04155852 is referenced by 49 patents and cites 7 patents.

A medical instrument, specifically shown as a dialysis machine, incorporates an electrically isolated and hermetically sealed high thermal flux heater in conjunction with means for vectorially cancelling alternating current signal components generated in the operation of the machine. Because of electrical coupling between the medical instrument and a human patient blood stream, large ground leakage currents can result in electrical shock for a patient if the ground wire of the machine becomes open circuited. However, the combination of a specially modified dialysate fluid heater with an extremely large and dependable isolation resistance and operating mode dependent vectorial compensation for resistive and capacitive leakage current permits total leakage current from chassis to ground to be brought below a hitherto unattainable 1 microamp level.

Title
Low leakage current medical instrument
Application Number
5/743223
Publication Number
4155852
Application Date
November 19, 1976
Publication Date
May 22, 1979
Inventor
Robert L Anderson
Boulder
CO, US
Halbert Fischel
14802 Newport Ave., Apt. 2D, Tustin, 92680
CA, US
Agent
Fraser and Bogucki
Assignee
Halbert Fischel
CA, US
IPC
B01D 31/00
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