U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Monitoring respiration based on plethysmographic heart rate signal

Patent 6702752 Issued on March 9, 2004. Estimated Expiration Date: Icon_subject February 22, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

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Inventor

Assignee

Application

No. 10/081719 filed on 02/22/2002

US Classes:

600/484, Detecting respiratory condition600/479, Cardiovascular testing600/483, Simultaneously detecting cardiovascular condition and diverse body condition600/500Detecting blood vessel pulsation

Examiners

Primary: Hindenburg, Max
Assistant: Natnithithadha, Navin

Attorney, Agent or Firm

International Classes

A61B 5/024 (20060101)
A61B 5/08 (20060101)
A61B 5/00 (20060101)

Abstract

A pleth signal is analyzed to identify a heart rate variability parameter associated with respiration rate. In one embodiment, an associated process involves obtaining a photoplethysmograpic signal, processing the pleth signal to obtain heart rate samples, monitoring the heart rate sample to identify a heart rate variability associated with respiration, and determining a respiration rate based on the heart rate variability. The photoplethysmographic signal may be based on one or more channel signals of a conventional pulse oximeter. The invention thus allows for noninvasive monitoring of respiration rate and expands the functionality of pulse oximeters.

Other References

  • Spectral Analysis: Review "Heart Rate Variability", Lukas Spieker, hemodynamics.ucdavis.edu, Unknown Publication Date
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