| 摘要 |
<p>A method and apparatus are disclosed for using photoplethysmography to obtain physiological parameter information related to respiration rate, heart rate, heart rate variability, blood volume variability and/or the autonomic nervous system. In one implementation, the process involves obtaining ( 2502 ) a pleth, filtering ( 2504 ) the pleth to remove unwanted components, identifying ( 2506 ) a signal component of interest, monitoring ( 2508 ) blood pressure changes, monitoring ( 2510 ) heart rate, and performing ( 2512 ) an analysis of the blood pressure signal to the heart rate signal to identify a relationship associated with the component of interest. Based on this relationship, the component of interest may be identified ( 2514 ) as relating to the respiration or Mayer Wave. If it is related to the respiration wave ( 2516 ), a respiratory parameter such as breathing rate may be determined ( 2520 ). Otherwise, a Mayer Wave analysis ( 2518 ) may be performed to obtain parameter information related to the autonomic nervous system.</p> |
