CN213822944U

CN213822944U - Micro-filtration membrane remaining needle capable of preventing excessive blood backflow and filtering impurities

Info

Publication number: CN213822944U
Application number: CN202022104741.8U
Authority: CN
Inventors: 伍家海
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-07-30
Anticipated expiration: 2030-09-23

Abstract

The utility model provides a needle is kept somewhere to microfiltration membrane of excessive backward flow of blood filtration impurity simultaneously, its structure is kept somewhere needle, microfiltration membrane protective housing, microfiltration membrane by the vein and constitutes, and the vein is kept somewhere the double-deck oval microfiltration membrane protective housing that the needle bifurcation inside has the slope to design, has one deck microfiltration membrane in the double-deck microfiltration membrane protective housing intermediate layer, and the microfiltration membrane is oval, and size, shape, direction all are the same and in close contact with the microfiltration membrane protective housing. Blood return chamber and liquid medicine chamber are respectively to double-deck microfiltration membrane protective housing both sides, can make things convenient for medical personnel in time to observe the vein blood return condition through the blood return chamber, help improving the puncture success rate, blood can't prevent the excessive backward flow of blood through microfiltration membrane, reduce blood coagulation risk, microfiltration membrane holds back tiny impurity such as rubber granule, plastic granules, glass fiber, insoluble liquid medicine granule in bacterium and medical equipment in vitro simultaneously, the injury to the patient of reduction that can furthest.

Description

Micro-filtration membrane remaining needle capable of preventing excessive blood backflow and filtering impurities

Technical Field

The utility model relates to a medical equipment, specific prevent that excessive backward flow of blood filters micro-filtration membrane of impurity simultaneously and keep somewhere needle that says so.

Background

The indwelling needle is one of the most common medical instruments in clinic, has obvious advantages and disadvantages, brings convenience to clinical treatment and has potential safety hazards, most indwelling needles do not have the functions of preventing excessive blood backflow and filtering, and blood is often caused to be coagulated and form thrombus. In addition, the infusion apparatus contains an incredible amount of plastic particles and rubber particles, glass fibers are generated when the ampoule is opened, some medicine bottles still contain insoluble medicine particles after being dispensed, medicines which are prepared under the condition that medical staff do not pay attention to the medicine bottles are polluted during and after dispensing, and if the indwelling needle does not filter, the plastic particles, the rubber particles, the glass fibers, bacteria and the insoluble medicine particles can bring diseases such as pulmonary vein embolism, pulmonary vessel granuloma, pulmonary artery injury, phlebitis and the like to patients.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a prevent excessive backward flow of blood and filter simultaneously microfiltration membrane of impurity and keep somewhere needle, the injury that causes the patient in furthest's reduction medical procedure.

In order to achieve the purpose, the utility model adopts the scheme that a bifurcated pipe is designed between a catheter seat and an extension pipe, a microfiltration membrane protective shell is arranged in the bifurcated pipe to divide the bifurcated pipe into a liquid medicine cavity and a blood return cavity, the blood return cavity is convenient for observing the blood return condition during puncture, and the liquid medicine cavity is convenient for filtering the microfiltration membrane more quickly.

Furthermore, the microfiltration membrane protective housing is a hard double-layer oval structure, the middle of the microfiltration membrane protective housing is provided with a layer of microfiltration membrane, and the microfiltration membrane protective housing plays a role in supporting and protecting the microfiltration membrane.

Furthermore, the microfiltration membrane can be made of nylon membrane, modified polyvinylidene fluoride membrane (modified hydrophilicity), polytetrafluoroethylene membrane (modified hydrophilicity) and polyvinylidene fluoride membrane (modified hydrophilicity), and the four microfiltration membrane materials are uniform in pore diameter, high in precision and reliability, 70% in surface pore size, free of medium falling off during filtration and free of secondary pollution.

Further, the short side radius of the oval micro-filtration membrane (9) is 2500 micrometers (mum), the long side radius is 5590 micrometers (mum), and the area is 43905092 mum²The area availability of the micro-filtration membrane (9) is designed to be 70 percent, the diameter of the aperture of the micro-filtration membrane (9) is 0.1 to 1 mu m, and the number of the apertures is 4 to 40 million.

