CN215653093U

CN215653093U - Blood return prevention remaining needle and catheter seat assembly thereof

Info

Publication number: CN215653093U
Application number: CN202122087586.8U
Authority: CN
Inventors: 孙军
Original assignee: Suzhou Xinkangdao Medical Technology Co ltd
Current assignee: Suzhou Xinkangdao Medical Technology Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-01-28
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses a catheter seat assembly of an anti-blood-return indwelling needle, which comprises a catheter seat, wherein a valve core pipe and a plastic valve plate are arranged in the catheter seat, and a pipe cavity of the valve core pipe is communicated with a liquid inlet flow channel in the catheter seat to form a liquid channel; one end of the valve core pipe is sealed by the plastic valve plate, so that the liquid channel is sealed; meanwhile, at least one of the valve core pipe and the plastic valve plate is arranged in the conduit seat in a sliding manner; when the valve core pipe and the plastic valve plate move relatively, the valve core pipe pierces the plastic valve plate and conducts the liquid channel. When the catheter holder assembly is applied to an indwelling needle, the catheter holder assembly can block blood return at the front end of the catheter holder so as to avoid blood-borne pollution. In addition, the indwelling needle assembled by the catheter holder component has simple structure and convenient operation.

Description

Blood return prevention remaining needle and catheter seat assembly thereof

Technical Field

The utility model relates to the field of medical instruments, in particular to a blood return prevention indwelling needle and a catheter holder assembly thereof.

Background

Intravenous infusion is the most common medical treatment means, and the basic principle is to input liquid into the venous blood vessel of a human body through an infusion pipeline and a hollow needle. When infusion is started, the hollow needle needs to be punctured into a vein. The puncture process needs to be repeated every time due to the need of repeated infusion.

In order to protect the blood vessel, the blood vessel injury and the mental pain of the patient caused by repeated puncture are reduced; the patient can move and carry the infusion bag easily, and the infusion leakage is reduced; the vein channel is kept smooth at any time, so that the medicine is convenient to be administered in time and emergently rescued; the workload of nurses is reduced, and the working efficiency is improved. Therefore, indwelling needles have been widely used clinically in recent years.

After the traditional pen-holder type indwelling needle successfully punctures the catheter and enters the blood vessel, because the infusion interface at the tail end of the catheter is in an open state, a medical worker must rapidly draw out the puncture steel needle and simultaneously press the puncture part with the other hand after the puncture is successful, the aim is to ensure that the catheter detained in the blood vessel is temporarily collapsed and closed, and the problem that blood flows out from the open infusion interface of the catheter to cause hematogenous pollution when the medical worker does not reach to connect the infusion interface at the tail end of the catheter with other infusion devices due to the blood pressure effect of a human body is avoided.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides the blood return prevention indwelling needle and the catheter seat assembly thereof, wherein the catheter seat assembly can block the blood return at the front end of the catheter seat so as to avoid blood-borne pollution.

In order to achieve the purpose, the utility model provides the following technical scheme: the catheter seat assembly of the anti-blood-return indwelling needle comprises a catheter seat, wherein a valve core pipe and a plastic valve plate are arranged in the catheter seat, and a pipe cavity of the valve core pipe is communicated with a liquid inlet flow passage in the catheter seat to form a liquid passage;

one end of the valve core pipe is sealed by the plastic valve plate, so that the liquid channel is sealed; meanwhile, at least one of the valve core pipe and the plastic valve plate is arranged in the conduit seat in a sliding manner; when the valve core pipe and the plastic valve plate move relatively, the valve core pipe pierces the plastic valve plate and conducts the liquid channel.

