CN216366183U

CN216366183U - Safety retention needle for dialysis

Info

Publication number: CN216366183U
Application number: CN202122738565.8U
Authority: CN
Inventors: 王倩倩
Original assignee: 6th Medical Center of PLA General Hospital
Current assignee: 6th Medical Center of PLA General Hospital
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-04-26
Anticipated expiration: 2031-11-10

Abstract

The utility model discloses a safe indwelling needle for dialysis, which comprises a trocar, a needle core, a tampon, a needle cap, a soft extension tube and a single-hand clamp. The needle tube main part of trocar is soft main part, and the main part of nook closing member passes the tampon and nests in the needle tube main part of trocar, and nook closing member end and trocar end are equipped with the draw-in groove of holding each other along the puncture direction, are equipped with operating handle on the flank that is close to the nook closing member end, and extension pipe side direction is connected on the output channel of trocar, and extension pipe end is equipped with two connectors, and the centre gripping is pressed from both sides on the extension pipe to the one hand. The soft trocar can effectively protect the internal fistula blood vessel, alleviates the damage of steel needle to the vascular wall in the past, has prominent step operating handle, and it is convenient to grip, and the propelling movement is powerful, has improved the puncture success rate, and the structural design of two terminal connectors of extension pipe has greatly made things convenient for patient's rescue process, has improved the performance of safe type dialysis with the needle of remaining.

Description

Safety retention needle for dialysis

Technical Field

The utility model relates to a medical article, in particular to a safe indwelling needle for dialysis, which can effectively protect an internal fistula blood vessel and is convenient to hold and puncture, and belongs to the field of medical articles.

Background

In the medical field, the indwelling needle for dialysis has the following disadvantages in daily use:

1. the whole needle tube is short and not easy to fix, and is not easy to operate by one hand after pulling the needle, so that the blood splash is easily caused;

2. the needle handle is not held, the puncture success rate is influenced, and the needle stick injury is easily caused;

3. the integral needle cap is easy to be polluted by the external environment;

4. the heparin cap is free of a separate clamp, bleeding is easy to occur when the heparin cap is opened, gloves are easy to pollute in the operation process, and the infection probability of a patient is increased;

5. the puncture needles are all steel needles, the needle peduncles are short, the friction force with tissues is small, the part entering the blood vessel is short, the slip-out rate is high, the irritation to the blood vessel intima is obvious, intimal hyperplasia can be caused, the blood vessel stenosis is caused, and the complication incidence rate is high.

Although the indwelling needle for dialysis can be indwelling for 72 hours in a human body, the average blood flow of the internal fistula is 500-1000 ml/min, if the indwelling needle for dialysis is brought home in a patient body, once falling occurs, the indwelling needle is very dangerous, and meanwhile, the arteriovenous internal fistula is a life line of a maintenance hemodialysis patient, once the blood vessel of the internal fistula has poor function, the dialysis efficiency is obviously reduced, even the internal fistula cannot be carried out, and the life of the patient is threatened.

How to ensure the use effect of the indwelling needle for dialysis and improve the safety and reliability of the use of the indwelling needle for dialysis becomes a main problem to be solved by the utility model.

Disclosure of Invention

In view of the existing conditions and the defects, the utility model aims to provide the safe indwelling needle for dialysis, which has simple operation process and convenient use, can effectively protect the internal fistula and reduce the damage to the vascular wall, and improves the applicability and the use safety of the indwelling needle for dialysis.

The utility model is realized by the following technical scheme:

the safe indwelling needle for dialysis comprises a trocar, a needle core, a tampon, a needle cap, a soft extension tube and a single-hand clamp. The needle tubing main part of trocar is soft main part, the tampon is at the afterbody of the terminal trocar output channel of needle tubing main part, the main part of nook closing member passes the tampon and nestification is in the needle tubing main part of trocar, nook closing member end and trocar end are equipped with the draw-in groove of holding each other along the direction of puncture, be close to and be equipped with operating handle on the terminal flank of nook closing member, operating handle is outstanding outside the trocar, the needle cap cover is in the needle tubing main part of trocar, extension pipe side direction is connected on the output channel of trocar, extension pipe end is equipped with two connectors, the centre gripping is on the extension pipe to the one hand.

The needle tube body of the trocar is a polyvinyl chloride needle tube body.

The edge of the operating handle close to one side of the trocar is step-shaped.

The surface of the operating handle is provided with evenly distributed bulges.

The safe indwelling needle for dialysis has the advantages that:

1. the soft trocar can effectively protect internal fistula blood vessels, reduce the damage of the traditional steel needles to blood vessel walls, prevent the internal fistula of patients from being more damaged, prolong the service life of the internal fistula, improve the actual blood flow of the patients and improve the dialysis efficiency, and is particularly suitable for patients allergic to the steel needles;

2. the independent needle cap design can effectively prevent the pollution of the trocar and the needle core and reduce the occurrence of infection;

3. the soft trocar cavity is easy to thicken and lengthen, thus being beneficial to achieving blood flow volume for dialysis and preventing the occurrence of the situations such as the falling-off of the puncture needle and the like;

4. the stepped operating handle with the protrusion is convenient to hold and strong in pushing, the pollution to the trocar and the trocar core can be effectively avoided in the operating process, the infection risk is reduced, the puncture success rate is improved, and the needle stick injury of nursing staff is prevented;

5. the soft extension tube is beneficial to fixation, the working stability of the trocar can be effectively enhanced in the using process, the dropping-out situation is prevented, meanwhile, the clamping and the operation of the single-hand clamp are facilitated, and the skin pressure injury caused by the fact that the single-hand clamp is tightly attached to the skin is avoided;

6. the structural design of two connectors at the tail end of the extension tube facilitates connection of an injector and blood return by suction, and whether puncture is successful or not can be judged.

