PREVENTION OF SAFETY HAZARDS DUE TO LEAKAGE CURRENT
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United States of America Patent
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N/A
Issued Date -
Aug 2, 2012
app pub date -
Feb 1, 2011
filing date -
Feb 1, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Medical apparatus includes an electrical power supply, which is configured for connection to an electrical medical device that is coupled to a body of a patient. In one embodiment, the apparatus includes alternating current (AC) lines that include a ground line. A switch is coupled to connect and disconnect the AC lines from an AC power source. A current sensor is coupled to sense a current flowing in the ground line and to actuate the switch to disconnect the AC lines when the current exceeds a predetermined threshold. In another embodiment, a plurality of electrocardiogram (ECG) leads, including a common lead, are coupled to the body of the patient. An auxiliary current sensor is coupled to monitor a current flowing through the common lead and to actuate the switch to disconnect the power connection when the current exceeds a predetermined limit.
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