Accuracy of indirect measurement of blood pressure in neonatal foals.
Abstract: The objectives of this study were to assess, in anesthetized neonatal foals, the accuracy of 2 automated indirect oscillometric monitors for measurement of mean arterial pressure (MAP), to determine the optimal site of cuff placement for MAP monitoring, and to determine the relationship between arterial blood pressure and cardiac output. Ten neonatal foals were anesthetized and instrumented with a catheter in the metatarsal artery for direct MAP monitoring and measurement of cardiac output by lithium dilution. Concurrent MAP measurements were obtained with Cardell and Dinamap oscillometric monitors with cuffs placed at 3 different sites (coccygeal, metatarsal, and median arteries). Blood pressure was manipulated by varying the depth of anesthesia and by administration of dobutamine or phenylephrine. A statistically significant (P = .025) interaction was found between the type of monitor and cuff placement site. With the Cardell monitor, placement of the cuff over the coccygeal artery resulted in a significantly lower bias than placement over the median or dorsal metatarsal artery (P < .0001 and P = .0149, respectively). No significant difference in bias was found with cuff placement site when using the Dinamap monitor. The correlation coefficient (r) between MAP and cardiac output was 0.47. Indirect oscillometry with a cuff placed over the coccygeal artery or dorsal metatarsal artery is an acceptable method for measuring MAP in foals. Blood pressure does not correlate well with cardiac output in anesthetized foals.
Publication Date: 2005-08-13 PubMed ID: 16095176
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- Evaluation Study
- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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The researchers investigated the accuracy of two automated indirect oscillometric monitors used to measure mean arterial pressure (MAP) in anesthetized neonatal foals. They found that the type of monitor and the location where the cuff was placed significantly influenced the accuracy of the measurements. Further, the study revealed that blood pressure was not a good predictor of cardiac output in anesthetized foals.
Study Design and Procedure
- The study involved 10 neonatal foals that were anesthetized and fitted with a catheter in the metatarsal artery. This setup was done in order to facilitate direct MAP monitoring and assessment of cardiac output using lithium dilution.
- Concurrent MAP measurements were conducted using Cardell and Dinamap oscillometric monitors. These monitors were fitted with cuffs that were positioned at three different body sites (coccygeal, metatarsal, and median arteries).
- Manipulation of blood pressure was achieved by altering the depth of anesthesia in the foals and administrating dobutamine or phenylephrine.
Findings
- The results showed that the accuracy of the indirect MAP measurements greatly depended on the type of machine used and where the cuff was applied. The Cardell monitor yielded significantly lower bias when the cuff was placed over the coccygeal artery compared to placement over the median or dorsal metatarsal artery.
- No considerable difference in bias was found when cuff placement was varied with the Dinamap monitor.
- The correlation between MAP and cardiac output was found to be 0.47, indicating a weak correlation.
Conclusion
- The research found that the use of indirect oscillometry with a cuff positioned over the coccygeal artery or dorsal metatarsal artery is a satisfactory method for the determination of MAP in foals.
- However, they also concluded that blood pressure measurements are not a well-suited indicator of cardiac output in anesthetized foals.
Cite This Article
APA
Giguère S, Knowles HA, Valverde A, Bucki E, Young L.
(2005).
Accuracy of indirect measurement of blood pressure in neonatal foals.
J Vet Intern Med, 19(4), 571-576.
Publication
Researcher Affiliations
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine University of Florida, Gainesville, FL 32610, USA. gigueres@mail.vetmed.ufl.edu
MeSH Terms
- Animals
- Animals, Newborn / physiology
- Blood Pressure / physiology
- Blood Pressure Determination / veterinary
- Blood Pressure Monitors / veterinary
- Female
- Horses / physiology
- Male
- Oscillometry
- Reproducibility of Results
Citations
This article has been cited 10 times.- Freccero F, Di Maio C, Mariella J, Lanci A, Castagnetti C, Hallowell G. Assessment of the microvascular perfusion using sidestream dark-field imaging in healthy newborn foals. Vet Med Sci 2023 Jan;9(1):158-166.
- 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).
- 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.
- Skelding A, Valverde A. Non-invasive blood pressure measurement in animals: Part 1 - Techniques for measurement and validation of non-invasive devices. Can Vet J 2020 Apr;61(4):368-374.
- Chinn GA, Pearn ML, Vutskits L, Mintz CD, Loepke AW, Lee JJ, Chen J, Bosnjak ZJ, Brambrink AM, Jevtovic-Todorovic V, Sun LS, Sall JW. Standards for preclinical research and publications in developmental anaesthetic neurotoxicity: expert opinion statement from the SmartTots preclinical working group. Br J Anaesth 2020 May;124(5):585-593.
- 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.
- Heliczer N, Lorello O, Casoni D, Navas de Solis C. Accuracy and Precision of Noninvasive Blood Pressure in Normo-, Hyper-, and Hypotensive Standing and Anesthetized Adult Horses. J Vet Intern Med 2016 May;30(3):866-72.
- Valverde A, Gianotti G, Rioja-Garcia E, Hathway A. Effects of high-volume, rapid-fluid therapy on cardiovascular function and hematological values during isoflurane-induced hypotension in healthy dogs. Can J Vet Res 2012 Apr;76(2):99-108.
- MacFarlane PD, Grint N, Dugdale A. Comparison of invasive and non-invasive blood pressure monitoring during clinical anaesthesia in dogs. Vet Res Commun 2010 Mar;34(3):217-27.
- Mendoza FJ, Buzon-Cuevas A, Aguilera-Aguilera R, Gonzalez-De Cara CA, De Las Heras A, Perez-Ecija A. Hemodynamic Response to Lipopolysaccharide Infusion and Effect of Meloxicam Administration on Cardiac Function in Donkeys. Animals (Basel) 2024 Dec 18;14(24).
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