Patent ID: 7322359

Claim:
A leak point wetness detector for urological investigations comprising: an instrument body having a passage therethrough to pass a catheter, which catheter is intended for insertion into the bladder through the urethra; a receptacle in said instrument body so arranged and disposed as to receive liquid which leaks from the urethra past the inserted catheter; a temperature sensitive detector sensor mounted to said instrument body where it will be contacted by said leaked liquid, said detector sensor being responsive to the temperature of said liquid and adapted to provide a signal output respective to said temperature; a signal generator to generate and provide a reference output signal simulative of a selected temperature, where the selected temperature is below that of an anticipated temperature of said leaked liquid, and where the output signal of the selected temperature remains constant and is independent of ambient temperature; and a comparator responsive to the difference between said outputs to detect and inform when the signal output sufficiently exceeds said reference output.