Adjustable cryoablation needle

Abstract

The present invention provides an adjustable cryoablation needle, comprising: a needle bar, a front section of heat insulating tube, a rear section of heat insulating tube, and an air intake structure passing through the needle bar and the front section of the heat insulating tube; the needle bar can be relatively The rear thermal insulation tube is moved along the axial direction of the rear thermal insulation tube to adjust the axial first distance between the front end of the rear thermal insulation tube and the front end of the needle bar; the front thermal insulation tube can be moved relative to the The rear heat insulation tube moves along the axial direction of the rear heat insulation tube to adjust the second axial distance between the front end of the front heat insulation tube and the front end of the rear heat insulation tube; the present invention can prevent doctors from choosing the type of cryoablation needle And bring the same, also can fully adapt to different depths of needle insertion, so that the length of the exposed needle shaft part is as short as possible, avoiding the bending of the needle shaft, and the risk of damage to human tissues such as tearing. The present invention can further facilitate meeting the treatment requirements of tumors of different sizes while satisfying different needle insertion 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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