Pulse Oximetry and Circulatory Kinetics Associated with Pulse Volume Amplitude Measured by Photoelectric Plethysmography

Kim, Jong Min; Arakawa, Kasumi; Benson, Kirk T.; Fox, Deanna K.

doi:10.1213/00000539-198612000-00015

Cited by 68 publications

(27 citation statements)

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“…Our data would support the view that vagal RR interval changes are not important for the genesis of ventilatory plethysmograph periodicities since high frequency power is maintained throughout the anaesthetic induction period in both AC and DC signals, in contrast to the accompanying decrease in high frequency RR variability [13]. Kim et al demonstrated a good relationship between fluctuations in AC signal and digital venous pressure suggesting that venous back pressure is a major mechanism [15]. Thus an increase in intrathoracic pressure results in an increase in back pressure to the finger and ear venules, capillaries and arterioles.…”

Section: Discussionsupporting

confidence: 85%

Spectral analysis of AC and DC components of the pulse photoplethysmograph at rest and during induction of anaesthesia

Larsen

Harty

Thiruchelvam

et al. 1997

Int. J. Clin. Mon. Comp.

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We examined spectral components of beat to beat variability in AC and DC signals of the reflectance photoplethysmograph at finger and earlobe sites in 20 resting volunteers and 20 patients during propofol, alfentanil, isoflurane, nitrous oxide anaesthesia. We observed that at rest, the majority of spectral power at both sites and in both signals was in the low 'thermoregulatory' frequency band (0.01-0.08 Hz). These fluctuations were greater in the finger than in the earlobe and in the AC signal compared to the DC. With anaesthesia, low as well as mid (0.08-0.15 Hz) frequency variability decreased at both sites and in both signals whereas high frequency 'ventilatory' power (0.15-0.45 Hz) was maintained. During anaesthesia we found no significant differences between the spectral components of the AC or DC signals or between the finger and the earlobe sites. At all frequencies, the fluctuations in the AC and DC signals were out of phase with each other.

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Section: Discussionsupporting

confidence: 85%

Spectral analysis of AC and DC components of the pulse photoplethysmograph at rest and during induction of anaesthesia

Larsen

Harty

Thiruchelvam

et al. 1997

Int. J. Clin. Mon. Comp.

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“…In such common measurement locations, the photoplethysmogram is primarily cutaneous, 6 perhaps arising largely from volume changes in venules that are fed by arteriovenous fistulas. 7,8 However, when the irradiated tissue includes larger, distinct blood vessels, as are found in the forehead, neck, or inguinal canal, the optics are more complex; distinct vessels can alter the photoplethysmogram (as well as the accuracy of pulse oximeters). 9 -11 Light propagation through a heterogeneous medium has been subjected to substantial theoretical consideration (e.g., references 12-16).…”

Section: Optical Factorsmentioning

confidence: 99%

Utility of the Photoplethysmogram in Circulatory Monitoring

Shaltis²,

et al. 2008

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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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“…The magnitude of the effect is, both in the theoretical models as well as in our in vivo model, significant. Venous pulsations are reported to give an underestimation of the Sa0 2 , for normal adult S a0 2 values around 96% SaOa [16]. We did not observe any pulsations of the subcutaneous vein, but we cannot exclude this completely as it may have been present but unnoticed.…”

Section: Discussionmentioning

confidence: 54%

Reflectance pulse oximetry in fetal lambs: Subcutaneous vessels and vasoconstriction affect its reliability

Nijland¹,

Jongsma²,

Verbruggen³

et al. 1996

J Clin Monitor Comput

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Pulse Oximetry and Circulatory Kinetics Associated with Pulse Volume Amplitude Measured by Photoelectric Plethysmography

Cited by 68 publications

References 0 publications

Spectral analysis of AC and DC components of the pulse photoplethysmograph at rest and during induction of anaesthesia

Spectral analysis of AC and DC components of the pulse photoplethysmograph at rest and during induction of anaesthesia

Utility of the Photoplethysmogram in Circulatory Monitoring

Reflectance pulse oximetry in fetal lambs: Subcutaneous vessels and vasoconstriction affect its reliability

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