Abstract:
Electrical safety and more explicityly, patient shock hazard associated with the
use of biomedical electronic equipments has become controversial and
embrassing subject and become a continuously growing problem.
Great majority of electric accidends involve a current pathway through the
victime from one upper limb to the feet or to the opposite upper limb. So various
effects of the electric current on the muscles along its pathway,as well as its
effectcs on the heart as it passes through the chest.So ECG must not produce a
direct electrical connection between the subject and ground. Electrical isolation
is provided using transformer isolation , capacitive isolation, or optical isolation
coupling techniques.
in this work, ECG signal was transmitted via an optical amplitude modulated
transmitter and the signal decoded at the receiver,to achieve patient’s safety
against electrical hazards (Micros hock and leakage current), using diode laser
at the end of the patient’s circuit and photodetector at the portion of the circuit
connected to the ac power line and ground.
