CRYOPROBE AND METHOD OF ITS MANUFACTURE Russian patent published in 2021 - IPC A61B18/02 A61B10/02 

FIELD: medical technology.

SUBSTANCE: group of inventions relates to medical technology, namely, a method for manufacturing a cryoprobe (12) with a cooled head (13) for contact with biological tissue and a cryoprobe (12) with a cooled head (13) for contact with biological tissue. The method provides a plastic tubular device (14) containing at least two channels (16, 17). At one tubular end (19), a nozzle (24) is inserted into one of the channels (16). To form the head (13), the tubular end (19) is provided with a bushing (20) having an inner diameter that is greater than or equal to the outer diameter of the tubular device (14), so that the bushing (20) accommodates the tubular end (19) and protrudes distally beyond the tubular end, after which the bushing (20) is deformed radially inward to secure the bushing (20) to the tubular end (19) by means of a press connection, or so that the tubular end (19) having an outer diameter greater than bushing inner diameter (20), axially pressed into bushing (20). In the channel (17), in which the nozzle is absent, during the deformation step, a support pin (42) is placed, inserted into the end of the channel (17). The cryoprobe (12) contains a tubular device (14) having a first channel (16) with a nozzle (24) located at its distal end with a nozzle rod (24a) and at least one second channel (17) located parallel to the first channel (16) at a distance from it and having a cross section greater than the cross section of the nozzle (24) and / or the first channel (16). The cryoprobe (12) includes a bushing (20) located to form a head (13) at the distal tubular end (19) of the tubular device (14) and having an internal lumen that, at least in the fully assembled state, is less than the outer diameter of the tubular device (14), due to which the nozzle (24) is held in the channel (16) as a result of the press fit. The cryoprobe (12) has an end cap (21) located at the distal end of the sleeve (20) so that it covers the bushing.

EFFECT: creation of a cryoprobe with a fluid-tight connection and tensile strength, as well as with an extremely small diameter for penetration into narrow lumens and blood vessels of a patient, cost-effective provision of instruments such as disposable products, simple manufacture with ensuring process reliability.

14 cl, 11 dwg