Method and apparatus for measuring blood oxygen levels
US4697593A · kind A · utility
Inventors
Key dates
| Filing date | Feb 26, 1986 |
| Grant date | Oct 6, 1987 |
| Priority date | — |
| Expiry date | Feb 26, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/205
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Apparatus for the in-vivo measurement of blood oxygen levels in a patient, including PA0 an elongate probe adapted to pass into the oesophagus of the patient, PA0 a fibre optic light channel for illuminating the internal surface of the oesophagus PA0 a photosensor for monitoring light reflected from the internal surface of the oesophagus PA0 and a signal processor for determining from the reflected light signal the degree of oxygenation of blood in the internal surface of the oesophagus. A single optical fibre light channel may be utilized both to conduct light into the probe to illuminate the internal surface of the oesophagus, and to conduct light reflected from the internal surface of the oesophagus to the exterior of the patient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.