Biopsy device for safe puncture

Abstract

The invention discloses a biopsy device for safe puncture. The biopsy device for safe puncture includes a needle core, a needle tube, a handle, a needle tube base, a puncture switch and a safety device body, wherein the safety device body includes a safety component and at least two locking tap positions which are arranged on a puncture column or the puncture switch, and the safety component is movably arranged on the handle, and is provided with at least two stop positions. When the safety component is set at one stop position, the safety component is matched with one locking tap position soas to limit fore-and-aft movement of the puncture switch, and when the safety component is set at the other stop position, limiting cooperation of the safety component and the locking tap position isremoved, so that the puncture switch moves forward. According to the scheme, the relative position of the needle core and the needle tube can be locked after the biopsy device is winded, the needle core and needle tube cannot be moved relative to each other after locking is performed, the needle core is not pushed by mistake, and no accidental puncture occurs, so that the puncture is safer and more precise.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a biopsy device for biopsy sampling, in particular to a safe puncture biopsy device. Background technique [0002] The biopsy device is a medical device, which is suitable for biopsy sampling and absorbing cells of liver, kidney, lung, prostate, breast, thyroid and other organs. It has the characteristics of compact structure and convenient use. [0003] The patent document with the publication number CN103315778 discloses a biopsy device, including: a needle tube, a needle tube holder, a handle, a handle cover, a safety device, a needle core and a firing switch; the handle is provided with a slideway, and a positioning card is provided on the slideway; The needle tube seat is slidably limited on the slideway; the top of the handle is fixed with a spring guide post, and a spring is installed between the spring guide post and the needle tube seat, and the needle core is passed ...

AI Technical Summary

Problems solved by technology

[0005] But at some point, in the process of puncturing, the firing switch is pushed by mistake, and the relative relationship between the needle core and the needle tube changes. The part of the groove exposes the needle tube 2, such as Figure 4 As shown, in this way, part of the non-target tissue will be collected in the sampling groove of the needle core 1 and the damage of the non-target tissue will be increased, and it will cause the doctor to make a wrong judgment, mistakenly thinking that the needle core 1 and the needle tube 2 have been punctured in place; at this time, before the firing Push the firing switch to drive the needle core 1 to puncture into the target puncture tissue 30, but the sampling groove of the needle core 1 will not completely enter the target puncture tissue 30 as expected, if Figure 5 As shown; after firing in this way, the needle tube 2 moves forward, such as Image 6 As shown, the obtained biopsy sample 31 may contain target tissue and non-target tissue, and the positive rate of sampling is reduced

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