The utility model has the advantages of can make things convenient for medical personnel in time to observe the vein condition of returning blood through the blood return chamber, blood can't prevent that excessive backward flow of blood from causing the blood coagulation through microfiltration membrane. Micro impurities such as plastic particles, rubber particles, glass fibers, bacteria, insoluble drug particles and the like can be filtered in vitro by the microfiltration membrane, so that the safety of a patient in the infusion process can be greatly improved, and the risk of the patient suffering from diseases such as pulmonary venous embolism, pulmonary vascular granuloma, pulmonary artery injury, phlebitis and the like due to infusion is reduced. Therefore, the utility model can bring great benefits for patients and medical circles, and has high popularization and use values.

Drawings

In order to more clearly illustrate the technical solution and the embodiments of the present invention, the drawings used in the embodiments will be briefly described below.

Fig. 1 is a front view of a schematic structural view of a microfiltration membrane indwelling needle for preventing excessive blood backflow and filtering impurities according to the present invention.

FIG. 2 is an enlarged schematic view of the front structure of the bifurcated tube, the microfiltration membrane protective housing and the microfiltration membrane of the microfiltration membrane indwelling needle for preventing excessive blood backflow and filtering impurities of the utility model.

FIG. 3 is a schematic view showing the micro-filtration membrane protective housing of the micro-filtration membrane indwelling needle and the side structure of the micro-filtration membrane for preventing excessive blood reflux and simultaneously filtering impurities according to the present invention.

In the drawings: 1. a plastic sleeve; 2. a catheter hub; 3. a needle guard sleeve; 4. a steel needle tube; 5. a sealing plug; 6. a needle wing; 7. a bifurcated tube; 8. a microfiltration membrane protective housing; 9. a microfiltration membrane; 10. a blood return cavity; 11. a liquid medicine cavity; 12. extending the hose; 13. a strip clamp; 14. a strip-shaped clamp hole; 15. an end cap; 16. a screw interface; 17. a heparin cap.

Detailed Description

The present invention will be further described with reference to the drawings and the detailed description.

As shown in figures 1-3, the utility model discloses a needle is kept somewhere to microfiltration membrane of excessive backward flow of prevention blood filtration impurity simultaneously, its structure is kept somewhere the needle by the vein, bifurcated pipe (7), microfiltration membrane protective housing (8), microfiltration membrane (9) constitute, bifurcated pipe (7) have been designed between catheter seat (2) extension hose (12) of needle is kept somewhere to the vein, there is microfiltration membrane protective housing (8) of slope design bifurcated pipe (7) inside, the inner wall of microfiltration membrane protective housing (8) zonulae occludens (7) and cut apart into blood return chamber (10) and liquid medicine chamber (11) two parts with bifurcated pipe (7), the blood return condition when blood return chamber (10) are convenient for the better observation puncture of medical personnel, liquid medicine chamber (11) are convenient for the faster filtration microfiltration membrane (9) of liquid medicine.

The utility model discloses as shown in fig. 2, 3, oval microfiltration membrane (9) are located the double-deck oval-shaped microfiltration membrane protective housing (8) intermediate layer of stereoplasm, and the size, shape, the direction homogeneous phase of microfiltration membrane protective housing (8) and microfiltration membrane (9).

In a specific embodiment of the present invention, the material of the elliptical microfiltration membrane (9) can be nylon membrane, modified polyvinylidene fluoride (modified hydrophilicity), polytetrafluoroethylene membrane (modified hydrophilicity), or polyvinylidene fluoride (modified hydrophilicity), and the four types of microfiltration membrane material have uniform pore diameter, high precision and reliability, 70% surface porosity, no media drop during filtration, and no secondary pollution.

In one embodiment of the present invention, the diameter of the aperture of the oval microfiltration membrane (9) is 0.1 μm to 1 μm, and the number of the apertures is 4 million to 40 hundred million. When the aperture of the micro-filtration membrane (9) is directly 1 μm, the number of the apertures of the micro-filtration membrane (9) is 4 million. When the pore diameter of the micro-filtration membrane (9) is directly 0.1 μm, the number of the pore diameters of the micro-filtration membrane (9) is 4 hundred million. The design can filter micro impurities such as plastic particles, rubber particles, glass fibers, bacteria, insoluble drug particles and the like in vitro by the microfiltration membrane on the premise of not influencing the infusion speed, thereby effectively and fully ensuring the safety of clinical infusion of patients.

