CRYOGENIC PROBE FOR TREATING ENLARGED VOLUME OF TISSUE

摘要

A cryoprobe for surgical and other treatments. The cryoprobe comprises an expandable section that performs displacement of a distal cryotip forwards when there is elevation of the operation pressure in the interior of the cry oprobe. Needle-wise metal elements are installed on the external side of the cryotip. These needle-wise elements are deflecting outwards by a deflecting member fastened on the distal edge of an external shaft of the cryoprobe. T his allows a significant enlargement of the frozen volume of the treated tis sue with the same operation temperature and the outer diameter of the cryopr obe. In another embodiment, the needle elements are formed in a displaceable metal sheath and a distal section of a cryotip and/or special protrusions o n this distal section act as the deflecting member.