Adjustable cryoablation needle

Abstract

The invention provides an adjustable cryoablation needle, comprising a shank, a front heat-insulating tube, a rear heat-insulating tube and an intake structure penetrating the shank and the front heat-insulating tube; the shank can move along the axis of the rear heat-insulating tube relative to the rear heat-insulating tube so as to adjust a first axial distance between the front end of the rear heat-insulating tube and the front end of the shank; the front heat-insulating tube can move along the axis of the rear heat-insulating tube relative to the rear heat-insulating tube so as to adjust a second axial distance between the front end of the front heat-insulating tube and the front end of the rear heat-insulating tube. The adjustable cryoablation needle helps prevent the inconveniences caused by surgeons selecting cryoablation needle types, can adapt fully to different entering depths, allows the length of the exposed shank to be as small as possible to prevent bending of the shank and prevent the injury risks, such as tear of human tissues. The adjustable cryoablation needle herein can also further meet conveniently the treatment needs of tumors of different sizes at the premise of satisfying different entering depths.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an adjustable cryoablation needle. Background technique [0002] Existing cryoablation needles are often equipped with two models of short and long needle shaft lengths. The length of the needle shaft determines the depth of the needle tip inserted into the human body. The cryoablation needle with a long needle bar is inserted into the tumor for cryoablation treatment. If the tumor is deep (for example, caused by the patient's obesity) or the shallow side cannot be inserted into the needle and the needle needs to be inserted from the deep side, you can choose the long needle bar Cryoablation needle. [0003] In cryoablation surgery, when the needle bar is inserted into the human body, the safest state is that the needle bar is completely inserted into the human body. When the needle shaft length of the cryoablation needle is long, the needle shaft will be bent due to the gravity ...

AI Technical Summary

Problems solved by technology

[0005] The invention provides an adjustable cryoablation needle to solve the problem that the cryoablation needle with a fixed length of the needle bar cannot meet various treatment needs, and it is easy to form an exposed part of the needle bar during the operation, which will cause the needle bar to bend or cause damage to the human body. Problems that pose a risk of injury

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