Evaluation of an indirect oscillometric blood pressure monitor in anaesthetised dogs at three different anatomical locations

New Zealand Veterinary Journal
M FujiyamaM Gieseg

Abstract

To evaluate the agreement between invasive and non-invasive measurements of blood pressure (BP) using an oscillometer (PetTrust) at three different anatomical locations in anaesthetised dogs under different haemodynamic conditions. Eight adult Greyhounds weighing 23.5-36.5 kg were anaesthetised with isoflurane and positioned in dorsal recumbency. Systolic arterial pressure (SAP), diastolic arterial pressure (DAP) and mean arterial pressure (MAP) were measured invasively via a dorsal pedal artery and non-invasively using the oscillometer with cuffs placed above the carpus, above the tarsus and around the tail base. Phenylephrine was administered to induce vasoconstriction, dobutamine was used to increase cardiac output and increased end-tidal concentrations of isoflurane were used to induce vasodilation. Correlation between measurements was analysed by linear regression and agreement was analysed using Bland-Altman plots. Seventy two representative measurements were obtained. Mean differences (bias) between invasive and non-invasive measurements were <5 mmHg except for DAP measured on the tail, and SD (precision) were <15 mm Hg except for SAP measured at the pelvic limb. Correlation coefficients were >0.9 except for SAP on the p...Continue Reading

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