Photoelectric physiological measuring apparatus
US3980075A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1974 |
| Grant date | Sep 14, 1976 |
| Priority date | — |
| Expiry date | Sep 27, 1994 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/02416
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus is disclosed which comprises a photoelectric probe for introducing light pulses into a measurement area and for producing a measurement signal representative of the light as modulated in the measurement area, such modulation including modulations characteristic of the circulatory system blood volume variations of the area. Demodulation circuitry is disclosed which demodulates the meaningful from the non-meaningful data of the measurement signal, and utilization devices responsive to various characteristics of the meaningful data are disclosed, which utilization devices include a pulse wave meter, pulse amplitude meter, pulse rate meter, and tissue perfusion meter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.