Adjustable cryoablation needle

Abstract

The invention provides an adjustable cryoablation needle, which comprises a needle bar, a front section heat insulating tube, and a rear section heat insulating tube.The needle barcan move relative tothe rear section heat insulating tube in the axial direction of the rear section insulating tube so as toadjust an axial direction first distance between the front end of the rear section insulatingtube and the front end of the needle bar; and the front section insulating tube can move relative to the rear section insulating tube in the axial direction of the rear section insulating tube so as to adjust an axial direction second distance between the front end of the front section insulating tube and the front end of the rear section insulation tube.According to the adjustable cryoablation needle,inconvenience brought by a doctor to select the type of the cryoablation needle can be avoided, theadjustable cryoablation needle can also fully adapt to different needle inserting depths, so that the length of the exposed needle barpartis as short as possible to avoid bending of the needle bar and damages such as tearing of human tissues. According to the adjustable cryoablation needle, thetreatment needs of different sizes of tumorscan be further met while the different needle depths are met.

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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