| 摘要 |
A method and apparatus are disclosed for using photoplethysmography to obtain physiological parameter information related to respiration or the autonomic nervous system. In one implementation, the process involves obtaining ( 602 ) a pleth, filtering ( 604 ) the pleth to remove unwanted components, identifying ( 606 ) a signal component of interest based on the filtered signal, monitoring ( 608 ) blood pressure changes, monitoring ( 610 ) heart rate, and performing ( 612 ) an analysis of the blood pressure signal to the heart rate signal to identify a phase relationship associated with the component of interest. Based on this phase relationship, the component of interest may be identified ( 614 ) as relating to the respiration or Mayer Wave. If it is related to the respiration wave ( 616 ), a respiratory parameter such as breathing rate may be determined ( 620 ). Otherwise, a Mayer Wave analysis ( 618 ) may be performed to obtain parameter information related to the autonomic nervous system.
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