Home-based system and method for monitoring sleep state and assessing cardiorespiratory risk
US5902250A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 31, 1997 |
| Grant date | May 11, 1999 |
| Priority date | — |
| Expiry date | Mar 31, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/6821
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for determining the sleep state of a patient includes monitoring heart rate variability of the patient and determining sleep state based on the heart rate variability. The method also may include monitoring the frequency of eyelid movements and making the sleep state determination based also on the frequency of eyelid movements. A method for determining respiratory pattern includes monitoring heart rate variability by receiving heart beat signals and determining respiratory pattern from the strength of the signals. A home-based, wearable, self-contained system determines sleep-state and respiratory pattern, and assesses cardiorespiratory risk, of a patient based on the frequency of eyelid movements, the frequency of head movements, and heart rate variability of the patient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.