Method and apparatus for detecting optical pulses
Pulse oximeter with physical motion sensor
Apparatus for the detection of motion transients
Method for measuring scattering medium and apparatus for the same
Offset pulse oximeter sensor Patent #: 5800349
ApplicationNo. 155586 filed on 03/25/1999
US Classes:600/323Oxygen saturation, e.g., oximeter
ExaminersPrimary: Winakur, Eric F.
Attorney, Agent or Firm
Foreign Patent References
International ClassA61B 005/00
Foreign Application Priority Data1996-04-01 CH
AbstractIn the proposed method for detecting spurious signals caused by movements of the patient or his environment in the pulse oximetric measurement of the arterial oxygen saturation, the intensity of the light emerging from the test specimen is measured by two photodiodes (7, 8). The signals (S1, S2) generated at these photodiodes (7, 8) are normalized to equal levels of their DC components. Finally, to detect spurious signals caused by movements, the differences (ƊSn) of these normalized signals (S1n, S2n) are formed.