Comparison of a pulse oximeter with an ear oximeter and an in-vitro oximeter

Mackenzie, Nick

doi:10.1007/bf02832255

Cited by 33 publications

(7 citation statements)

References 8 publications

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“…The discovery that enabled all others to come together in a single instrument was the combination of transmission oximetry and photoplethysmography in 1974 by Aoyagi et al [7], who developed the first pulse oximeter. Space does not permit mention of the countless others whose work led to the discovery of Aoyagi et at, but this incomplete list of people and ideas is itemized more fully in several good articles [8,9], notably the superb historical work by Severinghaus and Astrup [3,10].…”

Section: Historymentioning

confidence: 99%

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Pulse oximetry

Kelleher

1989

J Clin Monitor Comput

179

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The pulse oximeter, a widely used noninvasive monitor of arterial oxygen saturation, has numerous applications in anesthesiology and critical care. Although pulse oximetry is considered sufficiently accurate for many clinical purposes, there are significant limitations on the accuracy and availability of pulse oximetry data. This article reviews both the clinical uses of the pulse oximeter and the limitations on its performance. The pulse oximeter is generally acknowledged to be one of the most important advances in the history of clinical monitoring.

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Section: Historymentioning

confidence: 99%

“…Note that the two species of hemoglobin differ widely from each other at each of the wavelengths shown, and differ widely from themselves across the two wavelengths; both d~ferences are important for optimum accuracy in pulse oximetry. From Mackenzie [9]. Used with permission.…”

Section: Technologymentioning

confidence: 99%

Pulse oximetry

Kelleher

1989

J Clin Monitor Comput

179

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“…7 The pulse oximeter uses two high-intensity light-emitting diodes each of which emits a constant monochromatic wavelength of light throughout its life so that it only needs calibration once in the factory. 8 Two wavelengths of light used are one in which oxyhemoglobin predominates (660 nm) and the other in which reduced hemoglobin predominates (940 nm). 8 The light absorption characteristics of oxygenated and nonoxygenated hemoglobin at each wavelength during and after an arterial pulse are used to compute the arterial oxygen saturation.…”

Section: Methodsmentioning

confidence: 99%

“…8 Two wavelengths of light used are one in which oxyhemoglobin predominates (660 nm) and the other in which reduced hemoglobin predominates (940 nm). 8 The light absorption characteristics of oxygenated and nonoxygenated hemoglobin at each wavelength during and after an arterial pulse are used to compute the arterial oxygen saturation. 8 " 10 By using the principles of plethysmography, the amount of light absorbed by nonpulsating structures (skin, bone, soft tissue, venous and capillary blood) is eliminated from the computations; 8 " 10 however, the result is influenced by methemoglobin and carboxyhemoglobin levels.…”

Section: Methodsmentioning

confidence: 99%

Pulse Oximetry in Sick Premature Infants and the Effects of Phototherapy and Radiant Warmers on the Oxygen Saturation Readout

Zubrow¹,

Henderson²,

Imaizumi³

et al. 1990

Amer J Perinatol

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Forty-five arterial blood samples for oxygen saturation on 15 sick premature infants were significantly correlated with pulse oximeter determinations (r = 0.87, p less than 0.0001) giving a regression equation of y = 1.19X - 18.15. Chronologic age in the first 2 weeks of life did not alter the accuracy of the pulse oximeter. Four groups (in isolette with phototherapy off, in isolette with phototherapy on, on radiant warmer with phototherapy off, and on radiant warm with phototherapy on) were observed to see if environmental light and energy would affect pulse oximetry oxygen saturation values; no effect was observed. Therefore the pulse oximeter is an accurate machine to assess sick premature infant oxygen saturation. The measurements are not altered by environmental light.

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“…By excluding the absorbance of the constant part of the signal the arterial saturation is recorded and has been shown to reflect simultaneous invasive measurements accurately (Yelderman et al, 1983;Mackenzie, 1985).…”

mentioning

confidence: 99%

Pulse oximetry in the accident and emergency department.

Holburn

Allen

1989

Emergency Medicine Journal

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SUMMARYThe early detection and treatment of hypoxia is important to reduce patient morbidity in the accident and emergency department. At present, the commonly used methods all have practical difficulties in the urgent situations that prevail in the department. Pulse oximetry has recently become a method of choice in many anaesthetic and intensive care units for the continuous monitoring of oxygenation and the early detection of hypoxia.As similar conditions prevail in the accident and emergency departnent, we have attempted to evaluate its ease of use and the quality of information obtained in our department.Patients presenting with chest pain to an accident and emergency department have their oxygen saturation measured by the pulse oximeter finger probe prior to the commencement of oxygen therapy. After 5 min of oxygen therapy, the measurement was repeated. Our result showed that although no patients could be judged as hypoxic on clinical grounds the pulse oximeter showed, within 30 s of admission, that a number had an abnormal oxygen saturation. Continuous monitoring with the probe after the application of low flow oxygen therapy also aided in monitoring their treatment and this improvement was again easily and quickly recorded.Our experience shows that the pulse oximeter may be a useful tool for evaluating hypoxia and oxygen therapy in the accident and emergency department and we feel that we should be one of the groups who should reply in the positive to Zorab's question, 'Who needs pulse oximetry?' (Zorab, 1988).

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Comparison of a pulse oximeter with an ear oximeter and an in-vitro oximeter

Cited by 33 publications

References 8 publications

Pulse oximetry

Pulse oximetry

Pulse Oximetry in Sick Premature Infants and the Effects of Phototherapy and Radiant Warmers on the Oxygen Saturation Readout

Pulse oximetry in the accident and emergency department.

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