发明名称 |
PHOTOPLETHYSMOGRAPH SIGNAL-TO-NOISE ENHANCEMENT |
摘要 |
A ring plethysmograph having a pressure adjustment for locally pressurizing one side of a finger thereby biasing the pressure on an artery wall so that the plethysmograph is optimally sensitive without interfering with blood flow. An auxiliary photodetector possibly with a second light source, is disposed on the low-pressure side of the finger for two purposes: providing a noise reference for canceling noise on the plethysmograph signal, and also for providing a separate motion signal for monitoring the activity level of a patient.
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申请公布号 |
WO03103486(A1) |
申请公布日期 |
2003.12.18 |
申请号 |
WO2003US17024 |
申请日期 |
2003.05.30 |
申请人 |
MASSACHUSETTS INSTITUTE OF TECHNOLOGY |
发明人 |
ASADA, HARUHIKO, H.;HUTCHINSON, REGINALD;SHALTIS, PHILLIP;RHEE, SOKWOO |
分类号 |
A61B5/00;(IPC1-7):A61B5/00;A61B5/024 |
主分类号 |
A61B5/00 |
代理机构 |
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