Drawings

FIG. 1 is a schematic view of the safety type indwelling needle for dialysis of the present invention;

FIG. 2 is a partial cross-sectional view of a trocar according to the present invention;

fig. 3 is a schematic structural view of the stylet of the present invention.

Detailed Description

The utility model is described in further detail below with reference to fig. 1, 2 and 3:

the safe indwelling needle for dialysis comprises a trocar 3, a needle core 6, a hemostatic plug 5, a needle cap 1, a soft extension tube 8 and a one-hand clamp 9.

The trocar (3) is made of transparent resin material, and the inside of the trocar (3) is provided with an output channel (4). The needle tube body 2 of the trocar 3 is positioned at the front end of the trocar 3 and is communicated with the output channel 4. In this embodiment, the needle tube body 2 of the trocar 3 is a soft polyvinyl chloride needle tube body, the surface of which is smooth and has certain elasticity and toughness, and the polyvinyl chloride needle tube body has a thicker diameter and a longer length, so that the blood flow is effectively improved, the friction with the inner wall of the blood vessel is reduced, and the dialysis efficiency is improved.

The hemostatic plug 5 is in a piston shape, and is plugged at the tail part of the trocar output channel 4 at the tail end of the needle tube main body 2, and the hemostatic plug 5 can seal the tail part of the output channel 4.

The needle core main body 13 on the needle core 6 is made of steel, the needle core main body 13 penetrates through the hemostatic plug 5 and is embedded in the needle tube main body 2 of the trocar 3, the tail end of the trocar 3 is provided with a clamping groove 15 clamped along the puncture direction, the tail end of the needle core 6 is clamped in the clamping groove 15 through the clamping block, and the needle core 6 is clamped on the tail end of the trocar 3 in a single-direction forward manner. In order to improve the convenience of use and the flexibility of operation, an operating handle 7 is also arranged on the side wing close to the tail end of the needle core 6, and the operating handle 7 protrudes out of the trocar 3. The surface of the operating handle 7 is provided with evenly distributed bulges 12, the edge of the operating handle 7 close to one side of the trocar 3 is provided with a step 11, the step 11 can increase the comfort of holding, reduce the width of the front end of the operating handle 7, increase the operating space and improve the convenience of puncture use.

The needle cap 1 is sleeved on the needle tube main body 2 of the trocar 3, and the independent needle cap 1 can effectively protect the exposed needle tube main body 2 and the needle core main body 13 nested in the needle tube main body 2.

The extension tube 8 is laterally connected to the output channel 4 of the trocar 3, and two connectors 10 are arranged at the tail end of the extension tube 8. In order to avoid contact between the extension tube 8 and the arm of the patient, the length of the extension tube 8 is 10cm or more in this example. The two connectors 10 can be respectively used for connecting a syringe, sucking return blood or carrying out intravenous administration in emergency, and the like, so that the use process is convenient.

The single-hand clamp 9 is clamped on the extension pipe 8, and the extension pipe 8 can be conveniently closed or opened by the single-hand clamp 9.

When the safe indwelling needle for dialysis is used for specific dialysis, the safe indwelling needle for dialysis is taken up, the needle cap 1 is pulled out, the inclined plane of the needle head is adjusted, the operating handle 7 is held by the right hand to extend the trend of the blood vessel for puncture, after blood return occurs, the needle core 6 is withdrawn by the right hand, the trocar 3 is fed by the left hand until the needle tube main body 2 of the trocar 3 is completely fed into the blood vessel, the needle core 6 is completely pulled out, the trocar 3 and the extension tube 8 are fixed after the successful puncture is confirmed, and the puncture process is completed. Wherein, the single-hand clamp 9 can carry out the extension pipe 8 centre gripping or the opening operation of puncture process at any time, has guaranteed that whole puncture process goes on smoothly, in order.

Claims

1. The safe indwelling needle for dialysis is characterized by comprising a trocar, a needle core, a hemostatic plug, a needle cap, a soft extension tube and a single-hand clamp; the needle tube main body of the trocar is a soft main body; the hemostatic plug is plugged at the tail part of a trocar output channel at the tail end of the needle tube main body; the main body of the needle core penetrates through the hemostatic plug and is nested in the needle tube main body of the trocar, the tail end of the needle core and the tail end of the trocar are provided with clamping grooves clamped with each other along the puncture direction, and the side wing close to the tail end of the needle core is provided with an operating handle which protrudes out of the trocar; the needle cap is sleeved on the needle tube body of the trocar; the extension pipe is laterally connected to an output channel of the trocar, and the tail end of the extension pipe is provided with two connectors; the single-hand clamp is clamped on the extension pipe.

2. The safety type indwelling needle for dialysis as claimed in claim 1, wherein the needle tube body of the trocar is a polyvinyl chloride needle tube body.

3. The safety type indwelling needle for dialysis as claimed in claim 1, wherein the edge of the operating handle near the side of the trocar is stepped.

4. The safety type indwelling needle for dialysis as claimed in claim 1 or 3, wherein the surface of the operating handle is provided with evenly distributed protrusions.