Which fetal monitoring?
-Wire electrode penetrates fetal scalp
ruptured amniotic membranes
-Vaginal body fluids create a saline electrical bridge that completes the circuit & permits measurement of the voltage differences b/w 2 poles
-2 wires of the bipolar electrode attached to a reference electrode on the maternal thigh to eliminate electrical interference
-Electrical fetal cardiac signal (P wave, QRS complex, T wave) is amplified & fed into a cardiotachometer for fetal heart rate calculation
Internal electronic monitoring