CN219398502U

CN219398502U - Remaining needle for preventing blood from flowing reversely

Info

Publication number: CN219398502U
Application number: CN202223519380.9U
Authority: CN
Inventors: 顾晓凤; 易雯雯; 沙俊欧
Original assignee: Liangshan Yizu Autonomous Prefecture No1 People's Hospital Liangshan Prefecture Infectious Disease Hospital
Current assignee: Liangshan Yizu Autonomous Prefecture No1 People's Hospital Liangshan Prefecture Infectious Disease Hospital
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-07-25
Anticipated expiration: 2032-12-28

Abstract

The utility model belongs to the technical field of medical equipment, and particularly relates to an indwelling needle for preventing blood from flowing backwards, which mainly solves the problem that blood overflows a catheter seat caused by pressure difference inside and outside a blood vessel or improper operation method in the process that the indwelling needle is used for puncturing and pulling out a steel tube needle; the device mainly comprises a sleeve part which is arranged in a patient, a puncture part which drives the sleeve part to enter the patient, a non-return component which is arranged in the sleeve and used for preventing blood from flowing back, and an infusion component which is connected with the sleeve and used for connecting a syringe; preventing reflux and overflow of blood and normal transfusion operation to patients.

Description

Remaining needle for preventing blood from flowing reversely

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to an indwelling needle for preventing blood from flowing reversely.

Background

The existing indwelling needle is provided with a venous indwelling needle, also called a trocar, and is generally applied to infusing liquid medicine to a patient clinically, and has the advantages of reducing the blood vessel puncture times and rapidly infusing, being beneficial to alleviating the pain of the patient, facilitating the rescue and the like; the most commonly used indwelling needle at present is used by sleeving a trocar catheter into a steel tube needle, then performing venipuncture on a patient, and after the puncture is completed, pulling out the steel tube needle, and the trocar catheter is remained in the patient.

However, in the process of pulling out the steel tube needle after the puncture is completed, the existing indwelling needle can cause blood pollution caused by the fact that intravenous blood flows out of the catheter seat under the action of pressure due to pressure difference between the inside and the outside of a blood vessel or improper operation method, so that great inconvenience is brought to medical staff.

The present utility model is made in view of the above-described problems, and provides an indwelling needle for preventing backflow of blood.

Disclosure of Invention

In order to overcome the problems in the background art, the utility model adopts the following technical scheme:

an indwelling needle for preventing blood reflux, comprising:

the sleeve comprises an internal part and an external part, wherein one end of the internal part is connected with one end of the external part, a first cavity is arranged on the external part, and the internal part is hollow and communicated with the first cavity; the in-vivo portion is disposed in a human body;

the infusion assembly is used for being connected with the injector, is connected with the external part and is communicated with the first cavity;

a piercing member, the piercing member comprising: a puncture needle and a needle holder, wherein the puncture needle passes through the first cavity and the inner body part and can be separated from the first cavity and the inner body part; the needle holder is arranged at one end of the puncture needle and is connected with the outer wall of the external part;

the non return subassembly is used for preventing blood backward flow, the non return subassembly set up in the junction of external part and internal part, just the non return subassembly is located in the first cavity, wherein, after the pjncture needle breaks away from first cavity with internal part, the non return subassembly can prevent blood backward flow to in the first cavity after the connector connects the syringe injection liquid, the non return subassembly receives the malleation, makes first cavity with internal part communicates with each other.

A sealing piece is arranged in the first cavity, and one end of the puncture needle pierces the sealing piece and stretches into the first cavity.

Further, the closure comprises: the butyl rubber plug is fixedly arranged in the first cavity.

The extracorporeal portion further comprises: the sealing plug is detachably connected with the external part, and the first cavity can be sealed after the sealing plug is connected with the external part.

Further, the sealing plug is in threaded connection with the external portion.

The check assembly includes: the valve has elasticity, is hollow and faces the cone-shaped part of the internal part, and is not connected with the external part, and a plurality of slits are evenly formed in the valve along the radial direction of the valve from the center to divide the valve into a plurality of valve units.

Further, the valve is made of high-elasticity resin.

The infusion assembly includes: the infusion tube comprises an infusion tube and an infusion connector, wherein one end of the infusion tube is connected to the external part and communicated with the first cavity, and the other end of the infusion tube is connected with the infusion connector.

Further, a sealing cover is arranged to be connected with the infusion connector, when the infusion connector is used, one port of the infusion connector can be completely covered by the sealing cover, and the sealing cover can be separated from one port of the infusion connector.

Further, the sealing cover is in threaded connection with the infusion connector.

The utility model has the beneficial effects that:

1. through setting up the non return subassembly can prevent to withdraw the back in the patient at the pjncture needle, patient's blood backward flow to and when the infusion, the non return subassembly receives the liquid medicine to jack-up, realizes carrying the medicine.

