, a retaining ring is provided at the mouth end of the outer barrel, and the side wall of the syringe is provided with a The channel is connected to the air hole, the annular channel is provided with an annular piston, the annular piston is connected with the push-pull ring sleeved on the syringe through the connecting rod, and the connecting rod is sleeved with a return spring, and the return spring is located at Between the annular piston and the stop ring, and can be compressed when the annular piston is pulled outward with the push-pull ring. The medical anti-cross-contamination dosing device provided by the utility model directly uses the movement of the push-pull ring to form a negative pressure suction of the medicine liquid, which can effectively prevent the cross-contamination of the medicine liquid during dispensing and dosing, and ensure the safety of medication.

Description

Medical anti-cross-contamination dosing device

technical field

The utility model relates to the technical field of medical devices, in particular to a medical anti-cross-contamination dosing device.

Background technique

At present, the commonly used dosing device in the hospital is an ordinary syringe, which is composed of a syringe, a piston and a push rod. During operation, the medical staff pushes and pulls the piston to move through the push rod to realize operations such as suctioning and mixing the liquid medicine. The process of dispensing medicine is: insert the syringe into the liquid medicine bottle to extract a small amount of medicine liquid; then pull out the syringe and insert it into the medicine powder bottle, inject the medicine liquid into the medicine powder bottle, and after the medicine powder and medicine liquid are completely dissolved, draw out the mixed solution and inject it into the medicine powder bottle. In the infusion bottle. However, in actual use, it has been found that when medical staff perform operations such as suctioning and mixing medicinal liquid, their fingers will touch the push rod, which may cause contamination of the medicinal liquid and easily cause cross-infection. And in the above-mentioned dispensing process, since the medicine bottle is a sealed structure, a certain negative pressure difference will be generated during operation, which makes the operation very laborious.

Utility model content

The purpose of this utility model is to solve the deficiencies of the above-mentioned technical problems and provide a medical dosing device for preventing cross-contamination. The cross-contamination of the liquid medicine ensures the safety of the medicine.

In order to solve the deficiencies of the above-mentioned technical problems, the utility model adopts the technical scheme as follows: a medical anti-cross-contamination dosing device, including a syringe, a needle and a needle seat, the needle is fixedly arranged on the needle seat, and the syringe passes through the head and the needle The seat is matched and connected, the outer casing of the syringe is provided with an outer barrel, and the tail of the syringe is fixedly connected to the bottom of the outer barrel, an annular passage is formed between the inner wall of the outer barrel and the outer wall of the syringe, and a stopper is provided at the mouth of the outer barrel. The side wall of the syringe is provided with a vent hole communicating with the annular passage, and an annular piston is arranged in the annular passage, and the annular piston is connected with the push-pull ring sleeved on the syringe through a connecting rod, and the connecting rod A return spring is sheathed, and the return spring is located between the annular piston and the retaining ring, and can be compressed when the annular piston is pulled outward with the push-pull ring.

The vent hole is arranged near the tail of the syringe.

An air-permeable and water-impermeable film is arranged at the air hole.

Beneficial effect

The anti-cross-contamination dosing device of the utility model has a simple structure, does not have the push rod in contact with the finger and the piston in contact with the liquid medicine in the traditional dosing syringe, and directly uses the push-pull ring to move to form a negative pressure to suck the liquid medicine, which can effectively Prevent cross-contamination of the drug solution when operating the dosing syringe, and ensure the safety of medication; and a return spring is provided to push the push-pull ring to draw medicine, so that the return spring is compressed, and the elasticity of the return spring can be used to automatically add medicine when starting to add medicine. Can improve the efficiency of dosing.

Description of drawings

Fig. 1 is the schematic structural view of the utility model dosing device when the medicinal liquid is not extracted;

Fig. 2 is a schematic structural view of the utility model dosing device when extracting medicinal liquid;

Marks in the figure: 1. Syringe, 2. Needle, 3. Needle holder, 4. Outer sleeve, 5. Stop ring, 6. Air vent, 7. Ring piston, 8. Push-pull ring, 9. Return spring.

Detailed ways

As shown in the figure: the medical anti-cross-contamination drug doser includes a syringe 1, a needle 2 and a needle seat 3, the needle 2 is fixed on the needle seat 3, and the syringe 1 is connected to the needle seat 3 through the head. The outer cover of the syringe 1 is provided with an outer barrel 4, and the tail of the syringe 1 is fixedly connected to the bottom of the outer barrel 4, an annular passage is formed between the inner wall of the outer barrel 4 and the outer wall of the syringe 1, and the mouth of the outer barrel 4 is provided with a The retaining ring 5, the side wall of the syringe 1 is provided with a vent hole 6 communicating with the annular passage, the annular passage is provided with an annular piston 7, and the annular piston 7 is connected to the push-pull valve sleeved on the syringe 1 through the connecting rod. The rings 8 are connected, and a return spring 9 is sheathed on the connecting rod. The return spring 9 is located between the annular piston 7 and the stop ring 5 and can be compressed when the annular piston 7 is pulled outward with the push-pull ring 8 . The vent hole 6 is arranged near the tail of the syringe 1, and the vent hole 6 is provided with an air-permeable and water-impermeable film. The anti-cross-contamination dosing device of the utility model has a simple structure, without the push rod in contact with the finger and the piston in contact with the liquid medicine in the traditional dosing device, and directly uses the push-pull ring to move to form a negative pressure to suck the liquid medicine, which can effectively prevent The cross-contamination of the medicinal liquid when operating the dosing device ensures the safety of medication; and a return spring 9 is provided to push the push-pull ring 8 to pump medicine, so that the return spring 9 is compressed, and the elasticity of the return spring 9 can be used to automatically add medicine when starting to add medicine. medicine, and can improve the efficiency of dosing.

Claims (3)

1. medical anti-cross-contamination drug feeding device, comprise syringe (1), syringe needle (2) and needle holder (3), syringe needle (2) is fixedly installed in needle holder (3), head and the needle holder (3) of syringe (1) are connected, it is characterized in that: outside described syringe (1), be arranged with overcoat bucket (4), and the afterbody of syringe (1) is fixedly connected on the bottom of overcoat bucket (4), circular passage is formed between the inwall of overcoat bucket (4) and the outer wall of syringe (1), overcoat bucket (4) bung end is provided with baffle ring (5), the sidewall of syringe (1) is provided with the passage (6) be connected with this circular passage, annular piston (7) is provided with in described circular passage, annular piston (7) is connected with the push-and-pull ring (8) be set on syringe (1) by connecting rod, and connecting rod is arranged with back-moving spring (9), described back-moving spring (9) is positioned between annular piston (7) and baffle ring (5), and can be compressed when annular piston (7) is pulled outwardly with push-and-pull ring (8).

2. medical anti-cross-contamination drug feeding device as claimed in claim 1, is characterized in that: described passage (6) is arranged on the position near syringe (1) afterbody.

3. medical anti-cross-contamination drug feeding device as claimed in claim 1, is characterized in that: described passage (6) place is provided with the thin film of permeable watertight.