When the catheter seat assembly is applied to the indwelling needle, the steel needle penetrates through the valve core tube, the plastic valve plate, the catheter seat and the outer needle tube. When the medical care personnel successfully puncture and pull out the steel needle, the plastic valve plate seals the valve core tube, the blood return is blocked at the front end of the catheter seat, and the back end of the catheter seat has no blood return to flow out, thereby avoiding the blood source pollution. When the infusion device is assembled to be connected with the catheter base, the luer cone head on the infusion device pushes the valve core pipe or the plastic valve plate to move, even if the valve core pipe and the plastic valve plate move relatively, the valve core pipe penetrates through the plastic valve plate and conducts the liquid channel, and therefore the infusion channel between the infusion device and the catheter base is established.

Preferably, a cavity is arranged in the conduit seat, the valve core pipe is fixed in the cavity, and a pipe cavity of the valve core pipe is communicated with a liquid inlet flow passage in the conduit seat to form a liquid channel; the cavity is internally provided with the plastic valve plate in a sliding mode and is positioned behind the valve core pipe, and the valve core pipe is sealed by the plastic valve plate.

Preferably, a cavity is arranged in the catheter seat, the valve core pipe is arranged in the cavity in a sliding mode, the plastic valve plate is fixed in the cavity in front of the valve core pipe, and the valve core pipe is sealed by the plastic valve plate.

Preferably, the center of the plastic valve plate is punctured.

Preferably, the pipe wall of the rear part of the valve core pipe is in a sawtooth shape.

Preferably, the plastic valve plate comprises a valve plate main body and a convex ring integrally formed with the valve plate main body, and the convex ring is sleeved on the valve core pipe.

Preferably, the outer peripheral wall of the valve plate main body is attached to the inner wall of the cavity.

The blood return prevention indwelling needle comprises the catheter seat assembly, wherein the catheter seat assembly is inserted into a steel needle seat, a steel needle is fixed on the steel needle seat, and the steel needle penetrates through a valve core tube, a plastic valve plate and a catheter seat.

In conclusion, the utility model has the following beneficial effects:

1. when the catheter seat assembly is applied to the indwelling needle, the steel needle penetrates through the valve core tube, the plastic valve plate, the catheter seat and the outer needle tube; when the medical care personnel successfully puncture and pull out the steel needle, the plastic valve plate seals the valve core tube, the blood return is blocked at the front end of the catheter seat, and the back end of the catheter seat has no blood return to flow out, thereby avoiding the blood source pollution; when the infusion device is assembled to be connected with the catheter seat, the luer cone head on the infusion device enables the valve core pipe and the plastic valve plate to move relatively, the valve core pipe penetrates through the plastic valve plate and conducts the liquid channel, and therefore the infusion channel between the infusion device and the catheter seat is established; therefore, enough time can be left for medical staff, and the infusion device is convenient to connect;

2. the remaining needle has simple structure and convenient operation.

Drawings

FIG. 1 is a schematic view showing the structure of an indwelling needle;

FIG. 2 is a schematic view of the catheter hub separated from the steel needle hub;

FIG. 3 is an enlarged view taken at A in FIG. 2;

fig. 4 is a schematic diagram of the catheter hub with an infusion set attached.

Reference numerals: 1. a catheter hub; 2. a valve core tube; 3. a plastic valve plate; 4. an infusion device; 5. a valve plate main body; 6. a convex ring; 7. a steel needle seat; 8. a steel needle; 9. an outer needle tube; 10. a sheath.

Detailed Description

The utility model is further described with reference to the accompanying drawings.

The embodiment discloses a blood return prevention indwelling needle and a catheter seat assembly thereof, as shown in fig. 1-4, the catheter seat 1 assembly comprises a catheter seat 1, a liquid inlet flow channel is arranged at the front end of the catheter seat 1, a valve core tube 2 and a plastic valve plate 3 are arranged in the catheter seat 1, and a tube cavity of the valve core tube 2 is communicated with the liquid inlet flow channel in the catheter seat 1 to form a liquid channel; one end of the valve core pipe 2 is sealed by the plastic valve plate 3, so that the liquid channel is sealed; meanwhile, at least one of the valve core tube 2 and the plastic valve plate 3 is arranged in the conduit seat 1 in a sliding manner; the root of the valve core pipe is provided with a liquid return groove which can prevent the periphery of the valve core pipe and the plastic valve plate from forming a dead space; when the valve core tube 2 and the plastic valve plate 3 move relatively, the valve core tube 2 pierces the plastic valve plate 3 and conducts the liquid channel.

