Accuracy of Response of Six Pulse Oximeters to Profound Hypoxia

Severinghaus, John W.; Naifeh, Karen H.

doi:10.1097/00000542-198710000-00017

Cited by 282 publications

(83 citation statements)

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“…The accu racy of the instrument in the present study under un selected conditions was presumably affected by envi ronmental noise (emergency room and different wards) as well as by intersubject variance (123 pa tients). Nevertheless, the readings obtained in the lung disease patients were comparable to those ob tained with the Pulsox-7 oximeter and other commer cially available devices testing with the finger probe in only a few (5-10) healthy subjects during experimental hypoxia [4,5].…”

Section: Discussionsupporting

confidence: 69%

Accuracy and Response Time of a Portable Pulse Oximeter

Modica

Rizzo²

1991

Respiration

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We studied the performance of a portable pulse oximeter in 123 consecutive adult patients by spot-checking with a finger probe and by spectrophotometry of oxygen saturation on a simultaneous arterial blood sample. 88 patients were overtly hypoxemic (HbO₂ < 90%) and 26 showed severe hypoxemia (HbO₂ 36–70%). The differences between the two methods showed a skewed distribution with a positive tail due to the over-estimation of lower saturation values by the pulse oximeter. Overall, the 95% confidence interval for the median difference ranged from -0.6 to +0.5%. The limits of agreement (distribution-free 95% confidence interval for the sample) were -5.8 to +11.6%. Pulse oximetry can be recommended as a first assessment of the respiratory balance only if a cut-off value of HbO₂ equal to 90% in nonsmoking, air-breathing subjects is acceptable. The finger probe implies a response delay of approximately 30 s, making the instrument rather insensitive to short hypoxemic transients. With a predictive value around 90%, the pulse oximeter may be a useful portable screening tool

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Section: Discussionsupporting

confidence: 69%

Accuracy and Response Time of a Portable Pulse Oximeter

Modica

Rizzo²

1991

Respiration

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“…The impact of probe site placement on SpO 2 accuracy and response time has been previously investigated. 5,15,[17][18][19][20][21] Iyer et al 5 reported no difference between hand and foot probe sites in infants less than 3 months of age undergoing cardiac surgery with cardiopulmonary bypass. Warley et al 18 described finger and toe response time to be proportionately longer than ear probe response in normal subjects and attributed this finding to increased lung to periphery circulation times.…”

Section: Discussionmentioning

confidence: 99%

Accuracy of pulse oximeter readings from probe placement on newborn wrist and ankle

et al. 2011

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Objective: To compare the accuracy of pulse oximetry oxygen saturation (SpO 2 ) measured on the wrist compared with the ipsilateral palm, and SpO 2 measured on the ankle compared with the ipsilateral sole.Study Design: In this prospective observational study, neonates admitted to the neonatal intensive care unit were enrolled. We recorded SpO 2 (Masimo Radical-7 pulse oximeter) detected at the palm and ipsilateral wrist initially, then at 30 s, and at 1 min, and we repeated the same procedure over the sole and ipsilateral ankle. We recorded the time to obtain the SpO 2 readings from all these sites. Regression analysis was performed to determine the relationship between paired SpO 2 measurements. The mean difference (bias) and standard deviation of the paired SpO 2 differences (precision) were calculated (Bland-Altman plots).Result: A total of 150 patients (birth weight 2381±1020 g, gestational age 34.3 ± 4.3 weeks, median postnatal age 3.5 days (25th-75th percentile 1-16 days)) were enrolled. There was a good correlation between SpO 2 measured at the palm versus the wrist (r ¼ 0.95, P<0.001 (right); r ¼ 0.97, P< 0.001 (left)) and between SpO 2 measured at the sole versus the ankle (r ¼ 0.92, P<0.001 (right); r ¼ 0.91, P<0.001 (left)). There was also a good agreement between paired SpO 2 measurements from these sites. The bias and precision for SpO 2 at the right palm and right wrist was 0.08 ± 0.94% and for the left palm and left wrist 0.22 ± 0.87%. Similarly, the bias and precision for SpO 2 at the right sole and right ankle was À0.03 ± 0.93% and for the left sole and left ankle was À0.01 ± 0.93%. Conclusion:Our results show that the wrist and ankle can be used as alternative sites to measure SpO 2 in newborn infants in place of the routinely used palm or sole.

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“…Delays in detection of hypoxemia have also been observed by others. Severinghaus and Naifeh reported delays of 14-24 seconds between ear and finger sensors during rapidly induced hypoxemia [5]. In a later study, Severinghaus and Spellman reported a single case of delayed hypoxia detection of 6 minutes during gravitational hypotension, induced by holding the hand well above the head [6].…”

Section: Resultsmentioning

confidence: 98%

Physiologic Considerations in Detection of Hypoxemia during Vasoconstriction: Radial Artery Compared to Various Pulse Oximeter Sensor Sites

DE¹

2017

JLPRR

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Accuracy of Response of Six Pulse Oximeters to Profound Hypoxia

Cited by 282 publications

References 0 publications

Accuracy and Response Time of a Portable Pulse Oximeter

Accuracy and Response Time of a Portable Pulse Oximeter

Accuracy of pulse oximeter readings from probe placement on newborn wrist and ankle

Physiologic Considerations in Detection of Hypoxemia during Vasoconstriction: Radial Artery Compared to Various Pulse Oximeter Sensor Sites

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