Comparison of arterial blood pressure measurements obtained invasively or oscillometrically using a Datex S/5 Compact monitor in anaesthetised adult horses.
Abstract: To assess agreement between noninvasive blood pressure (NIBP) oscillometrically-derived values from a multiparameter monitor (Datex Ohmeda S/5 Compact) with those obtained by invasive blood pressure (IBP) measurement in anaesthetised horses undergoing elective surgery. Methods: Prospective clinical study. Methods: A total of 40 healthy adult horses. Methods: Horses were anaesthetised with various anaesthetic protocols (based on clinical requirements). Depending on positioning, cannulation of the facial or lateral metatarsal artery was performed for IBP measurement. The cannula was connected via a transducer to the monitor. An appropriately sized NIBP cuff was placed around the tail base and connected to the same monitor. Systolic (SAP), mean (MAP) and diastolic (DAP) arterial blood pressures were continuously recorded from the invasive system, and at 3 minute intervals from the oscillometric system, throughout the surgical procedure using a Datex iCollect program. An appropriate arithmetic correction factor was applied to the oscillometric results where the cuff was not level with the heart. Assessment of the degree of agreement between invasive and noninvasive readings at each time point was performed using a modified Bland-Altman analysis. Results: While in many horses there was relatively close correlation between the values obtained over time, there was substantial variability in individual animals which resulted in wide Bland-Altman limits of agreement. The oscillometric device over-reads by approximately 32, 23 and 22 mmHg, and under-reads by 26, 17 and 19 mmHg for SAP, MAP and DAP, respectively, compared with the IBP values. However, using the mean difference and standard deviation, the device conforms to American College of Veterinary Internal Medicine (ACVIM) standards. Conclusions: Oscillometric blood pressure measurement using the Datex Ohmeda S/5 Compact multiparameter monitor conforms to ACVIM standards when the NIBP cuff is placed on the tail. However, because of the wide variability in measurements, we cannot recommend this technique to guide therapy in anaesthetised adult horses.
Copyright © 2017 Association of Veterinary Anaesthetists and American College of Veterinary Anesthesia and Analgesia. Published by Elsevier Ltd. All rights reserved.
Publication Date: 2017-01-11 PubMed ID: 28528758DOI: 10.1016/j.vaa.2016.05.008Google Scholar: Lookup
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- Clinical Study
- Comparative Study
- Journal Article
Summary
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This research article investigates the consistency between non-invasive, oscillometric blood pressure measurements and invasive blood pressure measurements in anesthetized horses using a specific multiparameter monitor. The findings suggest that the variability of measurements prevents the non-invasive method from being recommended for therapy guidance in anesthetized adult horses.
Research Methods
- The researchers conducted a prospective clinical study on 40 healthy adult horses who were put under anesthesia for elective surgery.
- Depending on the positioning of the horses, either the facial or lateral metatarsal artery was cannulated for invasive blood pressure (IBP) measurement.
- The cannula was then connected to a Datex Ohmeda S/5 Compact monitor via a transducer.
- An appropriately sized noninvasive blood pressure (NIBP) cuff was positioned around the horse’s tail base and connected to the same monitor.
- Systolic (SAP), mean (MAP), and diastolic (DAP) arterial blood pressures were continuously recorded from both IBP and NIBP.
- The NIBP oscillometric results were corrected arithmetically when the cuff was not level with the horse’s heart.
- Data from both methods were analysed using a modified Bland-Altman analysis to determine the degree of agreement.
Key Results
- A significant degree of individual variability was found, leading to wide Bland-Altman limits of agreement, despite many horses showing relatively close correlation in measurements over time.
- The oscillometric device displayed a tendency for over-reading by around 32, 23, and 22 mmHg, and under-reading by approximately 26, 17, and 19 mmHg for SAP, MAP and DAP respectively, in comparison to the IBP readings.
