Taking blood pressure is important in cats when hypertension is suspected. We use the Parks's Doppler unit which is the most accurate doppler for cats. The Doppler method uses a piezoelectric crystal (within the probe) that emits ultrasound waves to detect an arterial pulse. Once the pulse has been detected an inflatable cuff (sphygmomanometer) is inflated proximal to the probe to occlude the artery (Figure 1). This cuff is gradually deflated and the pressure in the cuff during this period is monitored. The pressure to which the cuff is deflated when the pulse is first detected again represents systolic blood pressure.