Comparison of non-invasive and invasive blood pressure measurements in horses during anaesthesia using the&#x0D;oscillometric blood pressure monitor S/5 Datex Ohmeda

Fouché, Nathalie Elisa; Auer, Ulrike; Iff, Isabelle

doi:10.21836/pem20160509

Cited by 2 publications

(5 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The inferior precision estimates for NIBP measured at the metacarpus compared with the tail in anaesthetised horses, may reflect greater limb manipulation during surgery or poorer cuff contact. The proximal tail base has historically been used for NIBP studies in horses [6][7][8][9][10][11][12][13][14], and is for its even contouring, limited compression during recumbency and limited manipulation during surgery. Despite returning accurate under-estimates of ABP, NIBP measured at the metacarpus was significantly imprecise (SD > 22 mm Hg).…”

Section: Discussionmentioning

confidence: 99%

“…Its impact on the detection of peripheral pulse flow using the non-invasive method is unconfirmed [8] and is difficult to predict, given alpha-2 agents are biphasic in their haemodynamic effects. Previous reports of NIBP failure rates in anaesthetised horses vary between monitors [7,8] and, between pharmacologically altered ABP states (hypotension, normotension and hypertension) [11].…”

Section: Discussionmentioning

confidence: 99%

“…It is also possible that these excluded measurements may have underestimated or overestimated ABP to a larger degree than those which met the inclusion criteria; meaning the bias estimates may also be underestimates of their true value. Unfortunately, there is a lack of standardised exclusion (or inclusion) criteria used in IBP-NIBP comparative studies [6,7,9], and this complicates how clinicians interpret these studies.…”

Section: Discussionmentioning

confidence: 99%

“…Arterial blood pressure state classification in anaesthetised horses was extrapolated from previous studies [6,7,9,11,15,16] and can be found in Table 1. These horses were aged 175 ± 40 months and weighed 505 ± 37 kg.…”

Section: Arterial Blood Pressure Assessmentmentioning

confidence: 99%

“…The monitor measures MAP at maximal oscillation amplitude, then uses proprietary algorithms to calculate SAP and DAP. Veterinary specific oscillometric devices have been studied in conscious and anaesthetised adult horses [6][7][8][9][10][11][12] and foals [13,14] across variably defined hypotensive and hypertensive ABP states. Estimates for accuracy and reliability vary considerably in these studies, with the underestimation and overestimation of ABP by the non-invasive method reported.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Bias Associated with Peripheral Non-Invasive Compared to Invasive Arterial Blood Pressure Monitoring in Healthy Anaesthetised and Standing Horses Using the Bionet BM7Vet

Pratt

Barnes

Cowling

et al. 2022

Veterinary Sciences

View full text Add to dashboard Cite

To compare arterial blood pressure (ABP) measured invasively (IBP) to ABP measured non-invasively (NIBP) via oscillometry in healthy anaesthetised and standing horses using the Bionet BM7Vet. Fourteen horses were anaesthetised for elective procedures (anaesthetised group) and 10 horses were enrolled for standing blood pressure manipulation (standing group). In both groups, IBP and NIBP-corrected to heart level were measured every 3 min using the Bionet BM7Vet. The overall mean difference (bias), standard deviation and limits of agreement (LOA) were calculated for paired IBP and NIBP systolic (SAP), mean (MAP) and diastolic (DAP) blood pressure measurements. In anaesthetised horses, the NIBP cuff was placed at either the proximal tail base or the metacarpus. Invasive MAP was used to retrospectively characterise measurements into hypotensive (≤70 mm Hg), normotensive (71–110 mm Hg) or hypertensive (≥111 mm Hg) subgroups. In standing horses, the NIBP cuff was placed at the tail base only and invasive MAP was manipulated to achieve hypertension (≥126 mm Hg) and hypotension (≤90 mm Hg) using phenylephrine and acepromazine, respectively. When measuring NIBP at the tail in anaesthetised horses, the Bionet BM7Vet failed on 8/185 occasions and overestimated SAP, MAP and DAP during hypotension and normotension. The biases (lower, upper LOA) for MAP were −11.4 (−33.3, 10.5) and −6.0 (−25.8, 13.8) mm Hg, respectively. Hypertension could not be evaluated. When measuring NIBP at the metacarpus in anaesthetised horses, the Bionet BM7Vet failed on 24/65 occasions and underestimated SAP, MAP and DAP when all ABP subgroups were combined. The bias (lower, upper LOA) for pooled MAP was 3.6 (−44.3, 51.6) mm Hg. When measuring NIBP at the tail in standing horses, the Bionet BM7Vet failed on 64/268 occasions and underestimated SAP, MAP and DAP during hypotension, normotension and hypertension. The biases (lower, upper LOA) for MAP were 16.3 (−10.5, 43.1), 16.6 (−19.5, 52.7) and 30.0 (−8.1, 68.0) mm Hg, respectively. Monitoring NIBP on the Bionet BM7Vet in anaesthetised horses overestimated ABP at the tail and underestimated ABP at the metacarpus. The device inaccurately detected hypotension and should be used cautiously. In standing horses, the Bionet BM7Vet underestimated ABP at the tail, especially during pharmacologically induced hypertension.

show abstract