Lead current measurement circuit
US5137021A · kind A · utility
107Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1990 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Nov 29, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3706
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus for and method of measuring the current which flows through a cardiac pacing lead to artificially stimulate contractions of the myocardium. This current measurement is useful for estimating battery life and monitoring proper operation of the pacing lead and the implantable pulse generator. The measurement is accomplished by carefully controlling the gain of the output amplifier and timing the rate of charge and discharge of the output capacitor. The average pacing current can be determined from the relative charge and discharge times given that the other circuit component values are known and controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.