3815611 is referenced by 89 patents and cites 7 patents.

The apparatus detects contraction of muscles of living animals, the contraction causing an elastomer body whose impedance changes when flexed, positioned adjacent muscle to flex when the contraction occurs. When a bias voltage is applied to the elastomer body, any change in impedance is readily detectable. The change in impedance may produce a rhythmically repeated elecrical signal, as, for example, when the elastomer body is used to monitor heart activity. This electrical signal can be used for triggering or controlling purposes. For example, this signal can be used to control a pulse generator so that a cardioverting or pacing pulse is generated only after a specified period of time has elapsed since the latest heart activity was sensed by the elastomer body.

Title
Muscle stimulation and/or contraction detection device
Application Number
05/202,238
Publication Number
3815611
Application Date
November 26, 1971
Publication Date
June 11, 1974
Inventor
Denniston III Rollin H
Agent
Rappaport Irving
Sivertson Wayne
Schwartz Lew
Assignee
Medtronic
IPC
A61n 01/36
A61N 01/372
A61N 01/39
A61N 01/05
A61N 01/365
A61N 01/375
A61B 05/11
A61B 05/07
View Original Source