When the catheter base assembly is applied to the indwelling needle, the steel needle 8 passes through the valve core tube 2, the plastic valve plate 3, the catheter base 1 and the outer needle tube 9. When the medical care personnel successfully puncture and pull out the steel needle 8, the plastic valve plate 3 seals the valve core tube 2, the blood return is blocked at the front end of the catheter seat 1, and the back end of the catheter seat 1 has no blood return to flow out, thereby avoiding the blood source pollution. When the infusion device 4 is assembled to be connected with the catheter hub 1, the luer taper on the infusion device 4 pushes the valve core tube 2 or the plastic valve sheet 3 to move, even if the two move relatively, the valve core tube 2 penetrates through the plastic valve sheet 3 and conducts the liquid channel, so that the infusion channel between the infusion device 4 and the catheter hub 1 is established.

In some embodiments, a cavity is arranged in the catheter base 1, the valve core tube 2 is fixed in the cavity, and a tube cavity of the valve core tube 2 is communicated with a liquid inlet flow channel in the catheter base 1 and forms a liquid channel; the cavity is provided with a plastic valve plate 3 at the rear of the valve core tube 2 in a sliding way, and the valve core tube 2 is sealed by the plastic valve plate 3. When the catheter base 1 assembly is applied to an indwelling needle, the steel needle 8 passes through the valve core tube 2, the plastic valve plate 3, the catheter base 1 and the outer needle tube 9. When the medical care personnel successfully puncture and pull out the steel needle 8, the plastic valve plate 3 seals the valve core tube 2, the blood return is blocked at the front end of the catheter seat 1, and the back end of the catheter seat 1 has no blood return to flow out, thereby avoiding the blood source pollution. When the infusion device 4 is assembled to connect with the catheter hub 1, the luer taper on the infusion device 4 pushes the plastic valve plate 3 forward, and the valve core tube 2 penetrates through the plastic valve plate 3 and conducts the liquid channel, so that an infusion channel between the infusion device 4 and the catheter hub 1 is established.

In other embodiments, a cavity is provided in the catheter base 1, the valve core tube 2 is slidably disposed in the cavity, the plastic valve sheet 3 is fixed in the cavity in front of the valve core tube 2, and the valve core tube 2 is sealed by the plastic valve sheet 3. When the catheter base 1 assembly is applied to an indwelling needle, the steel needle 8 passes through the valve core tube 2, the plastic valve plate 3, the catheter base 1 and the outer needle tube 9. When the medical care personnel successfully puncture and pull out the steel needle 8, the plastic valve plate 3 seals the valve core tube 2, the blood return is blocked at the front end of the catheter seat 1, and the back end of the catheter seat 1 has no blood return to flow out, thereby avoiding the blood source pollution. When the infusion device 4 is assembled to be connected with the catheter base 1, the luer taper head on the infusion device 4 pushes the valve core tube 2 forward, the valve core tube 2 penetrates through the plastic valve plate 3 and is communicated with the liquid inlet flow channel in the catheter base 1 and the tube cavity of the valve core tube 2, so that the liquid channel is communicated, and the infusion channel between the infusion device 4 and the catheter base 1 is established.

In the above technical solution, preferably, the center of the plastic valve plate 3 is punctured; thus, the steel needle 8 and the valve core tube 2 can be punctured conveniently. Further, the pipe wall of the rear part of the valve core pipe 2 is in a sawtooth shape. Thus, the puncture of the valve core pipe 2 is facilitated.

