Effects of cuff size and position on the agreement between arterial blood pressure measured by Doppler ultrasound and through a dorsal pedal artery catheter in anesthetized cats

Cuff size, cuff placement, blood pressure state, and monitoring technique can influence indirect arterial blood pressure monitoring in anesthetized bats (Pteropus vampyrus)

“…This is especially important in animals, such as chiropterans, with a heart rate above 180 beats/minute that would require a system resonance frequency of > 24 Hz to prevent underestimation of the SAP invasive , although the MAP invasive and DAP invasive would likely be unaffected. 30,41 Therefore, it is possible that the SAP invasive was underestimated in this study.…”

“…25,27 There are several conflicting studies in veterinary patients demonstrating the effect of cuff location on the accuracy of noninvasive devices to estimate IBP. 17,[28][29][30] Cuff location can influence the agreement between NIBP and IBP when comparing the same cuff size due to alterations in cuff width-to-limb circumference ratios between different locations and variations in anatomy, precluding uniform occlusion of underlying arterial structures during cuff inflation. 4,30 The bony and soft tissue structures of the pectoral limb are embedded in the patagium, making the pectoral limb less cylindrical than the pelvic limb.…”

“…17,[28][29][30] Cuff location can influence the agreement between NIBP and IBP when comparing the same cuff size due to alterations in cuff width-to-limb circumference ratios between different locations and variations in anatomy, precluding uniform occlusion of underlying arterial structures during cuff inflation. 4,30 The bony and soft tissue structures of the pectoral limb are embedded in the patagium, making the pectoral limb less cylindrical than the pelvic limb. 11,31 In this species of bat, the pectoral limb circumference was significantly greater due to the presence of the patagium, resulting in a lower cuff width-to-limb circumference ratio for each cuff size in the pectoral limb compared with the pelvic limb.…”

“…This is within the recommended range of 0.4 to 0.6, but slightly higher than reported in other exotic and domesticated mammalian species to maximize agreement between invasive pressures and pressures obtained non-invasively. 25,30,39 Several steps were taken to ensure that reference values remained accurate throughout the data collection process, specifically to avoid underestimation of SAP invasive that can occur from over-damping. Previous studies in microchiropterans reported overdamping of arterial waveforms, although details regarding the IBP measurement system including the size of the catheter were not described.…”

‘The Mercury Challenge’: feline systolic blood pressure in primary care practice – a European survey

“…However, measured BP can be affected by many different variables, including the type of equipment and how it is used (site used, technique employed, position of the cat, size of the cuff, etc), personnel involved, level of arousal of the cat and experience of the operator. 20 – 43 These factors, together with the inherent inter- and intra-variability of BP, 44 can make interpretation of individual BP measurements challenging. Despite these difficulties, consensus guidelines have emerged on how to measure and interpret SBP in cats, 17 , 18 although SBP values should not be interpreted independently from other clinical information.…”