Cryogenic capsule probes

Claim 1

A CAPSULE PROBE FOR INSERTION INTO A HUMAN OR ANIMAL BODY COMPRISING AN ELONGATED HOLLOW CASING OF SUBSTANTIALLY RIGID MATERIAL AND HAVING A BLUNT ROUNDED FORWARD END AND A ROUNDED REAR END, FLEXIBLE INSULATED CRYOGENIC FLUID CONDUIT MEANS EXTENDING INTO THE REAR END OF SAID HOLLOW CASING AND COMPRISING TUBING FOR LEADING CRYOGENIC FLUID INTO THE CASING AND TUBING FOR EXHAUSTING CRYOGENIC FLUID FROM THE CASING, SAID CONDUIT MEANS BEING SUBSTANTIALLY LESS IN CROSS-SECTIONAL SIZE THAN SAID CASING AND BEING SUBSTANTIALLY UNIFORM IN DIAMETER ALONG ITS ENTIRE LENGTH, AND CRYOGENIC FLUID DISTRIBUTION MEANS WITHIN SAID HOLLOW CASING AND COMPRISING COOLING COIL MEANS CONNECTED TO SAID CRYOGENIC FLUID TUBING AND EXTENDING ALONG AT LEAST A PORTION OF THE LENGTH OF SAID HOLLOW CASING AND ADJOINING SAID WALL OF SAID CASING AND DIRECTING A FLOW OF CRYOGENIC FLUID ALONG SAID LENGTH OF THE INSIDE SURFACE OF THE WALL OF THE CASING FOR PRODUCING UNIFORM COOLING OF THE SAID PORTION OF THE LENGTH OF THE WALL.