Reverse-flowing-prevention venous indwelling needle

A venous indwelling needle and anti-reverse flow technology, applied in the field of medical indwelling needles, can solve the problems of easy cracking, easy to cause skin allergy, single function, etc., and achieve the effect of convenient blood drawing

Active Publication Date: 2014-11-26
丁培琪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above-mentioned various shortcomings of the existing indwelling needles, the purpose of the present invention is to provide a new type of anti-reflux venous indwelling needle, which is used to solve the problems of easy cracking of the outer needle seat of the existing indwelling needles, single function, and easy extension of the tube. Damage, easy to cause skin allergies and other problems

Method used

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  • Reverse-flowing-prevention venous indwelling needle
  • Reverse-flowing-prevention venous indwelling needle
  • Reverse-flowing-prevention venous indwelling needle

Examples

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Effect test

Embodiment 1

[0025] See below first figure 2 The first embodiment of the present invention is described. To simplify the description, figure 2 neutral figure 1 The existing indwelling needles have the same function or structure or use the same markings for the corresponding parts.

[0026] According to the idea of ​​the present invention, figure 2 In the preferred embodiment shown, the isolation assembly 7 is made of silica gel with lower hardness, and further includes three parts of components 71, 72 and 73 (see image 3 enlarged view). More preferably, the components 71, 72 and 73 in this example are all bowl-shaped - having a cavity, and are figure 2 (and image 3 ): the "bowl mouth" (ie, the open end of the cavity) of the component 71 faces the tail of the inner needle 1, and the "bottom of the bowl" (ie, the closed end of the cavity) faces the needle tip of the inner needle; The cavity open end is opposite the cavity open end of assembly 71 ; the cavity open end of assembly...

Embodiment 2

[0031] see below Figure 7 A second embodiment of the present invention is described. Figure 7 In the embodiment shown in FIG. 2 , the isolation assembly 7 is the same as that of the embodiment 1, so it will not be repeated here. Figure 7In the second embodiment, the outer needle seat 4 includes an elastic needle seat 41 and a three-way pipe 42 , and a one-way valve 12 is arranged between the elastic needle seat 41 and the three-way pipe 42 . The one-way valve 12 can only be guided from top to bottom in the figure. In this way, on the one hand, when the inner needle 1 and the outer needle tube 2 enter the vein, the venous blood is prevented from returning to the blood-returning cavity (at the opening of the one-way valve) 14, preventing the flow of blood. Excessive blood return; on the other hand, the operator can observe the venous blood return through the blood return cavity 14 to determine whether the inner needle 1 and the outer needle tube 2 have entered the vein, with...

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Abstract

The invention provides a novel reverse-flowing-prevention venous indwelling needle. The needle comprises an inner needle, an outer needle tube, an extension hose, a water-stopping clamp and an outer needle base. The inner needle is made of hard material and is provided with a blood returning groove, and the tail of the inner needle is connected with a puncturing needle base. One end of the extension hose is connected with a liquid injecting connector assembly, and the water stopping clamp is located outside the extension hose and used for controlling on-off of the extension hose. The first end of the outer needle base comprises a through hole, the second end of the outer needle base is connected with the other end of the extension hose, and the third end of the outer needle base comprises a seal part, and the seal part comprises an isolation combined part. The isolation combined part comprises two or more components. According to the novel reverse-flowing-prevention venous indwelling needle, because an isolation plug made of rubber silicon material is used, the risk of fracturing the outer needle rear base through propping is avoided; after being pulled out, the inner needle can puncture into the vein again through the isolation plug, intravenous dripping is achieved, and besides various operations such as blood drawing and pressure testing are convenient to perform.

Description

technical field [0001] The invention relates to a medical indwelling needle, in particular to an anti-reflux venous indwelling needle. Background technique [0002] Intravenous infusion is widely used in clinical practice, but skin puncture is required for each intravenous infusion. For patients who need long-term infusion, it will not only increase the pain of patients, increase the workload of nurses, but also cause greater infection risk. [0003] In order to solve these problems, indwelling needles are often used clinically for patients who need long-term instillation, critically ill patients, etc., and multiple instillations can be performed after one puncture. The structure of the existing venous indwelling needle or anti-reflux venous indwelling needle is shown in the appendix. figure 1 As shown, it roughly includes an inner needle 1, an outer needle tube 2, a sheath 3, a Y-shaped outer needle seat 4, a puncture needle seat 6, an isolation plug 7, a water stop clip ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/158A61M5/36
Inventor 丁培琪邓智光
Owner 丁培琪
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