Sampling needle and detection device

Abstract

The invention discloses a sampling needle and a sample detection device. The sampling needle comprises: a needle head part; a needle body part, which is connected to the needle head part, is hollow, internally equipped with a sampling channel hole, and is equipped with a sampling hole communicated with the sampling channel hole on a side wall of the needle body part; wherein the distance from thevertex of a blind end of the sampling hole to the axis of the sampling channel hole is smaller than the radius of the section of the sampling channel hole. In this way, the inner wall of the samplingneedle can be thoroughly cleaned conveniently, and the reliability of a detection result can be improved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a sampling needle and a detection device. Background technique [0002] Sampling needles are widely used in medical devices such as testing devices, especially blood analysis devices. During use, the sampling needle piercing the sample tube needs to suck the sample to be tested in the sample tube through the sampling hole provided on the side wall of the sampling needle and the sample channel communicated with the sampling hole. [0003] In the prior art, the drilling accuracy of the sampling hole is high. Once the transition is drilled, a pit will be formed on the inner wall of the sampling needle. When the liquid is input through the sample channel to clean the inner wall of the sampling needle, the cleaning liquid cannot reach the pit. , forming a cleaning dead angle, affecting the accuracy of the test results. [0004] In the long-term research and development proce...

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Problems solved by technology

[0003] In the prior art, the drilling accuracy of the sampling hole is high. Once the transition is drilled, a pit will be formed on the inner wall of the sampling needle. When the liquid is input through the sample channel to clean the inner wall of the sampling needle, the cleaning liquid cannot reach the pit. , forming a cleaning dead angle, affecting the accuracy of the test results

[0004] In the long-term research and development process, the inventor of the present application found that the inner wall of the existing sampling needle is prone to residual samples, which cannot be cleaned thoroughly, and the reliability of the detection results is poor.

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