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.
|
申请公布号 |
US6699199(B2) |
申请公布日期 |
2004.03.02 |
申请号 |
US20020167069 |
申请日期 |
2002.06.11 |
申请人 |
MASSACHUSETTS INSTITUTE OF TECHNOLOGY |
发明人 |
ASADA HARUHIKO H.;HUTCHINSON REGINALD C.;SHALTIS PHILLIP;RHEE SOKWOO |
分类号 |
A61B5/00;(IPC1-7):A61B5/02 |
主分类号 |
A61B5/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|