Concordância entre oscilometria de alta definição e Doppler ultrassônico na mensuração da pressão arterial em gatos

Abstract

Blood pressure (BP) measurement is a very important practice in veterinary routine, whether in the medical clinic, for patient evaluation, to check diseases that may be related to blood pressure disorders, in preoperative appointments, in intensive care units for monitoring critically ill patients, as well as in operating rooms for transoperative and transanesthetic monitoring.There are some methods to measure BP, which are invasive methods, such as arterial catheterization, considered as the gold standard, and non-invasive methods, like ultrasonic Doppler (UD) and high-definition oscillometric (HDO). Non-invasive methods are preferably used in the clinical routine, for they are more accessible and practical, in addition to not offering the risk of complications when compared to direct measurement. In order to correctly perform blood pressure measurement, it is important to pay attention to the adequate size of the cuff as well as the correct position of it on the limb which the measurement will be performed, at the level of the right atrium. It should also be noted that the patient is under as little stress as possible, to make sure there are no artifacts during the estimation of blood pressure. In this research, a comparison was presented between two indirect measurement methods, high-definition oscillometry and ultrasonic Doppler, for the measurement of blood pressure in cats. The experiment took place at the Veterinary Hospital of the Federal University of Uberlândia, and included the BP measurement of 20 feline patients in the surgical routine of the Small Animal Sterilization by Surgical Method Program, using high-definition oscillometry and ultrasonic Doppler. The goal was to verify the accuracy of the results estimated by the high-definition oscillometric provided by InPulse Animal Health, in comparison with the results presented by the ultrasonic Doppler. It was noted that the HDO has a good agreement with the DU when it comes to measurement of systolic blood pressure (SBP) in normotensive awake cats. On the other hand, the agreement between HDO and DU for SBP measurements in hypotensive awake cats was not adequate.