Biomedical method and apparatus for controlling the administrati

Details Biomedical method and apparatus for controlling the administrati Biomedical method and apparatus for controlling the administrati

1982-03-29

1987-08-18

Kamm, William E.

Surgery

Truss

Pad

A61N 136

Patent

active

046869875

ABSTRACT:
A biomedical apparatus capable of sensing changes in the heart's ventricular volume or stroke volume and then changing the operating performance of the device in a fashion as a function of stroke volume. A relatively low frequency signal (under 5 KHz) is applied between spaced electrodes disposed in the heart and the beating action of the heart serves to modulate this signal due to changes in impedance being sensed between these or other electrodes within the heart. The modulated carrier signal is then processed to remove R-wave and other electrical artifacts and then demodulated to remove the carrier frequency component leaving the envelope which is proportional to instantaneous ventricular volume. This envelope signal then contains stroke volume and ventricular volume information which can be used by the biomedical apparatus to vary its operating parameters. For example, a current proportional to changes in stroke volume may be injected into the timing circuit of a demand-type cardiac pacer pulse generator whereby the interpulse interval of the pulse generator is varied as a function of stroke volume.

REFERENCES:
patent: 3316896 (1967-05-01), Thomasset
patent: 3587562 (1971-06-01), Williams
patent: 3742936 (1973-07-01), Blanie et al.
patent: 4137910 (1979-02-01), Murphy
patent: 4303075 (1981-12-01), Heilman et al.
patent: 4313442 (1982-02-01), Knudson et al.

Affiliated with

Also associated with

Rating

Biomedical method and apparatus for controlling the administrati does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Biomedical method and apparatus for controlling the administrati, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Biomedical method and apparatus for controlling the administrati will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1111564