- Despite this, the device complies with standards outlined by the American College of Veterinary Internal Medicine (ACVIM) when considering the mean difference and standard deviation.
Conclusions
- Although the oscillometric measurements are within ACVIM standards, the high degree of measurement variability means the authors do not recommend the noninvasive technique for guiding therapy in anesthetized adult horses.
- Further research and improvement in the consistency of noninvasive blood pressure monitoring techniques in horses are needed.
Cite This Article
APA
Yamaoka TT, Flaherty D, Pawson P, Scott M, Auckburally A.
(2017).
Comparison of arterial blood pressure measurements obtained invasively or oscillometrically using a Datex S/5 Compact monitor in anaesthetised adult horses.
Vet Anaesth Analg, 44(3), 492-501.
https://doi.org/10.1016/j.vaa.2016.05.008 Publication
Researcher Affiliations
- Institute of Biodiversity, Animal Health and Comparative Medicine, School of Veterinary Medicine, University of Glasgow, Glasgow, UK. Electronic address: Tyfane.Yamaoka@glasgow.ac.uk.
- Institute of Biodiversity, Animal Health and Comparative Medicine, School of Veterinary Medicine, University of Glasgow, Glasgow, UK.
- Institute of Biodiversity, Animal Health and Comparative Medicine, School of Veterinary Medicine, University of Glasgow, Glasgow, UK.
- School of Mathematics and Statistics, University of Glasgow, Glasgow, UK.
- Institute of Biodiversity, Animal Health and Comparative Medicine, School of Veterinary Medicine, University of Glasgow, Glasgow, UK.
MeSH Terms
- Anesthesia / methods
- Anesthesia / veterinary
- Animals
- Blood Pressure
- Blood Pressure Determination / methods
- Blood Pressure Determination / standards
- Blood Pressure Determination / veterinary
- Blood Pressure Monitors / standards
- Blood Pressure Monitors / veterinary
- Elective Surgical Procedures / veterinary
- Horses
- Oscillometry / veterinary
- Preanesthetic Medication / methods
- Preanesthetic Medication / veterinary
- Prospective Studies
Citations
This article has been cited 6 times.- Pratt S, Barnes TS, Cowling N, de Klerk K, Rainger J, Sole-Guitart A, Woldeyohannes S, Goodwin W. Bias Associated with Peripheral Non-Invasive Compared to Invasive Arterial Blood Pressure Monitoring in Healthy Anaesthetised and Standing Horses Using the Bionet BM7Vet.. Vet Sci 2022 Jan 28;9(2).
- Twele L, Neudeck S, Delarocque J, Verhaar N, Reiners J, Noll M, Tünsmeyer J, Kästner SBR. Agreement of High-Definition Oscillometry (HDO) and Invasive Blood Pressure Measurements at a Metatarsal Artery in Isoflurane-Anaesthetised Horses.. Animals (Basel) 2022 Feb 2;12(3).
- Radhakrishnan S, Lorenzutti AM, Araos JD, Martin-Flores M. Evaluation of noninvasive blood pressure in anesthetized horses: Bias, limits of agreement, and comparative detection of a predetermined mean blood pressure warranting treatment.. Can Vet J 2021 Sep;62(9):994-998.
- Straticò P, Carluccio A, Varasano V, Guerri G, Suriano R, Robbe D, Cerasoli I, Petrizzi L. Analgesic Effect of Butorphanol during Castration in Donkeys under Total Intravenous Anaesthesia.. Animals (Basel) 2021 Aug 9;11(8).
- Skelding A, Valverde A. Review of non-invasive blood pressure measurement in animals: Part 2 - Evaluation of the performance of non-invasive devices.. Can Vet J 2020 May;61(5):481-498.
- Boegli J, Schwarzwald CC, Mitchell KJ. Diagnostic value of noninvasive pulse pressure measurements in Warmblood horses with aortic regurgitation.. J Vet Intern Med 2019 May;33(3):1446-1455.
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