CN219398502U - Remaining needle for preventing blood from flowing reversely - Google Patents

Abstract

The utility model belongs to the technical field of medical equipment, and specifically relates to an indwelling needle for preventing blood backflow, which mainly solves the problem of blood overflowing from a catheter seat caused by the pressure difference inside and outside a blood vessel or improper operation techniques during the process of pulling out a steel pipe needle after puncturing the indwelling needle; mainly by setting a cannula partially left in the patient's body, driving the puncture part of the cannula part entering the patient's body, setting a check assembly in the cannula to prevent blood backflow, and an infusion unit connected with the cannula and used to connect a syringe; prevent blood backflow and overflow, And carry out normal infusion operation to the patient.

Description

An indwelling needle for preventing blood reflux

technical field

The utility model belongs to the technical field of medical instruments, in particular to an indwelling needle for preventing blood backflow.

Background technique

Existing indwelling needles include intravenous indwelling needles, also known as trocars, which are generally used clinically to infuse medicinal solutions to patients, because they have the advantages of reducing the number of blood vessel punctures and rapid infusion, which are beneficial to alleviate the pain of patients and facilitate rescue.

However, when the existing indwelling needle is punctured and the steel pipe needle is pulled out, due to the pressure difference inside and outside the blood vessel or improper operation techniques, the blood in the vein will flow out of the catheter base under pressure to form blood pollution, so it also brings great inconvenience to the medical staff.

The utility model aims at the above problems and provides an indwelling needle for preventing blood backflow.

Utility model content

In order to overcome the problems proposed in the background technology, the utility model adopts the following technical solutions:

An indwelling needle for preventing blood reflux, comprising:

A sleeve, the sleeve includes an internal part and an external part, one end of the internal part is connected to one end of the external part, wherein the external part is provided with a first cavity, and the internal part is set to be hollow and communicated with the first cavity; the internal part is placed in the human body;

an infusion set, used for connecting a syringe, the infusion set is connected to the extracorporeal part, and the infusion set communicates with the first cavity;

The puncture part, the puncture part includes: 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 the needle holder is in contact with the outer wall of the extracorporeal part;

The non-return assembly is used to prevent blood backflow. The non-return assembly is arranged at the connection between the external part and the internal part, and the non-return assembly is located in the first cavity. After the puncture needle is separated from the first cavity and the internal part, the non-return assembly can prevent blood from flowing back into the first cavity. After the connector is connected to a syringe to inject liquid, the non-return assembly is under positive pressure, so that the first cavity communicates with the internal part.

A closure is provided in the first cavity, and one end of the puncture needle pierces the closure and extends into the first cavity.

Further, the closure member includes: a butyl rubber stopper, and the butyl rubber stopper is fixedly arranged in the first cavity.

The extracorporeal part further includes: a sealing plug, wherein the sealing plug is detachably connected to the extracorporeal part, and can seal the first cavity after the sealing plug is connected to the extracorporeal part.

Further, the sealing plug is threadedly connected to the extracorporeal part.

The non-return assembly includes: a valve, the valve is elastic, and the valve is hollow and tapered toward the end of the inner part that is not connected to the outer part. The valve is uniformly opened with several slits along its radial direction from the center to divide the valve into multiple valve units.

Further, the valve is made of high elastic resin material.

The infusion set includes: an infusion tube and an infusion connector, wherein one end of the infusion tube is connected to the extracorporeal part and communicates with the first cavity, and the other end of the infusion tube is connected to the infusion connector.

Further, a sealing cover is provided to be connected with the infusion joint, and when in use, the sealing cover can completely cover a port of the infusion joint, and the sealing cover can be detached from a port of the infusion joint.

Further, the sealing cap is threadedly connected to the infusion connector.

The beneficial effects of the utility model:

1. By setting the non-return assembly, it is possible to prevent the patient's blood from flowing back after the puncture needle is withdrawn from the patient's body, and during infusion, the non-return assembly is pushed away by the liquid medicine to realize the delivery of the medicine.

2. After the puncture needle is withdrawn by setting the closure member, one port of the first cavity remains closed, preventing blood from overflowing from the first cavity.

Description of drawings

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

Fig. 2 is the schematic diagram of the sectional structure of the casing of the utility model;

Fig. 3 is a schematic diagram of the structure of the utility model after the sleeve and the puncture part are separated;

Fig. 4 is a schematic diagram of the structure in the first cavity of the present invention;

Fig. 5 is a structural schematic diagram of the infusion connector of the present invention;

Fig. 6 is a schematic diagram of the casing structure of the utility model;

In the figure, 1, the external part; 11, the first cavity; 12, the closure; 13, the sealing plug; 14, the valve; 2, the internal part; 3, the infusion tube; 31, the infusion joint; 32, the sealing cover; 4, the puncture needle; 41, the needle holder.

Detailed ways

The technical solutions in the embodiments of the utility model are clearly and completely described below through specific specific examples. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all embodiments. Those skilled in the art can easily understand other advantages and effects of the utility model from the contents disclosed in this specification. The utility model can also be implemented or applied through other different specific implementation modes. In the case of no conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without making creative work all belong to the protection scope of the utility model.

