초록

Cryocoolers for use in cryosurgery and other applications comprising dual finned tube helical coil heat exchangers. The size and shape of iceballs created by the probes is controlled by the location of the gas outlets within the cryocooler outer sheath.

대표청구항 ▼

[ We claim:] [1.] A cryocooler comprising:A thermally conductive outer sheath having a closed distal end and a chamber within the sheath, said outer sheath being adapted to be inserted into the body of a human patient;a first coiled heat exchanger comprising a coil of tubing housed within the therma

[ We claim:] [1.] A cryocooler comprising:A thermally conductive outer sheath having a closed distal end and a chamber within the sheath, said outer sheath being adapted to be inserted into the body of a human patient;a first coiled heat exchanger comprising a coil of tubing housed within the thermally conductive outer sheath, and disposed coaxially within the outer sheath, said first coiled heat exchanger having a first gas supply line on its proximal end and a first gas outlet on its distal end, said first gas outlet being in fluid communication with the chamber;a second coiled heat exchanger comprising a coil of tubing housed within the thermally conductive outer sheath, said second coiled heat exchanger being parallel to the first coiled heat exchanger and disposed coaxially within the outer sheath, said second coiled heat exchanger having a second gas supply line on its proximal end and a second gas outlet on its distal end, said second gas outlet being in fluid communication with the chamber.