Splash-proof double-channel sampling needle head of blood collection tube
A dual-channel, needle technology, applied in the field of medical equipment, can solve the problem that the air pressure inside and outside the blood collection tube cannot be truly balanced, so as to achieve the effects of convenient operation, improved work efficiency and no danger
Inactive Publication Date: 2012-12-05
宁波市鄞州青林医疗器械技术咨询有限公司
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Problems solved by technology
The reason is that butyl rubber is the best material for making test tube stoppers, and it has good elasticity and airtightness. Even small gaps on the needle will be elastically sealed by butyl rubber. Therefore, the above technology The scheme can not really play a role in balancing the air pressure inside and outside the blood collection tube
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[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0015] The splash-proof double-channel sampling needle of the blood collection tube is composed of a needle seat 1, an air inlet 2, a blood drawing channel 3, an air inlet 4, an air outlet 5, an inner tube 6 and an outer tube 7. Wherein, the outer tube 7 and the inner tube 6 are round tubes made of stainless steel, the outer diameter of the inner tube 6 is smaller than the inner diameter of the outer tube 7, the inner tube 6 is inside the outer tube 7, and the 0.9 arc range of the outer wall of the inner tube 6 is in the same range as The 1.2 radian range of the inner wall of the outer tube 7 is a whole. The lower end of the combined body of the outer tube 7 and the inner tube 6 has a uniform slope.
[0016] The air intake channel 4 is a crescent-shaped space formed by the outer wall of the inner tube 6 and the inner wall of the outer tube 7 , and the ...
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The invention relates to the technical field of medical apparatus and instruments, in particular to a splash-proof double-channel sampling needle head of a blood collection tube. The splash-proof double-channel sampling needle head is composed of a needle holder, an air inlet hole, a blood drawing channel, an air inlet channel, an air outlet hole, an internal tube and an external tube, wherein the external tube and the internal tube are circular tubes made of stainless steel, and the internal tube is positioned in the external tube. The air inlet channel is a space formed by the external wall of the internal tube and the internal wall of the external pipe and in a crescent plane, and an internal space of the internal tube serves as the blood drawing channel. An upper port and a lower port of the air inlet channel are closed; and the air inlet hole and the air outlet hole are formed on the sidewall of the air inlet channel. According to the splash-proof double-channel sampling needle head, the blood drawing channel and the air inlet channel are integrally arranged, so that a blood sample in a vacuum blood collection tube can be directly drawn without removing a rubber piston, and as a result, the working efficiency is improved, and the operation of analyzing the blood sample is safer and more reliable.
Description
technical field [0001] The invention relates to the technical field of medical instruments, in particular to a splash-proof dual-channel sampling needle for a blood collection tube. Background technique [0002] The existing process of taking out the blood sample in the vacuum blood collection tube is to pull out the plastic splash cap and the rubber stopper of the vacuum blood collection tube from the test tube mouth, and then extend the injection needle into the liquid from the mouth of the tube to extract. Because there is a certain negative pressure in the blood collection tube, the moment the rubber stopper is pulled out of the test tube, the outside gas rushes into the tube, which will cause the blood in the tube to splash outward. Although the existing vacuum blood collection tube is equipped with an anti-splash cap on the outside of its rubber stopper, this cannot completely prevent the blood from contacting the operator, because if the blood splashes a large amount,...
Claims
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Inventor 许小玲
Owner 宁波市鄞州青林医疗器械技术咨询有限公司