Biopsy needle and biopsy device with same

Abstract

The invention discloses a biopsy needle and a biopsy device comprising the biopsy needle and a driving device. The biopsy needle is used for being connected with a driving device and can be driven by the driving device to be switched to a differential rotating state or a constant-speed rotating state. The biopsy needle comprises an outer knife tube and an inner knife tube arranged in the outer knife tube in a sliding mode. In a differential rotation state, the inner knife tube rotates and translates relative to the outer knife tube. In the constant-speed rotating state, the inner knife tube only rotates relative to the outer knife tube. The driving device of the biopsy device can move to different positions to output power to the biopsy needle, and gear shifting operation is achieved, so that the biopsy needle is switched to different working states according to needs. In a differential rotation state, living tissues can be cut; In the constant-speed rotating state, the inner knife tube only rotates relative to the outer knife tube, a medicine can be injected through the inner knife tube and evenly diffused to the whole incision of living tissue, pain of a patient is relieved in time, hematoma can be circumferentially sucked and removed through the inner knife tube, and the inner knife tube cannot be blocked.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a biopsy needle and a biopsy device with the biopsy needle. Background technique [0002] A biopsy needle is a medical device used to take a sample of living tissue inside an organ such as the breast. Existing biopsy needles usually include an outer knife tube with a cutting window, and an inner knife tube slidingly arranged in the outer knife tube. During operation, the inner knife tube translates and rotates in the outer knife tube so as to cut living tissue at the cutting window. [0003] During the actual operation, it is often necessary to adjust the direction of the biopsy sampling slot; inject drugs, such as anesthetic drugs, to the incision of the living tissue through the inner knife tube to reduce or relieve the pain of the patient; remove the hematoma through the inner knife tube. However, the inventors of the present application found that: when using the existing...

AI Technical Summary

Problems solved by technology

However, the inventors of the present application found that: when using the existing biopsy needle to deliver the drug, it is necessary to stop the movement of the inner knife tube and then deliver the drug through the inner knife tube, while the inner knife tube stopped moving and also stopped rotating, resulting in the inability of the medicine Evenly injected into the incision of the living tissue, but only local pain relief, the pain relief effect is not good, and the hematoma is easy to block the inner knife tube, and the removal effect is not good

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