The utility model discloses concrete operation method is the same with ordinary needle of keeping somewhere, and medical personnel need not additionally to study application method the utility model discloses convenient operation makes people accept easily.

The above is only an embodiment of the present invention, and is not intended to limit the present invention, so long as the structure mode and principle of the present invention are satisfied, any modification made, replacement added, etc. should be included in the protection scope of the present invention.

Claims

1. Prevent excessive backward flow of blood and simultaneously filter impurity's microfiltration membrane and keep somewhere needle, keep somewhere needle plastic cannula (1) including what printing opacity material made, connecting pipe seat (2) behind plastic cannula (1), plastic cannula (1) has needle protecting sleeve (3) outward, is equipped with steel needle pipe (4) in plastic cannula (1), and there is sealing plug (5), its characterized in that rear portion in steel needle pipe (4): catheter seat (2) link to each other with bifurcated pipe (7) slope, bifurcated pipe (7) are cylindrical, inside has microfiltration membrane protective housing (8) of slope design, microfiltration membrane protective housing (8) are double-deck oval structure and bifurcated pipe (7) zonulae occludens, there is one deck microfiltration membrane (9) in double-deck microfiltration membrane protective housing (8) the intermediate layer, microfiltration membrane (9) are the ellipse, the microfiltration membrane size, the shape, the direction all is the same and in close contact with microfiltration membrane protective housing (8), return blood chamber (10) and liquid medicine chamber (11) are respectively on double-deck microfiltration membrane protective housing (8) both sides.

2. The microfiltration membrane indwelling needle for preventing excessive blood backflow while filtering foreign substances according to claim 1, wherein: the side wall of the rear part of the steel needle tube (4) is provided with a needle wing (6), and the plate surfaces of the two sides of the needle wing (6) are provided with a plurality of semicircular bulges.

3. The microfiltration membrane indwelling needle for preventing excessive blood backflow while filtering foreign substances according to claim 2, wherein: the sealing plug (5) is tightly attached to the catheter seat (2).

4. The microfiltration membrane indwelling needle for preventing excessive blood backflow while filtering foreign substances according to claim 3, wherein: the liquid medicine cavity (11) is communicated with the extension hose (12), a strip-shaped clamp (13) is arranged on the extension hose (12), a strip-shaped clamp hole (14) is formed in the strip-shaped clamp (13), the aperture of one end of the strip-shaped clamp hole (14) is larger than the diameter of the extension hose (12), and the aperture of the other end of the strip-shaped clamp hole is smaller than the double-wall thickness of the extension hose (12).

5. The microfiltration membrane indwelling needle for preventing excessive blood backflow while filtering foreign substances according to claim 4, wherein: extension hose (12) other end is connected the malleation joint design, and the malleation joint design includes end cap (15), screw connector (16), heparin cap (17).

6. The microfiltration membrane indwelling needle for preventing excessive blood backflow while filtering foreign substances according to claim 5, wherein: the liquid medicine cavity (11) is a right-oblique cutting semi-cylinder, the diameter of the bottom edge of the liquid medicine cavity (11) is 0.5cm, and the height is 1 cm.

7. The microfiltration membrane indwelling needle for preventing excessive blood backflow while filtering foreign substances according to claim 6, wherein: the elliptical micro-filtration membrane (9) can be made of four materials, namely a nylon membrane, a hydrophilic polyvinylidene fluoride membrane, a hydrophilic polytetrafluoroethylene membrane and a hydrophilic polyvinylidene fluoride membrane.

8. The microfiltration membrane indwelling needle for preventing excessive blood backflow while filtering foreign substances according to claim 7, wherein: the short side radius of the oval micro-filtration membrane (9) is 2500 micrometers (mum), the long side radius is 5590 micrometers (mum), and the area is 43905092 mum²The area availability of the micro-filtration membrane (9) is designed to be 70 percent, the diameter of the aperture of the micro-filtration membrane (9) is 0.1 to 1 mu m, and the number of the apertures is 4 to 40 million.