Adjustable cryoablation needle

Abstract

The invention provides an adjustable cryoablation needle. The adjustable cryoablation needle comprises a needle rod, a front-section heat insulation pipe and a rear-section heat insulation pipe; the needle rod can move in the axial direction of the rear-section heat insulation pipe relative to the rear-section heat insulation pipe so as to adjust the axial distance between the front end of the rear-section heat insulation pipe and the front end of the needle rod. The front-section heat insulation tube can synchronously move relative to the rear-section heat insulation pipe along the axial direction of the rear-section heat insulation pipe along with the needle rod, so that the length of a targeting region of the adjustable cryoablation needle is kept unchanged. The cryoablation needle canavoid the inconvenience caused by the fact that a doctor selects the type of cryoablation needles, and can fully adapt to different needle inserting depths, so that the exposed needle rod part can beas short as possible, and the needle rod bending and damage dangers of tearing to human tissues are avoided.

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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