Bipolar electrodes for fetal heart-rate recording during labor

Details Bipolar electrodes for fetal heart-rate recording during labor Bipolar electrodes for fetal heart-rate recording during labor

1979-06-19

1981-11-10

Cohen, Lee S.

Surgery

Truss

Pad

128643, A61B 504

Patent

active

042992320

ABSTRACT:
A bipolar electrode for fetal heart-rate recording comprises a flexible cup having a base portion and a substantially frusto-conical portion secured to and flaring outwardly from the base portion and defining a rim of the cup. The electrode further comprises a first electrode pole which is pointed and is of rod form and extends into the interior of the cup from the base portion. A second electrode pole is exposed to the exterior of the cup. The cup is applied to the fetal scalp and upon pressing the rim of the cup into contact with the fetal scalp the point of the first electrode pole pierces the fetal skin and the cup becomes adhered by suction to the fetal scalp while the second electrode pole makes electrical contact with maternal liquid.

REFERENCES:
patent: 2660175 (1953-11-01), Thrasher et al.
patent: 3505993 (1970-04-01), Lewes et al.
patent: 3534733 (1970-10-01), Phipps et al.
patent: 4157710 (1979-06-01), Abitol
Rosen et al., "The Human Fetal Electroencephalogram", Am. J. Ob. & Gyn., vol. 104, pp. 1057-1060, 1969.

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