Equivalence between invasive and oscillometric blood pressures at different anatomic locations in healthy normotensive anaesthetised horses.
Abstract: Accurate blood pressure measurement is essential for effective clinical assessment and appropriate interventions in anaesthetised horses. Information on the accuracy of oscillometry for blood pressure measurement on the appendages of mature horses is limited. Objective: To assess equivalence between invasive and oscillometric blood pressures at different anatomic locations in horses. Methods: Prospective experimental study using 6 healthy mature horses. Methods: Blood pressure was measured invasively in the right transverse facial artery and noninvasively by oscillometry in nondependent limbs and tail of laterally recumbent sevoflurane- or desflurane-anaesthetised horses. Cuff widths of 5-12 cm were tested on the tail, metatarsus, metacarpus and distal radius/ulna. Equivalence between mean arterial pressure (MAP) oscillometric and MAP invasive was assessed using a linear mixed effects model with a significance level of P≤0.05. Results: Twenty paired measurements were obtained for each cuff size in each of the locations, totalling 340 measurements. There was only one location (tail) and one cuff width (6 cm; cuff width-to-tail circumference ratio of 0.25) that resulted in equivalence between MAP measured with the oscillometric and the invasive methods (P = 0.8). All other locations (metacarpus, radius/ulna, metatarsus) and cuff widths were not equivalent (P≤0.01). Conclusions: A cuff width-to-tail circumference ratio of 0.25 is recommended for accurate oscillometric blood pressure measurement in mature, laterally recumbent anaesthetised normotensive horses. Studies with variable haemodynamics are warranted. Oscillometric measurements at other extremities and/or with other cuff sizes cannot be recommended for clinical use.
© 2015 EVJ Ltd.
Publication Date: 2015-05-23 PubMed ID: 25790220DOI: 10.1111/evj.12443Google Scholar: Lookup
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- Journal Article
- Anesthesia
- Blood
- Clinical Examination
- Clinical Findings
- Clinical Pathology
- Clinical Study
- Diagnosis
- Diagnostic Technique
- Disease Diagnosis
- Disease Treatment
- Equine Diseases
- Equine Health
- Equine Medicine
- Hemodynamics
- Horses
- Noninvasive Procedures
- Veterinary Care
- Veterinary Medicine
- Veterinary Practice
- Veterinary Procedure
- Veterinary Research
Summary
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This research investigates the precision of oscillometry, a non-invasive method for measuring blood pressure, compared to the traditional invasive method in anesthetized horses. The study stipulates that a cuff width-to-tail circumference ratio of 0.25 is ideal for accurate measurements, while other areas and cuff sizes are not advised for clinical use.
Methods
- The researchers conducted a prospective experimental study using 6 healthy mature horses as subjects.
- Blood pressure was measured invasively in the right transverse facial artery of each horse.
- Oscillometric blood pressure measurements were taken from nondependent limbs and tail of the horses while they were lying on their side, anesthetized either with sevoflurane or desflurane.
- Different cuff widths ranging from 5 centimeters to 12 centimeters were tested on the tail, metatarsus (part of the rear limb), metacarpus (part of the front limb), and distal radius/ulna (lower front leg).
Results
- A total of 340 measurements were obtained, with 20 paired measurements for each cuff size in each location.
- Equivalence between the Mean Arterial Pressure (MAP) taken using oscillometric methods and invasive methods was analyzed using statistical methods.
- The study found that only one location (tail) and cuff width (6 cm) had equivalent results between the two methods of measuring blood pressure. The cuff-width to tail-circumference ratio in this case was 0.25.
- All other locations (metacarpus, radius/ulna, and metatarsus) and cuff widths did not yield equivalent results between the two methods.
Conclusions
- This study provides evidence that a cuff width-to-tail circumference ratio of 0.25 is ideal for accurate oscillometric blood pressure measurements in healthy, anesthetized horses that are lying on their side.
- Further studies are needed on horses with variable haemodynamics to confirm these findings.
- Using different cuff sizes and/or measuring blood pressure from other extremities is not advised for clinical use.
Cite This Article
APA
Tearney CC, Guedes AG, Brosnan RJ.
(2015).
Equivalence between invasive and oscillometric blood pressures at different anatomic locations in healthy normotensive anaesthetised horses.
Equine Vet J, 48(3), 357-361.
https://doi.org/10.1111/evj.12443 Publication
Researcher Affiliations
- Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California Davis, Davis, USA.
- Department of Surgical and Radiological Sciences, University of California Davis, Davis, USA.
- Department of Surgical and Radiological Sciences, University of California Davis, Davis, USA.
MeSH Terms
- Anesthesia, General / veterinary
- Animals
- Blood Pressure / physiology
- Blood Pressure Determination / veterinary
- Blood Pressure Monitors / veterinary
- Female
- Horses / physiology
- Male
- Monitoring, Physiologic / instrumentation
- Monitoring, Physiologic / methods
- Oscillometry / instrumentation
- Oscillometry / veterinary
Citations
This article has been cited 5 times.- 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.
- 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.
- 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.
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