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Puncturing blood return structure of sleeve needle

A trocar and cannula technology, applied in trocars, puncture needles, puncture needles, etc., can solve the problems of easy breakage, sudden change in the strength of trocar puncture needles, etc., and achieve low cost, higher cost, unique novelty and The effect of practicality

Inactive Publication Date: 2016-07-20
张亚根
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical solution proposed by the present invention appears in a simpler form, which can not only solve the problem that the cannula puncture needle is easily broken due to a sudden change in strength along the axis of the puncture needle, but also has the characteristics of satisfying the passage of blood, and the production and processing are simpler and cost-effective. The lower characteristic, its unique novelty and practicability constitute a new technical solution in the field of puncture needles

Method used

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  • Puncturing blood return structure of sleeve needle

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Embodiment Construction

[0014] figure 1 It is a schematic cross-sectional view of the structure of the invention, from which it can be seen that the present invention is composed of a puncture needle 1 and a sleeve 2, and the sleeve 2 is placed outside the puncture needle 1; Composed of steel wire, one end of the puncture needle 1 is in the shape of a triangular needle point, and the tip of the needle point is located on the axis of the solid steel wire 1; at least one blood hole 2A is provided on the outer wall of the front end of the sleeve 2, and the sum of the cross-sectional areas of the blood hole 2A It satisfies the requirement of blood backflow during puncture, and makes the inner and outer spaces of the cannula 2 communicate at the blood hole 2A.

[0015] When the puncture needle 1 and the cannula 2 in the trocar puncture blood return structure of the present invention puncture and enter the blood vessel, the blood can flow between the cannula 2 and the puncture needle 1 through the blood ho...

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Abstract

The invention relates to a puncturing blood return structure of a sleeve needle. The puncturing blood return structure consists of a puncturing needle and a sleeve, wherein the sleeve is arranged at the outer surface of the puncturing needle. The puncturing blood return structure is characterized in that the puncturing needle consists of a straight solid-core steel wire; the cross section of the solid-core steel wire is in a circle shape, and is provided with longitudinal uniform strength; the tip part of the solid-core steel wire is in a triangular needle tip shape, and the needle tip is positioned on an axis of the solid-core steel wire; a blood hole is formed in the side wall of the front end of the sleeve. The puncturing blood return structure has the advantage that when the puncturing blood return structure completes puncturing and enters a blood vessel, the blood enters a space between the puncturing needle and the sleeve through the blood hole of the sleeve, and is observed.

Description

Technical field: [0001] The invention relates to a basic component used in medical equipment, in particular to a puncture blood return structure of a trocar used in venipuncture. Background technique: [0002] Modern medicine has an inseparable relationship with venipuncture. In clinical practice, it is often necessary to establish an infusion channel by means of puncture to complete the purpose of diagnosis and treatment, but a puncture needle must be used; with the advancement of science and technology and the needs of treatment, a large number of trocar puncture needles are used in clinical diagnosis and treatment. [0003] At present, trocar puncture needles are mostly hollow steel pipe needles. Due to the composition characteristics of the trocar, the diameter of the cannula puncture needle is smaller than the indwelling cannula on its periphery. At the same time, in order to observe the blood return when the puncture needle enters the vein, a side hole must be added b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/34
CPCA61B17/34A61B17/3417A61B17/3421A61B2017/3454
Inventor 张亚根张亚平
Owner 张亚根
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