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Dripping-proof backflow-blood-observable venous blood taking needle

An anti-drip and blood collection needle technology, applied in medical science, sensors, diagnostic recording/measurement, etc., can solve problems such as consumption, insufficient blood collection volume, and affecting the accuracy of test results, so as to improve accuracy and prevent cross-contamination

Active Publication Date: 2011-08-24
成都普什医药塑料包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, because the cavity of the blood return chamber consumes part of the vacuum in the vacuum blood collection tube, the blood collection volume of the first vacuum blood collection tube will be obviously insufficient, and the insufficient blood collection volume may affect the accuracy of some test results

Method used

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  • Dripping-proof backflow-blood-observable venous blood taking needle

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Experimental program
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Effect test

Embodiment 1

[0034] According to the concrete structural diagram of the venous blood collection needle designed by the present invention, see Figure 1-Figure 6 . Use a vacuum blood collection tube and a needle holder to simulate the collection of human blood. The human venous pressure (when using a cuff) is simulated at 4KPa. The schematic diagram of the blood collection process is shown in Figure 9 , Figure 10 with Figure 11 . The result of the simulation is that the return of blood can be observed, the influence of the blood sample collection volume is small, and there is no dripping of blood when the blood is collected.

Embodiment 2

[0036] According to the concrete structural diagram of the venous blood collection needle designed by the present invention, see Figure 8 . Use a vacuum blood collection tube and a needle holder to simulate the collection of human blood. The simulated setting of human venous pressure (when using a cuff) is 4KPa, and the schematic diagram of the blood collection process is shown in Figure 12. As a result of the simulation, blood return can be observed, and the influence of blood sample collection volume is small, and at the same time, blood dripping can be prevented when the blood is collected.

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Abstract

The invention relates to a dripping-proof backflow-blood-observable venous blood taking needle, which can improve the accuracy of blood taking amount, prevent dripping after blood taking, conveniently observe backflow blood and effectively prevent cross contamination caused by blood dripping, and ensure accurate blood taking amount. The blood taking needle consists of far-end component and a near-end component which are fixedly connected, wherein the far-end component comprises a far-end needle seat with a far-end needle seat cavity and a far-end needle tube fixed on the far-end needle seat, and the upper end of the far-end needle tube is communicated with the far-end needle seat cavity; the near-end component comprises a near-end needle seat with a near-end needle seat cavity and a near-end needle tube fixed on the near-end needle seat; a wet-closing member is arranged between the far-end needle seat cavity and the near-end needle seat cavity and separate the far-end needle seat cavity from the near-end needle seat cavity, and the lower end of the near-end needle tube passes through the wet-closing member and extends into the far-end needle seat cavity; and the far-end needle seat and the near-end needle seat are made of transparent or semitransparent material.

Description

technical field [0001] The invention relates to a venous blood collection needle with the function of visible blood return, in particular to a venous blood collection needle capable of improving the accuracy of blood collection volume and having the function of preventing blood dripping after blood collection. Background technique [0002] The venous blood collection needle is generally used in conjunction with a vacuum blood collection tube with negative pressure and a needle holder for collecting human venous blood. U.S. Patent No. 5,303,713 provides a structure of a venous blood collection needle, which consists of a needle tube, a needle seat and a protective cover. A stainless steel needle tube with needle points at both ends passes through the needle seat to form the distal end and proximal end of the needle tube respectively. The distal end is used to puncture the vein, and the proximal end is used to puncture the rubber plug of the vacuum blood collection tube. Under...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/154
Inventor 王德永蓝云锋潘建军
Owner 成都普什医药塑料包装有限公司
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