Impedance measuring pacer
US4337776A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1980 |
| Grant date | Jul 6, 1982 |
| Priority date | — |
| Expiry date | Aug 29, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/3706
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pacer which facilitates the measurements of both electrode impedance and stimulation threshold. When activated by an external magnet, a sequence of reducing-amplitude stimulating pulses is generated, with successive pulses in the sequence being separated by full-amplitude pulses. This pulse alternation scheme allows long test sequences, and therefore measurements with greater resolution, because full-amplitude pacing pulses are always present (even though at a slightly reduced rate). The reduction in amplitude of successive pulses is determined by the electrode impedance rather than being predetermined, and thus the examination of a skin potential recording allows electrode impedance to be determined along with the capture threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.