Method and apparatus for indicating repetition intervals of a sp

Details Method and apparatus for indicating repetition intervals of a sp Method and apparatus for indicating repetition intervals of a sp

1988-05-23

1990-08-07

Jaworski, Francis

Surgery

Truss

Pad

128698, 128706, 128710, A61B 504

Patent

active

049459171

ABSTRACT:
The method and apparatus particularly are applicable for displaying the fetal R-wave with respect to the maternal R-wave, and comprise the steps of generating a first electrical signal corresponding to the second derivative of the composite signal (maternal R-wave); generating a second electrical signal corresponding to the second derivative of the composite signal after the specified component has been removed; subtracting the second electrical signal from the first electrical signal to produce a third electrical signal; and utilizing the third electrical signal for indicating the repetition intervals (fetal R-waves) of the specified component.

REFERENCES:
patent: 3594555 (1968-09-01), Klein et al.
patent: 4393877 (1983-07-01), Imran et al.
patent: 4537200 (1985-08-01), Widrow
patent: 4704681 (1987-11-01), Shimizu et al.
patent: 4781200 (1988-11-01), Baker

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