Anti-backflow structure of lancet and anti-backflow lancet
A technology of anti-reflux and blood collection needles, which is applied in the field of medical devices, can solve the problems of poor anti-reflux effect, poor safety of blood collection tools, and blockage of liquid flow paths, etc., and achieve good stability
Inactive Publication Date: 2019-07-12
上海河隆医疗器械有限公司
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Problems solved by technology
[0004] However, in the actual test, the anti-backflow effect of the above-mentioned structure is poor, and it is almost impossible to block the liquid flow path in time when the blood backflow phenomenon occurs, resulting in poor safety of the blood collection tool. The anti-backflow structure in it is useless and cannot meet expectations technical effect, so it needs to be improved
Method used
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[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.
[0027] See attached Figure 1-7 The blood collection needle shown has an anti-backflow structure inside, and the anti-backflow structure includes a cylindrical body 8 with an internal flow path and an anti-backflow rubber sleeve fixed at one end of the internal flow path of the cylindrical body 8 3. The anti-backflow rubber sleeve 3 is a bottomless straight cylindrical structure, one end of which is sealed and connected with the internal flow path of the cylindrical body 8, and the other end is a free end suspended in the air. One end of the cylindrical body 8 is fixedly provided with a venipuncture needle 1 through the needle handle 2, and the other end is fixedly provided with a rubber stopper puncture needle 6 through the needle holder 5,...
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The invention relates to a blood taking needle anti-backflow structure and an anti-backflow blood taking needle. The blood taking needle comprises a venipuncture needle, a rubber plug puncture needle and the anti-backflow structure. The anti-backflow structure comprises a tubular body with an internal flow path and an anti-backflow rubber sleeve fixed to one end of the internal flow path of the tubular body. The anti-backflow rubber sleeve is of a bottomless straight-tube-shaped structure, one end of the anti-backflow rubber sleeve is connected with the internal flow path of the tubular body in a sealing mode, the other end of the anti-backflow rubber sleeve is a suspended free end, notches are symmetrically formed in the left and right sides of the free end, and the notches define two symmetrical tongue flaps at the free end of the anti-backflow rubber sleeve. By improving an anti-backflow rubber sleeve in the prior art, the anti-backflow rubber sleeve has a good anti-backflow effect and is good in stability, safe and reliable.
Description
technical field [0001] The invention relates to the technical field of medical devices, in particular to a backflow prevention structure for a blood collection needle and a backflow prevention blood collection needle. Background technique [0002] Vacuum blood collection device consists of three parts: vacuum blood collection tube, front puncture needle (including straight needle and scalp type front puncture needle), and needle holder. Vacuum blood collection tubes are preset with a certain amount of negative pressure during the production process. After the current puncture needle enters the blood vessel, blood will automatically flow into the blood collection tube due to the negative pressure in the blood collection tube. Stop blood collection when the pressure in the vacuum blood collection tube is roughly equal to the pressure of the blood vessel. After that, pull out the puncture needle connected to the blood collection needle and the vacuum blood collection tube, and ...
Claims
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IPC IPC(8): A61B5/153A61B5/154
CPCA61B5/15003A61B5/150206A61B5/150221A61B5/153A61B5/154
Inventor 陈剑婷陈剑生
Owner 上海河隆医疗器械有限公司