Pulse Oximetry

Tremper, Kevin K.; Barker, Steven J.

doi:10.1097/00000542-198901000-00019

Cited by 426 publications

(130 citation statements)

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“…1000). Most articles are based on transmission pulse oximetry for an Sao2 range of 70-100% , and have been exten sively reviewed elsewhere [8][9][10][11][12],…”

Section: R Nijland Et a L / European Journal O F Obstetricsmentioning

confidence: 99%

“…The amplitude of the pulsatile component of the signal is often below 0.2% of the total signal, which is at the lower limit of signal acceptance for some commercial transmission pulse oximeters [8,40]. These small pulses lead to a lower signal to noise ratio and as a conse quence a less accurate device.…”

Section: Technical Problemsmentioning

confidence: 99%

“…First, LEDs with center wave lengths which fall outside a specified range may be rejected. Second, the pulse oximeter may be pro grammed to accept several ranges of LED center wavelength for both the red and infrared, and to correct for these different wavelengths internally [8],…”

Section: Technical Problemsmentioning

confidence: 99%

See 2 more Smart Citations

Accuracy of fetal pulse oximetry and pitfalls in measurements

Nijland¹,

Jongsma²,

Nijhuis³

et al. 1997

European Journal of Obstetrics & Gynecology and Reproductiv

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Pulse oximetry is a technique for estimating arterial oxygen saturation continuously and non-invasively. Reflectance pulse oximetry might become useful for monitoring the fetus during labour but it is much more susceptible to all kinds of physiological variations than the well-established transmission pulse oximetry for neonatal or adult monitoring. This review focuses on the accuracy of reflectance pulse oximetry. Results of human, animal, in vitro and theoretical models indicate that factors such as; blood volume fraction differences, haematocrit, and blood flow differences are major sources for inaccurate pulse oximetry readings in the fetal arterial oxygen saturation range of 10-80%. These factors cannot be overcome by systems using two wavelengths sensors with the 660/890 or 940 nm combination. Reported precision values (S.D. of difference between pulse oximeter and blood sample saturation) range between 2.5 and 12.9% for various 660 nm sensors. Most sensors were tested only once with a limited number of animals. A new 735/890 nm sensor (Nellcor Puritan Bennett) demonstrates a promising accuracy (precision around 5%) in two studies. Various other sensors have also been developed, but are not or scarcely evaluated. Without thorough establishment of the reliability of this technique, clinical fetal oxygen saturation data are still of limited value.

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“…1000). Most articles are based on transmission pulse oximetry for an Sao2 range of 70-100% , and have been exten sively reviewed elsewhere [8][9][10][11][12],…”

Section: R Nijland Et a L / European Journal O F Obstetricsmentioning

confidence: 99%

Section: Technical Problemsmentioning

confidence: 99%

See 1 more Smart Citation

Accuracy of fetal pulse oximetry and pitfalls in measurements

Nijland¹,

Jongsma²,

Nijhuis³

et al. 1997

European Journal of Obstetrics & Gynecology and Reproductiv

View full text Add to dashboard Cite

show abstract

“…Such intraindividual variations in blood gases are probably attributable to uterine contractures, fetal movements, and maternal movements,Ir'' 10 which may lead to varia tions in Sa()2 of 15% to 20% and variations in pH of 0.03. 10 In all experiments in group 1, extracellular fluid base excess began to decrease at an Sao2 level <30%, As a result of the baseline variations, however, we had to calculate moving averages of Sao2 and extracellular fluid base excess to detect the starting point of acidosis. Reduction to an Sao2 level of 30% to 40% in group 2 resulted only in small and nonprogressive decreases in pH immediately after the initial partial occlusion.…”

Section: Commentmentioning

confidence: 99%

Arterial oxygen saturation in relation to metabolic acidosis in fetal lambs

Nijland

Jongsma

Nijhuis

et al. 1995

American Journal of Obstetrics and Gynecology

104

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March 1995 Am J Obstet Gynecol most of the preterm newborns <32 weeks. It remains to be determined whether increased tolerance of asphyxia or greater difficulty in recognition of severe complica tions in preterm newborns <32 weeks are factors con tributing to these results, Apgar scores are valuable predictors of newborn complications in the preterm newborns of both the asphyxia and control groups. However, as in the term newborn/1 the Apgar score at 1 minute is a better predictor than the Apgar score at 5 minutes.The results of this study indicate that intrapartum fetal asphyxia with metabolic acidosis is an important factor in the occurrence of severe complications in the central nervous system, respiratory system, and kidney in preterm newborns. Low JA, Panagiotopoulos C, Derrick EJ. Newborn compli cations after intrapartum asphyxia with metabolic acidosis in the term fetus. Am J O bs'i t-rr

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“…NIRS and NIRI are applied in many clinical applications, using different types of instruments to track oxygenation and blood flow in tissue [14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Many of these applications could profit from textile integrated optic devices, as described in [22].…”

Section: Introductionmentioning

confidence: 99%

Textile integrated sensors and actuators for near-infrared spectroscopy

Zysset¹,

Nasseri²,

Büthe³

et al. 2013

Opt. Express

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Being the closest layer to our body, textiles provide an ideal platform for integrating sensors and actuators to monitor physiological signals. We used a woven textile to integrate photodiodes and light emitting diodes. LEDs and photodiodes enable near-infrared spectroscopy (NIRS) systems to monitor arterial oxygen saturation and oxygenated and deoxygenated hemoglobin in human tissue. Photodiodes and LEDs are mounted on flexible plastic strips with widths of 4 mm and 2 mm, respectively. The strips are woven during the textile fabrication process in weft direction and interconnected with copper wires with a diameter of 71 m in warp direction. The sensor textile is applied to measure the pulse waves in the fingertip and the changes in oxygenated and deoxygenated hemoglobin during a venous occlusion at the calf. The system has a signal-to-noise ratio of more than 70 dB and a system drift of 0.37% ± 0.48%. The presented work demonstrates the feasibility of integrating photodiodes and LEDs into woven textiles, a step towards wearable health monitoring devices. Abstract: Being the closest layer to our body, textiles provide an ideal platform for integrating sensors and actuators to monitor physiological signals. We used a woven textile to integrate photodiodes and light emitting diodes. LEDs and photodiodes enable near-infrared spectroscopy (NIRS) systems to monitor arterial oxygen saturation and oxygenated and deoxygenated hemoglobin in human tissue. Photodiodes and LEDs are mounted on flexible plastic strips with widths of 4 mm and 2 mm, respectively. The strips are woven during the textile fabrication process in weft direction and interconnected with copper wires with a diameter of 71 μm in warp direction. The sensor textile is applied to measure the pulse waves in the fingertip and the changes in oxygenated and deoxygenated hemoglobin during a venous occlusion at the calf. The system has a signalto-noise ratio of more than 70 dB and a system drift of 0.37% ± 0.48%. The presented work demonstrates the feasibility of integrating photodiodes and LEDs into woven textiles, a step towards wearable health monitoring devices. ©2013 Optical Society of America

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Pulse Oximetry

Cited by 426 publications

References 0 publications

Accuracy of fetal pulse oximetry and pitfalls in measurements

Accuracy of fetal pulse oximetry and pitfalls in measurements

Arterial oxygen saturation in relation to metabolic acidosis in fetal lambs

Textile integrated sensors and actuators for near-infrared spectroscopy

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