a venipuncture needle

A venipuncture and needle technology, which is applied in the direction of needles and instruments introduced into the body, can solve the problems that the indwelling needle cannot quickly display blood return, judge whether it has been pierced, and puncture the vein, so as to reduce the risk of accidental injury and increase the success of puncture The effect of high efficiency and convenient processing technology

Active Publication Date: 2022-07-19
BEIJING WANSHENG RENHE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a venipuncture needle. First, it solves the technical problem that the existing indwelling needle cannot quickly display blood return and judge whether it has penetrated into the patient's venous blood vessel; The method of parallel displacement controls the risk of puncturing the vein caused by the retraction of the tip of the needle into the catheter; thirdly, the components that assist in quickly displaying venous blood return and controlling the withdrawal of the needle are all set on the needle handle, so that the human body can hold the finger of the puncture needle It can not only control the rapid display of blood return, judge whether the puncture has entered the patient's vein, but also control the retraction of the tip of the needle into the catheter, so that the catheter and needle can be pushed into the appropriate position of the patient's vein for the second time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] like Figure 1-7 As shown, a venipuncture needle includes a catheter 11, a needle head 12, a needle seat 13, an isolation plug 14, a needle handle 15, and a needle withdrawal assembly 2. The catheter 11 is made of polyurethane material or silicone material, and the overall interior is hollow. The inside is a catheter lumen 111, one end of the catheter lumen 111 is opened as a catheter liquid outlet hole 111a, the other end is opened as a catheter liquid inlet hole 111b, and one end close to the catheter liquid outlet hole 111a is a catheter indwelling portion 112, close to the catheter One end of the liquid inlet hole 111b is a catheter connecting part 113; the needle 12 is made of stainless steel, and the needle 12 is also a hollow tube with a needle lumen 123, a tip part 121, and a needle body part 122. The needle body is The part 122 is accommodated in the catheter lumen 111, and its tip part 121 protrudes out of the catheter liquid outlet hole 111a of the catheter l...

Embodiment 2

[0075] like Figure 8As shown, the manipulation member 22 is a capsule 221 located on the first surface 151 of the needle handle. The capsule 221 is made of silicone material. One method is that the capsule 221 is adhered to the first surface of the needle handle. 151, the two together form a capsule cavity 221a. Another method is that the bag-shaped capsule 221 is bonded on the first surface 151 of the needle handle, and the bag-shaped capsule 221 has a capsule cavity 221a. The inside of the capsule cavity 221a can be preset with a fluid. The fluid is gas or liquid. The capsule cavity 221a is communicated with the needle withdrawal cavity 131b. Press the capsule 221 on the first surface 151 of the needle handle to remove the inside of the capsule cavity 221a. The fluid is filled into the needle withdrawal cavity 131b, and the driving displacement member 21 drives the needle 12 to move from the initial state 31 to the first state 32, that is, the needle 12 is displaced relativ...

Embodiment 3

[0078] like Figure 8 , 10 As shown, in order to ensure the smoothness of the needle withdrawal of the displacement member 21, a piston 211 is connected to the displacement member 21. The piston 211 is made of silica gel material, located inside the needle withdrawal cavity 131b, and is connected with the needle 12. The piston 211 The outer wall is in movable and smooth contact with the inner wall of the needle withdrawal cavity 131b. When the human finger presses the bladder 221 on the first surface 151 of the needle handle to fill the fluid inside the bladder cavity 221a into the needle withdrawal cavity 131b, the piston 211 can be driven to move toward the needle withdrawal chamber 131b. The rear end 133 of the needle seat is displaced in the direction, which drives the needle 12 to move from the initial state 31 to the first state 32 . The gap between the outer wall of the piston 211 and the inner wall of the needle withdrawal chamber 131b is easier to control during the ...

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PUM

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Abstract

The invention provides a venipuncture needle, comprising a catheter, a needle, a needle seat, a needle handle, and a needle withdrawal assembly located on the needle handle. Advancing the catheter into the proper position in the patient's vein increases the success rate of the needle. The needle withdrawal component provided by the venipuncture needle has a simple structure and proper arrangement of functions for use, which not only improves the puncture success rate of the puncture needle, but also effectively protects the medical staff from accidentally stabbing the puncture needle after use.

Description

technical field [0001] The invention relates to a venipuncture needle, in particular to an indwelling needle used for human intravenous infusion and hemodialysis, and belongs to the technical field of medical device manufacturing. Background technique [0002] The venous indwelling needle is a medical device used for intravenous infusion, hemodialysis and other treatments. The existing venous indwelling needle has a flexible catheter and a metal needle set inside the catheter. The tip of the needle is exposed outside the catheter indwelling part. In use, the tip portion of the needle is inserted through the patient's skin into the target vein, allowing part of the catheter indwelling portion and the tip of the needle to enter the target vein, and the catheter and needle continue to enter the vein until the catheter reaches the appropriate position in the vein, and the needle is removed from the catheter. taken out. In some cases, when the medical staff is puncturing the pat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/158
CPCA61M5/158A61M2005/1588
Inventor 董东生周慷李娜
Owner BEIJING WANSHENG RENHE TECH
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