Pulse oximetry at two sensor placement sites in conscious foals

Abstract Background Pulse oximetry has not been thoroughly evaluated for assessment of oxygenation in conscious foals. Compared with invasive arterial blood sampling, it is a painless and non-invasive method for real-time monitoring of blood oxygen saturation. The aim of this prospective clinical st...

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Main Authors: Heini Sofia Rossi, Anna Kristina Mykkänen, Jouni Juho Tapio Junnila, Heli Katariina Hyytiäinen
Format: Article
Language:English
Published: BMC 2025-01-01
Series:Acta Veterinaria Scandinavica
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Online Access:https://doi.org/10.1186/s13028-025-00794-w
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author Heini Sofia Rossi
Anna Kristina Mykkänen
Jouni Juho Tapio Junnila
Heli Katariina Hyytiäinen
author_facet Heini Sofia Rossi
Anna Kristina Mykkänen
Jouni Juho Tapio Junnila
Heli Katariina Hyytiäinen
author_sort Heini Sofia Rossi
collection DOAJ
description Abstract Background Pulse oximetry has not been thoroughly evaluated for assessment of oxygenation in conscious foals. Compared with invasive arterial blood sampling, it is a painless and non-invasive method for real-time monitoring of blood oxygen saturation. The aim of this prospective clinical study was to evaluate the usability, validity, and reliability of pulse oximetry at two measuring sites (lip and caudal abdominal skin fold) for blood oxygen saturation measurement in conscious foals with and without respiratory compromise. Thirty-two foals under one month of age were used. Nineteen foals had normal respiratory and cardiovascular function, and 13 had pneumonia. Pulse oximetry with a transmittance sensor was performed in triplicate on each foal’s lip (n = 196 measurements) and/or skin fold (n = 338 measurements), and arterial blood sample was collected. The oxygen saturation values measured by pulse oximetry from the lip and skin fold were compared with each other (n = 58 measurement pairs) and with the calculated arterial oxygen saturation based on arterial blood samples (n = 93 measurement pairs). Furthermore, repeatability of the pulse oximetry measurements was assessed. Results Measured blood oxygen saturation was clearly associated with the calculated saturation, but on average (± SD) it was 1.8 (± 3.3) percentage units higher from the lip and 5.7 (± 4.3) percentage units higher from the skin fold than the calculated saturation. In concurrent lip and skin fold measurements within a foal, the skin fold measurements were 2.4 (± 2.4) percentage units higher than the lip measurements. The repeatability of three pulse oximetry saturation measurement results was moderate to good and significantly improved when the measurement furthest from the middle-measured value was excluded. The most deviating measurement was often obtained first. Pulse oximetry in general was well tolerated and easy to perform, but as expected in conscious foals, movement and contact problems generated occasional technical difficulties in some individuals. Conclusions In conscious foals, pulse oximetry with a transmittance sensor attached to the lip (but not to the skin fold) is a clinically applicable and valid method for arterial blood oxygen saturation determination. Several measurements should be obtained and outliers discarded to obtain a reliable result.
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spelling doaj-art-76ef9d909ace4b92bbfe3cc6ae9ce4452025-01-26T12:45:49ZengBMCActa Veterinaria Scandinavica1751-01472025-01-0167111210.1186/s13028-025-00794-wPulse oximetry at two sensor placement sites in conscious foalsHeini Sofia Rossi0Anna Kristina Mykkänen1Jouni Juho Tapio Junnila2Heli Katariina Hyytiäinen3Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of HelsinkiDepartment of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of HelsinkiEstiMates OyDepartment of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of HelsinkiAbstract Background Pulse oximetry has not been thoroughly evaluated for assessment of oxygenation in conscious foals. Compared with invasive arterial blood sampling, it is a painless and non-invasive method for real-time monitoring of blood oxygen saturation. The aim of this prospective clinical study was to evaluate the usability, validity, and reliability of pulse oximetry at two measuring sites (lip and caudal abdominal skin fold) for blood oxygen saturation measurement in conscious foals with and without respiratory compromise. Thirty-two foals under one month of age were used. Nineteen foals had normal respiratory and cardiovascular function, and 13 had pneumonia. Pulse oximetry with a transmittance sensor was performed in triplicate on each foal’s lip (n = 196 measurements) and/or skin fold (n = 338 measurements), and arterial blood sample was collected. The oxygen saturation values measured by pulse oximetry from the lip and skin fold were compared with each other (n = 58 measurement pairs) and with the calculated arterial oxygen saturation based on arterial blood samples (n = 93 measurement pairs). Furthermore, repeatability of the pulse oximetry measurements was assessed. Results Measured blood oxygen saturation was clearly associated with the calculated saturation, but on average (± SD) it was 1.8 (± 3.3) percentage units higher from the lip and 5.7 (± 4.3) percentage units higher from the skin fold than the calculated saturation. In concurrent lip and skin fold measurements within a foal, the skin fold measurements were 2.4 (± 2.4) percentage units higher than the lip measurements. The repeatability of three pulse oximetry saturation measurement results was moderate to good and significantly improved when the measurement furthest from the middle-measured value was excluded. The most deviating measurement was often obtained first. Pulse oximetry in general was well tolerated and easy to perform, but as expected in conscious foals, movement and contact problems generated occasional technical difficulties in some individuals. Conclusions In conscious foals, pulse oximetry with a transmittance sensor attached to the lip (but not to the skin fold) is a clinically applicable and valid method for arterial blood oxygen saturation determination. Several measurements should be obtained and outliers discarded to obtain a reliable result.https://doi.org/10.1186/s13028-025-00794-wArterial blood sampleEquineHorseNon-anaesthetisedOxygenationPulse oximeter
spellingShingle Heini Sofia Rossi
Anna Kristina Mykkänen
Jouni Juho Tapio Junnila
Heli Katariina Hyytiäinen
Pulse oximetry at two sensor placement sites in conscious foals
Acta Veterinaria Scandinavica
Arterial blood sample
Equine
Horse
Non-anaesthetised
Oxygenation
Pulse oximeter
title Pulse oximetry at two sensor placement sites in conscious foals
title_full Pulse oximetry at two sensor placement sites in conscious foals
title_fullStr Pulse oximetry at two sensor placement sites in conscious foals
title_full_unstemmed Pulse oximetry at two sensor placement sites in conscious foals
title_short Pulse oximetry at two sensor placement sites in conscious foals
title_sort pulse oximetry at two sensor placement sites in conscious foals
topic Arterial blood sample
Equine
Horse
Non-anaesthetised
Oxygenation
Pulse oximeter
url https://doi.org/10.1186/s13028-025-00794-w
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AT jounijuhotapiojunnila pulseoximetryattwosensorplacementsitesinconsciousfoals
AT helikatariinahyytiainen pulseoximetryattwosensorplacementsitesinconsciousfoals