Invention Grant
- Patent Title: Systems and methods for determining respiration information using phase locked loop
- Patent Title (中): 使用锁相环确定呼吸信息的系统和方法
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Application No.: US13343389Application Date: 2012-01-04
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Publication No.: US09247896B2Publication Date: 2016-02-02
- Inventor: James Dripps , James Ochs , Paul S. Addison
- Applicant: James Dripps , James Ochs , Paul S. Addison
- Applicant Address: IE Mervue, Galway
- Assignee: Nellcor Puritan Bennett Ireland
- Current Assignee: Nellcor Puritan Bennett Ireland
- Current Assignee Address: IE Mervue, Galway
- Agency: Shvarts & Leiz LLP
- Main IPC: A61B5/08
- IPC: A61B5/08 ; A61B5/0295 ; A61B5/1455 ; A61B5/00
Abstract:
A patient monitoring system may receive a physiological signal such as a photoplethysmograph (PPG) signal that exhibits frequency and amplitude modulation based on respiration. A phase locked loop may generate a frequency demodulated signal and an amplitude demodulated signal from the PPG signal. An autocorrelation sequence may be generated for each of the frequency demodulated signal and the amplitude demodulated signal. The autocorrelation sequences may be combined and respiration information may be determined based on the combined autocorrelation sequence.
Public/Granted literature
- US20130172767A1 SYSTEMS AND METHODS FOR DETERMINING RESPIRATION INFORMATION USING PHASE LOCKED LOOP Public/Granted day:2013-07-04
Information query
