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A study of measurement of noninvasive blood pressure with the oscillometric device, sentinel,in isoflurane-anaesthetized horses


Hatz, Lea-Annina; Hartnack, S; Kümmerle, J M; Hässig, M; Bettschart-Wolfensberger, R (2015). A study of measurement of noninvasive blood pressure with the oscillometric device, sentinel,in isoflurane-anaesthetized horses. Veterinary Anaesthesia and Analgesia, 42(4):369-376.

Abstract

Objective: To assess accuracy of noninvasive blood pressure (NIBP) measured by oscillometric device Sentinel compared to invasive blood pressure (IBP) in anaesthetized horses undergoing surgery. To assess if differences between the NIBP measured by the Sentinel and IBP are associated with recumbency, cuff placement, weight of the horse or acepromazine premedication and to describe usefulness of the Sentinel.
Study design: Prospective study examining replicates of simultaneous NIBP and IBP measurements.
Animals: Twenty-nine horses.
Methods: Invasive blood pressure was measured via a catheter in the facial artery, transverse facial artery or metatarsal artery. NIBP was measured using appropriate size cuffs placed on one of two metacarpal or metatarsal bones or the tail in random order. With both techniques systolic (SAP), mean (MAP), and diastolic (DAP) arterial blood pressures and heart rates (HR) were recorded. A mixed effects model compared the IBP to the NIBP values and assessed potential effects of catheter placement, localisation of the cuffs in combination with recumbency, weight of the horse or acepromazine premedication.
Results: Noninvasive blood pressure yielded higher measurements than IBP. Agreement varied with recumbency and cuff position. Estimated mean differences between the two methods decreased from SAP (lateral recumbency: range −5.3 to −56.0 mmHg; dorsal recumbency: range 0.8 to −20.7 mmHg), to MAP (lateral recumbency: range −1.8 to −19.0 mmHg; dorsal recumbency: range 13.9 to −16.4 mmHg) to DAP (lateral recumbency: range 0.5 to −6.6 mmHg; dorsal recumbency: range 21.0 to −15.5 mmHg). NIBP measurement was approximately two times more variable than IBP measurement. No significant difference between IBP and NIBP due to horse's weight or acepromazine premedication was found. In 227 of 1047 (21.7%) measurements the Sentinel did not deliver a result.
Conclusion and clinical relevance: According to the high variability of NIBP compared to IBP, NIBP measurements as measured by the Sentinel in the manner described here are not considered as an appropriate alternative to IBP to measure blood pressure in anaesthetized horses.

Abstract

Objective: To assess accuracy of noninvasive blood pressure (NIBP) measured by oscillometric device Sentinel compared to invasive blood pressure (IBP) in anaesthetized horses undergoing surgery. To assess if differences between the NIBP measured by the Sentinel and IBP are associated with recumbency, cuff placement, weight of the horse or acepromazine premedication and to describe usefulness of the Sentinel.
Study design: Prospective study examining replicates of simultaneous NIBP and IBP measurements.
Animals: Twenty-nine horses.
Methods: Invasive blood pressure was measured via a catheter in the facial artery, transverse facial artery or metatarsal artery. NIBP was measured using appropriate size cuffs placed on one of two metacarpal or metatarsal bones or the tail in random order. With both techniques systolic (SAP), mean (MAP), and diastolic (DAP) arterial blood pressures and heart rates (HR) were recorded. A mixed effects model compared the IBP to the NIBP values and assessed potential effects of catheter placement, localisation of the cuffs in combination with recumbency, weight of the horse or acepromazine premedication.
Results: Noninvasive blood pressure yielded higher measurements than IBP. Agreement varied with recumbency and cuff position. Estimated mean differences between the two methods decreased from SAP (lateral recumbency: range −5.3 to −56.0 mmHg; dorsal recumbency: range 0.8 to −20.7 mmHg), to MAP (lateral recumbency: range −1.8 to −19.0 mmHg; dorsal recumbency: range 13.9 to −16.4 mmHg) to DAP (lateral recumbency: range 0.5 to −6.6 mmHg; dorsal recumbency: range 21.0 to −15.5 mmHg). NIBP measurement was approximately two times more variable than IBP measurement. No significant difference between IBP and NIBP due to horse's weight or acepromazine premedication was found. In 227 of 1047 (21.7%) measurements the Sentinel did not deliver a result.
Conclusion and clinical relevance: According to the high variability of NIBP compared to IBP, NIBP measurements as measured by the Sentinel in the manner described here are not considered as an appropriate alternative to IBP to measure blood pressure in anaesthetized horses.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:05 Vetsuisse Faculty > Veterinary Clinic > Equine Department
05 Vetsuisse Faculty > Veterinary Clinic > Department of Farm Animals
05 Vetsuisse Faculty > Chair in Veterinary Epidemiology
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Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
630 Agriculture
Language:English
Date:2015
Deposited On:07 Jan 2015 10:16
Last Modified:01 Jun 2017 02:19
Publisher:Wiley-Blackwell Publishing, Inc.
ISSN:1467-2987
Publisher DOI:https://doi.org/10.1111/vaa.12213

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