Oximeter with motion detection for alarm modification
US5368026A · kind A · utility
272Cited by
9References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1993 |
| Grant date | Nov 29, 1994 |
| Priority date | — |
| Expiry date | Mar 26, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/7239
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A pulse oximeter which modifies the alarm condition when motion is detected. Basically, if the lack of a pulse is determined to be as a result of motion artifact, the generation of an alarm is postponed. In addition, the display indicates that motion is present and that the last reading is questionable due to the presence of motion. The invention also determines if motion artifact is present from the pulse oximeter detector signal itself. The ratio of the positive and negative peaks of the derivative of the pulse signal are compared to a motion/blood pulse threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.