Anti-reflux structure of blood sampling needle

A blood collection needle and anti-backflow technology, applied in the field of medical devices, can solve problems such as uneven quality, backflow, human injury, etc., and achieve the effects of small changes in production process, reliable work, and good compatibility.

Inactive Publication Date: 2016-07-06
LIUYANG SANLI MEDICAL TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the actual blood collection process, when the negative pressure fails due to the uneven quality of vacuum blood collection tubes, the phenomenon of no negative pressure or positive pressure in individual blood collection tubes, and operational errors, no matter whether the tube type or straight type blood collection needle is used, When collecting blood samples, or when collecting multiple tubes of blood, backflow may occur, that is, the air and blood in the vacuum blood collection tube flow back from the puncture needle, causing serious harm to the human body

Method used

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  • Anti-reflux structure of blood sampling needle

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: see attached figure 1 , reflecting a specific structure of the present invention, the blood collection needle is a straight blood collection needle, and the straight blood collection needle includes a separate blood collection needle 101 and a puncture needle 107, and the puncture needle 107 is covered with a hemostat 106. The blood collection needle 101 and the puncture needle 107 are respectively fixed on the two ends of a needle holder 102, and the inner cavity of the needle holder 102 communicates with the tail end of the blood collection needle 101 and the puncture needle 107; the anti-backflow mechanism is installed in the inner cavity of the needle holder 102; The reverse flow mechanism includes a blocking member 103 and a spring member 105. The blocking member 103 is located between the tail ends of the two needles. The blocking member 103 can reciprocate in the inner cavity of the needle holder 102 along the axial direction of the needle holder 102...

Embodiment 2

[0021] Embodiment 2: see attached figure 2 , reflecting a specific structure of the present invention, the blood collection needle is a straight blood collection needle, and the straight blood collection needle includes a blood collection needle 201 and a puncture needle 207 that are independent, and the puncture needle 207 is covered with a hemostat 206 . The blood collection needle 201 and the puncture needle 207 are respectively fixed on the two ends of a needle holder 202, and the inner cavity of the needle holder 202 communicates with the tail end of the blood collection needle 201 and the puncture needle 207; the anti-backflow mechanism is installed in the inner cavity of the needle holder 202; The reverse flow mechanism includes a blocking member 203 and a spring member 205. The blocking member 203 is located between the tail ends of the two needles. The blocking member 203 can reciprocate in the inner cavity of the needle holder 202 along the axial direction of the nee...

Embodiment 3

[0022] Embodiment 3: see attached image 3 , reflecting a specific structure of the present invention, the blood collection needle is a hose type blood collection needle, and the anti-backflow mechanism is installed in the inner cavity of the needle seat of the puncture needle 302 of the hose type blood collection needle, and the needle seat is divided into connecting The hose section 304 of the transparent hose 307 and the needle section 303 connected to the puncture needle 302 adopt a two-section combined structure. The puncture needle 302 is covered with a hemostat 301 , and the blood collection needle 308 is covered with a protective cover 309 .

[0023] The anti-backflow mechanism includes a blocking member 306 and a spring member 305. The blocking member 306 can reciprocate in the inner cavity of the needle seat along the axial direction of the needle seat. As for the plug, the spring element 305 is located between the blocking element 306 and the puncture needle 302 , ...

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PUM

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Abstract

The invention discloses an anti-reflux structure of a blood sampling needle. The anti-reflux structure is applicable for a hose type blood sampling needle and a straight type blood sampling needle, and comprises a blocking piece and a spring piece, which are arranged inside the inner cavity of a needle file, wherein the blocking piece can reciprocate inside the inner cavity of the needle file in the axial direction and is provided with a corresponding shape or end plug; the spring piece acts on the blocking piece to enable a blood channel of the inner cavity of the needle file to be switched between the closing and opening states. The anti-reflux structure can effectively avoid a sampled blood reflux phenomenon, effectively guards the safety of a human body, and meanwhile is simple in structure, reliable in operation, compatible with the existing blood sampling needle structure, low in change during the production procedure, simple in device structure, small in device number, low in modification cost, and higher in economic feasibility for production of billions of blood sampling needle products.

Description

technical field [0001] The invention relates to a medical device for clinical blood collection, in particular to a blood collection needle for preventing backflow. Background technique [0002] The blood collection needle used for clinical blood collection is used in conjunction with the vacuum blood collection tube for collecting human blood samples. Blood collection needles include connected blood collection needles (needles that puncture blood vessels, also known as venous needles) and puncture needles (that is, needles that puncture the sealing rubber plugs of vacuum blood collection tubes, also known as puncture needles). The medical personnel penetrate the puncture needle into the self-sealing rubber plug of the vacuum blood collection tube, so that the vacuum blood collection tube is connected with the blood collection needle. After the blood collection needle is pierced into the blood vessel of the human body, the blood is drawn into the vacuum blood collection tube...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/153A61B5/154
CPCA61B5/15003A61B5/150206A61B5/150412A61B5/150503A61B5/153A61B5/154
Inventor 陈平轩
Owner LIUYANG SANLI MEDICAL TECH DEV CO LTD
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