OBJECTIVE: Prospective assessment of the accuracy of three pulse oximeters and two probe sites in darkly pigmented critically ill patients under clinical conditions. PATIENTS AND METHODS: One hundred consecutive, darkly pigmented critically ill adult patients with arterial lines in situ were studied. Patients were excluded if the haemoglobin concentration was less than 7 g/dl and carboxyhaemoglobin or methaemoglobin levels exceeded 2%. Pigmentation was objectively quantified with a portable EEL reflectance spectrophotometer (Evans Electroselenium Company, Diffusion Systems Limited, London). Reflectance was measured at nine wavelengths. RESULTS: The degree of pigmentation as measured by percentage reflectance closely matched that of a control group of black Africans from a pigmentation study. The limits of agreement (2.6% to 5.8%), precision and bias values between pulse oximeter and co-oximeter readings fell within a narrow range. The 95% confidence intervals of the limits of agreement reflected a small variation in the difference between pulse oximeter and co-oximeter readings. These small differences were not clinically significant in the pigmented patients who were enrolled in the study. CONCLUSION: The accuracy of pulse oximetry is not adversely affected by skin pigmentation, and it remains a useful oxygenation monitoring device in darkly pigmented patients.
OBJECTIVE: Prospective assessment of the accuracy of three pulse oximeters and two probe sites in darkly pigmented critically illpatients under clinical conditions. PATIENTS AND METHODS: One hundred consecutive, darkly pigmented critically ill adultpatients with arterial lines in situ were studied. Patients were excluded if the haemoglobin concentration was less than 7 g/dl and carboxyhaemoglobin or methaemoglobin levels exceeded 2%. Pigmentation was objectively quantified with a portable EEL reflectance spectrophotometer (Evans Electroselenium Company, Diffusion Systems Limited, London). Reflectance was measured at nine wavelengths. RESULTS: The degree of pigmentation as measured by percentage reflectance closely matched that of a control group of black Africans from a pigmentation study. The limits of agreement (2.6% to 5.8%), precision and bias values between pulse oximeter and co-oximeter readings fell within a narrow range. The 95% confidence intervals of the limits of agreement reflected a small variation in the difference between pulse oximeter and co-oximeter readings. These small differences were not clinically significant in the pigmentedpatients who were enrolled in the study. CONCLUSION: The accuracy of pulse oximetry is not adversely affected by skin pigmentation, and it remains a useful oxygenation monitoring device in darkly pigmentedpatients.
Authors: Cynthia M Beall; Michael J Decker; Gary M Brittenham; Irving Kushner; Amha Gebremedhin; Kingman P Strohl Journal: Proc Natl Acad Sci U S A Date: 2002-12-05 Impact factor: 11.205
Authors: Timo Leppänen; Samu Kainulainen; Henri Korkalainen; Saara Sillanmäki; Antti Kulkas; Juha Töyräs; Sami Nikkonen Journal: Adv Exp Med Biol Date: 2022 Impact factor: 3.650
Authors: Chunhu Shi; Mark Goodall; Jo Dumville; James Hill; Gill Norman; Oliver Hamer; Andrew Clegg; Caroline Leigh Watkins; George Georgiou; Alexander Hodkinson; Catherine Elizabeth Lightbody; Paul Dark; Nicky Cullum Journal: BMC Med Date: 2022-08-16 Impact factor: 11.150