Adaptation of pulse oximetry for fetal monitoring during labour

Gardosi, Jason; Schram, Catharina; Symonds, E. M.

doi:10.1016/0140-6736(91)92928-u

Cited by 76 publications

(24 citation statements)

References 10 publications

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“…Optimism rose when it appeared possible to obtain signals from the fetal scalp during labour for pro longed periods [1][2][3]. Since then other reflectance sensors have been developed and experiences during labour have been reported [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

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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show abstract

“…The obvious problem is that the foetus is not accessible. The potential application of pulse oximetry to foetal monitoring during labour has been demonstrated by several groups (Gardosi et al 1991, Klauser et al 2005.…”

Section: Childbirthmentioning

confidence: 99%

Pulse oximetry in the oesophagus

Kyriacou

2005

Physiol. Meas.

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Pulse oximetry has been one of the most significant technological advances in clinical monitoring in the last two decades. Pulse oximetry is a noninvasive photometric technique that provides information about the arterial blood oxygen saturation (SpO 2 ) and heart rate, and has widespread clinical applications. When peripheral perfusion is poor, as in states of hypovolaemia, hypothermia and vasoconstriction, oxygenation readings become unreliable or cease. The problem arises because conventional pulse oximetry sensors must be attached to the most peripheral parts of the body, such as finger, ear or toe, where pulsatile flow is most easily compromised. Since central blood flow may be preferentially preserved, this review explores a new alternative site, the oesophagus, for monitoring blood oxygen saturation by pulse oximetry. This review article presents the basic physics, technology and applications of pulse oximetry including photoplethysmography. The limitations of this technique are also discussed leading to the proposed development of the oesophageal pulse oximeter. In the majority, the report will be focused on the description of a new oesophageal photoplethysmographic/SpO 2 probe, which was developed to investigate the suitability of the oesophagus as an alternative monitoring site for the continuous measurement of SpO 2 in cases of poor peripheral circulation. The article concludes with a review of reported clinical investigations of the oesophageal pulse oximeter.

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“…(1994) разработали метод отраженного излучения, при котором датчик с двумя свето-диодами и одним сенсором располагают на щеке ОБЗОры ТОМ LXIII ВЫПУСК 4/2014 плода или лопатки плода, т. е. на участках тела свободных от волосяного покрова, что исключает искажение сигнала [38,42,63,69]. Однако этот тип устройства сенсора имеет заметный недо-статок -неправильная установка датчика при-водит к искажению, либо к потере сигнала [37,39,56]. Точность фетальной пульсоксиметрии как средство мониторинга плода было оценено в ряде исследований, проводившихся с начала 90-х годов ХХ века.…”

unclassified

“…Было отмечено, что низкий SpO 2 плода (30 % в течение 10 минут) значимо коррелирует с низким рН крови у плода (<7,2) [47]. достоверные данные были получены в 58 % в одном исследовании [39], в 59,3 % в другом ис-следовании [43], в 75 % в третьем [53], и в 100 % в четвертом [33]. J. Didly соавт.…”

unclassified

Complex research of the functional status of fetal in labour

Kucherjavyy

2014

Z.akus.zen.bolezn

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Adaptation of pulse oximetry for fetal monitoring during labour

Cited by 76 publications

References 10 publications

Accuracy of fetal pulse oximetry and pitfalls in measurements

Accuracy of fetal pulse oximetry and pitfalls in measurements

Pulse oximetry in the oesophagus

Complex research of the functional status of fetal in labour

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