Coaxial needle with negative pressure adjustable drainage apparatus

Abstract

The coaxial needle comprises a connecting part, the interior of the connecting part is hollow, and the side portion of the connecting part is provided with a communicating part; the sealing cap is detachably arranged at one end of the connecting part, and the sealing cap seals the top of the connecting part; the coaxial needle comprises a coaxial tube and a puncture needle head, the coaxial tube is detachably arranged at the other end of the connecting part, and the puncture needle head penetrates through the sealing cap and the connecting part in sequence and then penetrates out of the bottom of the coaxial tube; the negative pressure ball is connected with the communicating part; the sealing cap, the connecting part, the negative pressure ball and the coaxial tube form a closed space which can be in a negative pressure state; the connecting part with the sealing cap is additionally arranged on the coaxial tube, so that no external air enters a human body through the coaxial tube when the puncture needle head is used or the puncture needle head is replaced by a biopsy gun, liquid during biopsy can be sucked out together through the negative pressure ball for testing, and the processing cost is low.

Description

technical field [0001] The invention relates to a coaxial needle, in particular to a coaxial needle with a negative pressure adjustable flow diverter. Background technique [0002] Biopsy is the abbreviation of "biological tissue examination", also known as surgical pathological examination, which refers to the technique of cutting, clamping or puncturing the diseased tissue from the patient's body for pathological examination in response to the needs of diagnosis and treatment. [0003] At present, many biopsies use a coaxial needle for biopsy, but the coaxial needle is open, so when the puncture needle in the coaxial needle needs to be taken out to replace the biopsy gun during the biopsy, although the coaxial needle can be blocked with a finger, but After all, the hands are too slow, and the gas will still enter the human body, especially when the lung biopsy is performed, if the patient coughs, it will easily cause the patient's discomfort, which may lead to the inabilit...

AI Technical Summary

Problems solved by technology

[0003] At present, many biopsies use a coaxial needle for biopsy, but the coaxial needle is open, so when the puncture needle in the coaxial needle needs to be taken out to replace the biopsy gun during the biopsy, although the coaxial needle can be blocked with a finger, but After all, the hands are too slow, and the gas will still enter the human body, especially when the lung biopsy is performed, if the patient coughs, it will easily cause the patient's discomfort, which may lead to the inability to perform a good biopsy and bring problems to the actual use. many inconveniences

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