1-3 show the main technical content of this embodiment. This specific embodiment provides an indwelling needle for preventing blood reflux, which includes a cannula. The sleeve includes an internal body part 2 and an external body part 1. One end of the internal body part 2 is 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 set to be hollow and communicated with the first cavity 11; the internal body part 2 is placed in the human body;

An infusion set is used for connecting a syringe, the infusion set is connected with the extracorporeal part 1 , and the infusion set communicates with the first cavity 11 .

The puncture part, the puncture part includes: a puncture needle 4 and a needle holder 41, wherein the puncture needle 4 passes through the first cavity 11 and the inner body part 2, and can be separated 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 in contact with the outer wall of the extracorporeal part 1;

The non-return assembly is used to prevent the backflow of blood. The non-return assembly is arranged at the connection between the external body 1 and the internal body 2, and the non-return assembly is located in the first cavity 11. After the puncture needle 4 is separated from the first cavity 11 and the internal body 2, the non-return assembly can prevent blood from flowing back into the first cavity 11. After the connector is connected to a syringe to inject liquid, the non-return assembly is under positive pressure, so that the first cavity 11 communicates with the internal body 2.

Referring to FIG. 1 , in this embodiment, the external part 1 is a hard part, and the internal part 2 is a soft part, wherein the external part 1 is made of thermoplastic, preferably medical grade polycarbonate, and the internal part 2 is made of silicone rubber, preferably medical grade silicone rubber; the external part 1 and the internal part 2 made of the above materials have good visibility, and after the internal part 2 enters the patient's body with the puncture needle 4, the blood return situation can be visually judged.

1-3, in this embodiment, the first cavity 11 is provided with a first port, wherein the puncture needle 4 has a first port to penetrate and withdraw, and a closure 12 is provided in the first cavity 11 to keep the first cavity 11 in a sealed state after the puncture needle 4 withdraws from the first cavity 11 to prevent blood from overflowing through the first port.

2-3, in this embodiment, after the puncture needle 4 is withdrawn from the closure 12, the needle hole existing on the closure 12 can be quickly closed. Therefore, 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.

1-4, in this embodiment, the extracorporeal part 1 further includes: a sealing plug 13, wherein the sealing plug 13 is detachably connected to the extracorporeal part 1, preferably threaded, and after the puncture needle 4 is not connected to the extracorporeal part 1 and the inner body part 2, the sealing plug 13 is screwed to the first port to prevent foreign matter from entering the first cavity 11.

3-4, in this embodiment, the non-return assembly is similar to the three-way valve 14 in the heart, which specifically includes: a valve 14, which is hollow and conical toward the end of the internal body 2 that is not connected to the external body 1. The valve 14 is uniformly opened with several slits along its radial direction from the center to divide the valve 14 into multiple valve 14 units. In the cavity 11, when the patient is punctured, the blood return of the patient can be observed through the internal part 2 and the external part 1; after the puncture needle 4 withdraws from the multiple valves 14 units, the multiple valves 14 units with elasticity are automatically closed to prevent blood backflow.

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

5-6, in this embodiment, the infusion set includes: an infusion tube 3 and an infusion connector 31; wherein, the infusion tube 3 is a hollow structure, one end of the infusion tube 3 is connected to the external part 1 and communicates with the first cavity 11, the other end of the infusion tube 3 is connected to the infusion connector 31, and the infusion device is externally connected through the infusion connector 31, so that the medicinal solution enters the first cavity 11 through the infusion connector 31 through the infusion tube 3 until it is delivered to the patient.

In order to keep the cleanliness of the infusion joint 31 and to prevent foreign matter from entering the infusion joint 31, in this embodiment, a sealing cover 32 is provided to be connected to the infusion joint 31, wherein the sealing cover 32 can be disassembled from the infusion joint 31. Preferably, the sealing cover 32 is threadedly connected to the infusion joint 31. When in use, the sealing cover 32 can completely cover one port of the infusion joint 31.

In addition, a connection section is provided between the sealing cap 32 and the infusion connector 31 , so that the sealing cap 32 can be prevented from being discarded after the sealing cap 32 is detached from the infusion connector 31 .

1-2, in this embodiment, the puncture needle 4 is made of medical stainless steel, wherein one end of the puncture needle 4 is set as a sharp end for puncturing the patient's skin tissue, the needle holder 41 is made of hard material, and the puncture needle 4 and the needle holder 41 are fixedly connected.

The using method of the utility model:

When in use, the cannula and the puncture part are in a combined state, and the needle holder is used to place the puncture needle together with the body part of the cannula into the patient's blood vessel, and then the puncture needle is withdrawn through the needle holder, and the body part of the cannula is left in the patient's body. After the puncture needle exits the cannula, the valve is closed to prevent blood from flowing back into the first cavity. , so that the liquid medicine is delivered to the patient's body through the body part, and after the infusion is completed, the infusion joint is sealed with a sealing cap.

The description of the above embodiment is only for understanding the utility model. It should be pointed out that those skilled in the art can make some improvements to the utility model without departing from the principle of the utility model, and these improvements will also fall within the protection scope of the claims of the utility model.

Claims (10)

1. 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.

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.