Medical puncture biopsy device

Abstract

The invention relates to the technical field of medical instruments, specifically to a medical puncture biopsy device. The medical puncture biopsy device comprises an outer tube, an inner tube and a puncture needle, wherein the inner tube is inserted into the outer tube; a negative-pressure channel is formed between the tail parts of the inner tube and the outer tube; a negative pressure opening communicating with the negative pressure channel is arranged on the outer wall of the outer tube; the puncture needle is provided with a puncture end and a connector located at one end away from the puncture end; the connector is in threaded connection with the inner wall of the inner tube; the inner tube and the outer tube are respectively provided with a biological gel inlet; the inner tube can move to a first position and a second position in the axial direction of the outer tube; when the inner tube is located at the first position, the tail end of the inner tube and the puncture end of thepuncture needle are both located in the outer tube, and a gap is formed between the tail ends of the inner tube and the outer tube in an axial direction; and when the inner tube is located at the second position, the end surfaces of the tail ends of the outer tube and the inner tube are flush, and a first biogel inlet communicates with a second biogel inlet, and the puncture needle extends out ofthe tail end opening of the outer tube. According to the invention, tumor cells can be prevented from leaking out of a puncture part in puncture biopsy.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a medical puncture biopsy device. Background technique [0002] A needle biopsy is a way of pathological examination of suspected cancerous tissue. In recent years, the needle biopsy of renal tumors has been added to the surgical operation of renal cells, and a more accurate pathology of renal tumors can be obtained through needle biopsy. However, clinically, if the malignant proportion of the renal tumor is not known, if a needle biopsy is used directly, when the malignant proportion of the renal tumor is high, the preoperative needle biopsy has a higher probability of invading the tumor, and once the tumor ruptures, There is a risk of tumor spreading locally or even distant metastasis. [0003] In order to avoid the risks brought by the above-mentioned needle biopsy, such as figure 1 As shown, the patent No. CN102258389B discloses a medical puncture biopsy device...

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Problems solved by technology

[0004] The above-mentioned technical solutions have at least the following defects: after the puncture needle is pulled out from the tumor tissue, the puncture site will bleed, and the blood containing tumor cells will spread to the area defined by the inner tube 2. 2 is injected with biogel, and the biogel covers the outflowing blood. However, since the outflowing blood and the biogel cover the same area, that is, the area limited by the inner tube 2, when the puncture sheath After being pulled out from the human body, the blood at the border covered by the biogel still has the possibility of spreading to the surrounding area, causing the tumor cells in the blood to overflow. It brings great risks to patients, so it is urgent to solve this situation

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