ADJUSTABLE CRYOABLATION NEEDLE

Disclosed is an adjustable cryoablation needle, comprising a needle rod (3), a front-segment heat-insulated tube (1), a rear-segment heat-insulated tube (2), and an gas inlet structure (7) penetrating the needle rod (3) and the front-segment heat-insulated tube (1), wherein the needle rod (3) can move relative to the rear-segment heat-insulated tube (2) in the axial direction of the rear-segment heat-insulated tube (2) so as to adjust a first axial distance between the front end of the rear-segment heat-insulated tube (2) and the front end of the needle rod (3); and the front-segment heat-insulated tube (1) can move relative to the rear-segment heat-insulated tube (2) in the axial direction of the rear-segment heat-insulated tube (2) so as to adjust a second axial distance between the front end of the front-segment heat-insulated tube (1) and the front end of the rear-segment heat-insulated tube (2). The adjustable cryoablation needle can prevent the inconvenience caused by a doctor selecting the model of the cryoablation needle, can also be fully adapted to different needle insertion depths to make the length of the exposed portion of the needle rod (3) as short as possible so as to prevent the bending of the needle rod (3) and prevent the risk of damage, such as tearing, to human tissues, and can further meet treatment requirements for tumors of different sizes while also meeting different needle insertion depths.