The plastic valve plate 3 comprises a valve plate main body 5 and a convex ring 6 integrally formed with the valve plate main body 5, and the convex ring 6 is sleeved on the valve core pipe 2. In addition, the outer peripheral wall of the valve sheet main body 5 is attached to the inner wall of the chamber, so that liquid does not leak between the two.

The blood return prevention indwelling needle comprises the catheter seat 1 assembly of the blood return prevention indwelling needle, a steel needle seat 7 is inserted on the catheter seat 1, a steel needle 8 is fixed on the steel needle seat 7, and the steel needle 8 penetrates through the valve core tube 2, the plastic valve plate 3 and the catheter seat 1; the front end of the catheter holder 1 is also fixed with an outer needle tube 9, and the catheter holder 1 is also sleeved with a sheath 10. The remaining needle has simple structure and convenient operation.

In the present invention, it should be understood that the terms "front", "back", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, and thus, should not be construed as limiting the present invention.

The directions given in the present embodiment are merely for convenience of describing positional relationships between the respective members and the relationship of fitting with each other. The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. Prevent back blood catheter holder subassembly of needle of keeping somewhere, including catheter holder (1), characterized by: a valve core pipe (2) and a plastic valve plate (3) are arranged in the catheter seat (1), and a pipe cavity of the valve core pipe (2) is communicated with a liquid inlet flow channel in the catheter seat (1) to form a liquid channel;

one end of the valve core pipe (2) is sealed by the plastic valve plate (3) so as to seal the liquid channel; meanwhile, at least one of the valve core tube (2) and the plastic valve plate (3) is arranged in the conduit seat (1) in a sliding manner; when the valve core pipe (2) and the plastic valve plate (3) move relatively, the valve core pipe (2) pierces the plastic valve plate (3) and leads the liquid channel to be conducted.

2. The catheter hub assembly of an anti-flashback indwelling needle according to claim 1, wherein: a cavity is arranged in the catheter seat (1), the valve core tube (2) is fixed in the cavity, and a tube cavity of the valve core tube (2) is communicated with a liquid inlet flow channel in the catheter seat (1) to form a liquid channel; the plastic valve plate (3) is arranged in the cavity behind the valve core pipe (2) in a sliding mode, and the valve core pipe (2) is sealed by the plastic valve plate (3).

3. The catheter hub assembly of an anti-flashback indwelling needle according to claim 1, wherein: the novel valve core is characterized in that a cavity is arranged in the conduit seat (1), the valve core pipe (2) is arranged in the cavity in a sliding mode, the plastic valve block (3) is fixed in the cavity in front of the valve core pipe (2), and the valve core pipe (2) is sealed by the plastic valve block (3).

4. The catheter hub assembly of an anti-flashback indwelling needle according to claim 2 or 3, wherein: the center of the plastic valve plate (3) is punctured.

5. The catheter hub assembly of an anti-flashback indwelling needle according to claim 2 or 3, wherein: the pipe wall of the rear part of the valve core pipe (2) is in a sawtooth shape.

6. The catheter hub assembly of an anti-flashback indwelling needle according to claim 2 or 3, wherein: the plastic valve plate (3) comprises a valve plate main body (5) and a convex ring (6) integrally formed with the valve plate main body (5), and the convex ring (6) is sleeved on the valve core pipe (2).

7. The catheter hub assembly of an anti-flashback indwelling needle according to claim 6, wherein: the periphery wall of the valve plate main body (5) is attached to the inner wall of the cavity.

8. The blood return prevention indwelling needle is characterized in that: the catheter seat assembly comprising the anti-blood-return remaining needle as claimed in any one of claims 1 to 7, wherein a steel needle seat (7) is inserted into the catheter seat (1), a steel needle (8) is fixed on the steel needle seat (7), and the steel needle (8) penetrates through the valve core tube (2), the plastic valve plate (3) and the catheter seat (1).