Concordância entre dispositivo oscilométrico de alta definição com método doppler ultrassônico para aferição de pressão arterial sistólica em cães

Abstract

The agreement between systolic arterial pressure (SAP) measured by Doppler ultrasonic (DU) and by high-definition oscillometric device (HDO) in normotensive, hypertensive and hypotensive dogs has not been evaluated. The aim of this study was to assesement limits of agreement (LoA) for SAP measured by DU and HDO in normotensive (90≤SAP≤160 mmHg), hypotensive (SAP<90mmHg) and hypertensive (SAP >160 mmHg) dogs. The prospective clinical study was perfomaced with sixty hospitalized awake dogs separed in three groups: normotensive (n=34), hypotensive (n=10) and hypertensive (n=16). Five consecutive SAP readings were obtained from each dog with DU and HDO. All measurements were obtained following the same protocol, which conformed to the American College of Veterinary Internal Medicine (ACVIM) guidelines. The correlation of SAP between the devices was moderate in normotensive (r =0,53. p<0.001) and hypertensive (r = 0.52. p<0.038), however was stronger in hypotensive (r =0,81. p<0.004) dogs. The SAP bias for the condition of normotension and hypotension was 1.00 ± 13.55 mmHg (LoA: -25.62 to 27.52) and -3.50 ± 7.61 mmHg (LoA: - 18.42 to 11.43 mmHg), respectively. There were no significant differences between SAP bias by DU and HDO in normotensive (P = 0.93) and hipotensive (P = 0.452). However, the HDO underestimated SAP (P = 0.004) compared with DU (bias: 27.18 ± 14.41 mmHg; LoA: -1.06 to 55.43 mmHg) in hypertensive dogs. In conclusion, the HDO resulted in SAP readings with good agreement for DU in both normotensive and hypotensive awake dogs. However, the agrément of SAP measured by DU and HDO is poor in hypertensive dogs.