2. After the puncture needle is withdrawn by arranging the sealing piece, one port of the first cavity is kept sealed, and blood is prevented from overflowing out of the first cavity.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of a sleeve according to the present utility model;

FIG. 3 is a schematic view of the cannula of the present utility model shown separated from the piercing member;

FIG. 4 is a schematic view of the first chamber of the present utility model;

FIG. 5 is a schematic view of the structure of the infusion connector of the present utility model;

FIG. 6 is a schematic view of a sleeve structure according to the present utility model;

in the figure, 1, the in vitro part; 11. a first cavity; 12. a closure; 13. a sealing plug; 14. a valve; 2. an inner body portion; 3. an infusion tube; 31. an infusion connector; 32. sealing cover; 4. a puncture needle; 41. and (5) holding the needle.

Detailed Description

The following detailed description of the embodiments of the present utility model will be made more apparent to those skilled in the art from the following detailed description, in which the utility model is embodied in several, but not all, embodiments of the utility model. The utility model may be embodied or applied in other specific forms and features of the following examples and examples may be combined with each other without conflict, all other examples being contemplated by those of ordinary skill in the art without undue burden from the present disclosure, based on the examples of the utility model.

1-3, which illustrate the main technical content of the present embodiment, the present embodiment provides an indwelling needle for preventing backflow of blood, comprising a cannula including an internal body part 2 and an external body part 1, one end of the internal body part 2 being connected to one end of the external body part 1, wherein the external body part 1 is provided with a first cavity 11, and the internal body part 2 is provided to be hollow and is communicated with the first cavity 11; the in-vivo part 2 is placed in a human body;

the infusion assembly is used for being connected with the injector, is connected with the external part 1 and is communicated with the first cavity 11.

A piercing member, the piercing member comprising: a puncture needle 4 and a needle holder 41, wherein the puncture needle 4 penetrates through the first cavity 11 and the inner body part 2 and is separable from the first cavity 11 and the inner body part 2; the needle holder 41 is arranged at one end of the puncture needle 4, and the needle holder 41 is connected with the outer wall of the external part 1;

the check assembly is used for preventing blood backflow, the check assembly is arranged at the joint of the external part 1 and the internal part 2, and the check assembly is positioned in the first cavity 11, wherein after the puncture needle 4 is separated from the first cavity 11 and the internal part 2, the check assembly can prevent blood from flowing back into the first cavity 11, and after the connector is connected with the injector for injecting liquid, the check assembly is subjected to positive pressure, so that the first cavity 11 is communicated with the internal part 2.

Referring to fig. 1, in the present embodiment, the outer body part 1 is a hard part and the inner body part 2 is a soft part, wherein the outer body part 1 is made of thermoplastic, preferably medical grade polycarbonate, and the inner body part 2 is made of silicone rubber, preferably medical grade silicone rubber; the external part 1 and the internal part 2 made of the materials have good visibility, and can intuitively judge the blood return condition after the internal part 2 enters the patient along with the puncture needle 4.

Referring to fig. 1-3, in the present embodiment, the first cavity 11 is provided with a first port, wherein the puncture needle 4 has a first port for insertion and withdrawal, and a closure member 12 is provided in the first cavity 11 for maintaining the first cavity 11 in a sealed state after the puncture needle 4 is withdrawn from the first cavity 11, preventing blood from overflowing from the first port.

Referring to fig. 2-3, in this embodiment, after withdrawal of the needle 4 from the closure 12, the presence of the eye of the needle on the closure 12 enables a quick closure, so that in this embodiment the closure 12 is made of butyl rubber and the closure 12 is fixedly arranged in the first cavity 11, and the closure 12 is not flush with the first port.

Referring to fig. 1-4, in this embodiment, the extracorporeal portion 1 further comprises: a sealing plug 13, wherein the sealing plug 13 is detachably connected to the external body part 1, wherein preferably a threaded connection is provided, and the sealing plug 13 is screwed to the first port after the puncture needle 4 is not connected to the external body part 1, the internal body part 2, for preventing foreign objects from entering the first cavity 11.

Referring to fig. 3-4, in this embodiment, the check assembly resembles an intra-cardiac three-way valve 14, which specifically includes: a valve 14, wherein the valve 14 is hollow and is conical towards one end of the inner body part 2 which is not connected with the outer body part 1, a plurality of slits are uniformly formed in the radial direction of the valve 14 from the center to divide the valve 14 into a plurality of valve 14 units, wherein when the puncture needle 4 passes through the valve 14, the plurality of valve 14 units are in an open state, so that blood can flow into the first cavity 11 from the human body end, and when a patient is punctured, the patient can be observed to return blood through the inner body part 2 and the outer body part 1; after the puncture needle 4 withdraws from the plurality of valve 14 units, the plurality of valve 14 units with elasticity are automatically closed to prevent blood backflow, when the infusion assembly is connected with an infusion apparatus to infuse a patient, the liquid medicine is conveyed into the first cavity 11, positive pressure is generated in the first cavity 11, and therefore the plurality of valve 14 units are ejected, and the liquid medicine is conveyed into the patient through the internal body part 2.

