Utility of the Photoplethysmogram in Circulatory Monitoring

The photoplethysmogram is a noninvasive circulatory signal related to the pulsatile volume of blood in tissue and is displayed by many pulse oximeters and bedside monitors, along with the computed arterial oxygen saturation. The photoplethysmogram is similar in appearance to an arterial blood pressu...

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Published inAnesthesiology (Philadelphia) Vol. 108; no. 5; pp. 950 - 958
Main Authors REISNER, Andrew, SHALTIS, Phillip A, MCCOMBIE, Devin, ASADA, H. Harry
Format Journal Article
LanguageEnglish
Published Hagerstown, MD Lippincott 01.05.2008
Subjects
Anesthesia
Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy
Arteries - physiology
Biological and medical sciences
Blood Pressure - physiology
Blood Volume - physiology
Hemodynamics
Humans
Medical sciences
Oscillometry
Oximetry
Photography
Plethysmography - methods
Skin - blood supply
Anesthesia
Monitoring
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Summary:The photoplethysmogram is a noninvasive circulatory signal related to the pulsatile volume of blood in tissue and is displayed by many pulse oximeters and bedside monitors, along with the computed arterial oxygen saturation. The photoplethysmogram is similar in appearance to an arterial blood pressure waveform. Because the former is noninvasive and nearly ubiquitous in hospitals whereas the latter requires invasive measurement, the extraction of circulatory information from the photoplethysmogram has been a popular subject of contemporary research. The photoplethysmogram is a function of the underlying circulation, but the relation is complicated by optical, biomechanical, and physiologic covariates that affect the appearance of the photoplethysmogram. Overall, the photoplethysmogram provides a wealth of circulatory information, but its complex etiology may be a limitation in some novel applications.
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ISSN:0003-3022
1528-1175
DOI:10.1097/aln.0b013e31816c89e1