Comparison of two species-specific oscillometric blood pressure monitors with direct blood pressure measurement in anesthetized cats.
OBJECTIVE
To compare the performance of 2 species-specific oscillometric blood pressure (OBP) monitors (petMAPclassic and petMAPgraphic ) with direct blood pressure measurement in anesthetized cats.


DESIGN
Prospective, experimental study.


SETTING
Veterinary teaching hospital.


ANIMALS
Eight adult cats (3.2-5.5 kg).


INTERVENTIONS
During isoflurane anesthesia, OBP cuffs were placed on the thoracic limb and on the base of the tail while invasive blood pressure (IBP) was recorded from a dorsal pedal artery. End-tidal isoflurane concentrations, with or without intravenous dopamine (n = 8), norepinephrine (n = 1), or phenylephrine (n = 1) were adjusted to change invasive mean arterial pressure (MAP) between 40 to 100 mm Hg. Data were analyzed by the Bland-Altman method and 4-quadrant plots.


MEASUREMENTS AND MAIN RESULTS
Mean biases and limits of agreement (LOA: ± 1.96 SD) (mm Hg) recorded between the petMAPclassic (thoracic limb) and IBP for systolic arterial pressure (SAP), diastolic arterial pressure (DAP), and MAP were 4.2 ± 28.5, -6.1 ± 13.2, and -1.9 ± 14.6, respectively; mean biases and LOA (mm Hg) recorded with the tail cuff were 7.2 ± 31.3 (SAP), -6.1 ± 11.6 (DAP), and -1.1 ± 11.7 (MAP). Mean biases and LOA (mm Hg) between petMAPgraphic (thoracic limb) and IBP were 7.7 ± 27.0 (SAP), -4.3 ± 11.5 (DAP), 0.2 ± 13.0 (MAP); values recorded with the tail cuff were 10.9 ± 29.6 (SAP), -4.4 ± 11.7 (DAP), and -0.1 ± 12.1 (MAP). Concordance rates after excluding arterial pressure changes ≤ 5 mm Hg was ≥ 93% for both devices.


CONCLUSIONS
Although both OBP monitors provide unacceptable SAP estimations, MAP values derived from both monitors and DAP measured by the petMAPgraphic result in acceptable agreement with the reference method according to the Association for the Advancement of Medical Instrumentation (mean bias ≤ 5 mm Hg with LOA ≤ ± 16 mm Hg). Both monitors provide acceptable trending ability for SAP, DAP, and MAP.
['Cerejo|Sofia A|SA|', 'Teixeira-Neto|Francisco J|FJ|', 'Garofalo|Natache A|NA|', 'Rodrigues|Jéssica C|JC|', 'Celeita-Rodríguez|Nathalia|N|', 'Lagos-Carvajal|Angie P|AP|']
D000768:Anesthesia, General D000818:Animals D001794:Blood Pressure D001795:Blood Pressure Determination D015924:Blood Pressure Monitors D002415:Cats D005260:Female D008297:Male D009991:Oscillometry D011446:Prospective Studies D013045:Species Specificity
blood pressure anesthesia feline noninvasive pressure