In addition, the valve 14 is made of high-elasticity resin material, so that the valve 14 has good elasticity.

Referring to fig. 5-6, in this embodiment, an infusion set includes: a transfusion tube 3 and a transfusion joint 31; wherein, the infusion tube 3 is hollow structure, one end of the infusion tube 3 is connected to the external part 1 and is communicated with the first cavity 11, the other end of the infusion tube 3 is connected with the infusion connector 31, and the infusion connector 31 is externally connected with an infusion apparatus, so that the liquid medicine enters the first cavity 11 from the infusion connector 31 through the infusion tube 3 until being conveyed into a patient.

In order to maintain the cleanliness of the infusion connector 31 and prevent foreign matters from entering the infusion connector 31, in this embodiment, a sealing cover 32 is provided to be connected with the infusion connector 31, wherein the sealing cover 32 can be detached from the infusion connector 31, preferably, the sealing cover 32 is in threaded connection with the infusion connector 31, and in use, the sealing cover 32 can completely cover one port of the infusion connector 31.

In addition, a connecting section is further provided between the sealing cover 32 and the infusion connector 31, so that the sealing cover 32 can be prevented from being discarded after the sealing cover 32 is separated from the infusion connector 31.

Referring to fig. 1-2, in the present embodiment, the puncture needle 4 is made of medical stainless steel, wherein one end of the puncture needle 4 is provided as a sharp end for puncturing skin tissue of a patient, the needle holder 41 is made of hard material, the puncture needle 4 and the needle holder 41 are fixedly connected, and the puncture needle 4 is withdrawn from the patient and the cannula by holding the needle holder 41 in use.

The application method of the utility model comprises the following steps:

when the infusion device is used, the sleeve and the puncture part are in a combined state, the puncture needle is cooperated with the internal part of the sleeve by holding the needle, the puncture needle is withdrawn by holding the needle, the internal part of the sleeve is reserved in a patient, after the puncture needle is withdrawn from the sleeve, the valve is closed to prevent blood from flowing back into the first cavity, the first cavity is closed by using the sealing piece, the infusion device is connected through the infusion assembly, so that liquid medicine is conveyed into the first cavity, positive pressure is generated in the first cavity, a plurality of valve units are jacked up, the liquid medicine is conveyed into the patient through the internal part, and after the infusion is completed, the infusion connector is sealed by using the sealing cover.

The above description of embodiments is only for the understanding of the present utility model. It should be noted that it will be apparent to those skilled in the art that modifications can be made to the present utility model without departing from the principles of the utility model, and such modifications will fall within the scope of the claims.

Claims

1. An indwelling needle for preventing blood reflux, comprising:

2. The needle of claim 1, wherein a closure is disposed within the first lumen, and wherein one end of the needle pierces the closure and protrudes into the first lumen.

3. The needle of claim 2, wherein the closure comprises: the butyl rubber plug is fixedly arranged in the first cavity.

4. The blood reflux-preventing indwelling needle according to claim 1, wherein said extracorporeal portion further comprises: the sealing plug is detachably connected with the external part, and the first cavity can be sealed after the sealing plug is connected with the external part.

5. An indwelling needle for preventing backflow of blood as claimed in claim 4, in which said sealing plug is threadably connected to said extracorporeal portion.

6. The needle of claim 1, wherein the non-return assembly comprises: the valve has elasticity, is hollow and faces the cone-shaped part of the internal part, and is not connected with the external part, and a plurality of slits are evenly formed in the valve along the radial direction of the valve from the center to divide the valve into a plurality of valve units.

7. The needle of claim 6, wherein the valve is made of a highly elastic resin.

8. The needle of claim 1, wherein the infusion set comprises: the infusion tube comprises an infusion tube and an infusion connector, wherein one end of the infusion tube is connected to the external part and communicated with the first cavity, and the other end of the infusion tube is connected with the infusion connector.

9. An indwelling needle for preventing backflow of blood as claimed in claim 8, in which a sealing cap is provided in connection with said infusion connector, said sealing cap being capable of fully covering a port of said infusion connector and being capable of disengaging from a port of said infusion connector in use.

10. The needle of claim 9, wherein the sealing cap is screwed to the infusion connector.