What is the maximum electrical leakage allowable?

• A. 50 uamps
• B. 200 uamps
• C. 100 uamps
• D. 500 uamps

Answer: (C)

Keeping stray electrical currents away from the patient is essential for safety, so approved medical equipment limits how much leakage current can flow from the device. In normal operation, the safe ceiling for patient leakage current is 100 microamps. This value strikes a balance between allowing complex perfusion systems to function reliably and protecting the patient from electric shock. Values lower than this would be unnecessarily restrictive, while higher values would exceed safety guidelines and increase risk. (There are higher limits only under certain fault conditions, but the question targets normal operation, making 100 microamps the correct maximum.)