Saturation by pulse oximetry: Comparison of the results obtained by instruments of different brands

Thilo, Elizabeth H.; Andersen, Ditte K.; Wasserstein, Mitzi L.; Schmidt, Jeffrey M.; Luckey, Dennis W.

doi:10.1016/s0022-3476(05)83549-8

Cited by 60 publications

(38 citation statements)

References 23 publications

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“…Thilo (Thilo, 1993) it was found that for example the Nellcor N-100 consistently gave saturation results 1.5 to 2% higher than those of the Ohmeda Biox 3700. The difference in these results can be explained by the different empirical calibration curves used by each manufacturer and also on the way pulse oximeters display oxygen saturation.…”

Section: Ambient Lightmentioning

confidence: 95%

The Wavelength Dependence Of The Photoplethysmogram And Its Implication To Pulse Oximetry

Crowe¹,

Damianou²

1992

Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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The importance of complete opposition of the reflectance probe was examined on an adult finger. False low oxygen saturation readings were recorded with malpositioned probes. A new probe with modified geometry was designed which offered an improved performance in reducing this artifact and further suggestions were given for its possible elimination.Finally, a proposal for a novel, visible multi-wavelength reflection pulse oximeter is presented with the aim of replacing current pulse oximeters in certain situations where their use is questionable.

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Section: Ambient Lightmentioning

confidence: 95%

The Wavelength Dependence Of The Photoplethysmogram And Its Implication To Pulse Oximetry

Crowe¹,

Damianou²

1992

Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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“…11 In this study, it was found that the Nellcor SpO 2 correlated best with functional SaO 2 , that SpO 2 determined by different pulse oximeters in not interchangeable, and that this may be of clinical importance in predicting PaO 2 on the basis of SpO 2 . Fetal hemoglobin (HbF) shifts the oxyhemoglobin dissociation curve to the left.…”

Section: Discussionmentioning

confidence: 60%

“…Experimental data show that HbF has no clinically significant effects on pulse oximetry. [11][12][13][14][15] The degree of HbF of course affects the correlation of SaO 2 to PaO 2 . Clinicians concerned with PaO 2 value must understand the effect of HbF when interpreting the SpO 2 reading.…”

Section: Discussionmentioning

confidence: 99%

Reflectance Pulse Oximetry from Core Body in Neonates and Infants: Comparison to Arterial Blood Oxygen Saturation and to Transmission Pulse Oximetry

et al. 2004

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OBJECTIVE:To compare pulse oximetry oxygen saturation (SpO 2 ) measured by a novel reflectance method from core body to arterial oxygen saturation (SaO 2 ) in neonates and infants. Transmission pulse oximetry (TPO) was measured for comparison. STUDY DESIGN:We monitored 18 infants by the two pulse oximeters simultaneously. The reflectance pulse oximetry (RPO) (PRO2, ConMed, Utica, NY) was measured on the upper back or chest, while the TPO (N395-Nellcor, Pleasanton, CA) was measured from the finger of the infant on the left hand or feet. Data from the two methods were compared to functional SaO 2 derived from blood sample drawn from arterial line for patient care and measured by a Co-oximeter (Ilex, Instrument Lab. Lexington, MA). The potential advantage of the RPO is demonstrated in a case of a premature infant with hypovolemic shock, where SaO 2 or TPO could not be obtained but oximetry was available from the RPO. RESULTS:We used for analysis 56 RPO and 32 TPO measurements. SpO 2 obtained from the RPO was 88.3±9.8%, from the TPO 84.2±10.1%, and functional SaO 2 was 88.2±11.7%, with correlation coefficient of 0.93 and 0.88, respectively (p<0.0001). The mean difference (bias) and standard deviation of the differences (precision) between the RPO and the TPO compared to functional SaO 2 were À0.09±4.5% and 1.26±5.9% and the absolute errors were 3.2±3.1%, and 4.4±4.0%, respectively. The accuracy of both RPO and TPO was diminished when SaO 2 was <85%, but only the RPO remained correlated with the functional SaO 2 .CONCLUSIONS: Reflectance pulse oximetry measured from core body of neonates and infants is accurate and reliable and is comparable to the transmission SpO 2 when compared to functional SaO 2 . We speculate that the reflectance method might be advantageous in cases of poor peripheral perfusion in neonates and infants.

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“…36 A study of oximetry in exercising patients utilizing both ear probe models and finger probe equipped instruments noted limited accuracy in settings of severe desaturation, and owing to variations in signal strength, with mild superiority noted in the finger over the ear location. 37,38 New generation oximeters now widely in use employ enhanced signal processing algorithms and improved hardware to reduce sensitivity to motion and to variations in perfusion. 39 In the 6MWT, O 2 saturation by pulse oximetry is commonly recorded pre-exercise, and at the cessation of exercise.…”

Section: Pulse Oximetry: Its Role In Exercise Testingmentioning

confidence: 99%

Exercising Your Patient: Which Test(s) and When?

Pichurko

2012

Respir Care

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With the introduction of the stair climb test of surgical patients in the 1950s, the role of exercisebased testing as a useful diagnostic tool and an adjunct to conventional cardiopulmonary testing was established. Since then, we have witnessed a rapid development of numerous tests, varying in their protocols and clinical applications. The relatively simple "field tests" (shuttle walks, stair climb, 6-minute walk test) require minimal equipment and technical support, and so are generally available to physicians and patients. At the other end of the spectrum is the cardiopulmonary exercise test (CPET), more complex in its equipment requirements, technical support, and with an often complex interpretive strategy. The 6-minute walk test (6MWT), in particular, has evolved into a versatile study with diagnostic utility in many disorders, including COPD, pulmonary hypertension, interstitial lung disease, congestive heart failure, and in the pre-surgical evaluation of patients, among others. With the added dimensions of optional O 2 saturation monitoring and calculated post-exercise heart rate recovery, the 6MWT is providing important clinical information well beyond the measure of distance walked. Is it sufficiently robust and informative to replace the more demanding and less available CPET? In many instances, the clinical applications are overlapping, with the 6MWT functioning as an adequate surrogate. However, in the initial evaluation of unexplained dyspnea, in formal evaluation of impairment and disability, in detailed evaluation of congestive heart failure, and in the selected lung cancer patient prior to resection, CPET remains superior. Investigations of portable metabolic and cardiovascular monitoring devices aiming to enhance the diagnostic capabilities of 6MWT may further narrow or close the remaining gap between these two exercise studies.

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Saturation by pulse oximetry: Comparison of the results obtained by instruments of different brands

Cited by 60 publications

References 23 publications

The Wavelength Dependence Of The Photoplethysmogram And Its Implication To Pulse Oximetry

The Wavelength Dependence Of The Photoplethysmogram And Its Implication To Pulse Oximetry

Reflectance Pulse Oximetry from Core Body in Neonates and Infants: Comparison to Arterial Blood Oxygen Saturation and to Transmission Pulse Oximetry

Exercising Your Patient: Which Test(s) and When?

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