Monitoring blood pressure in cats is a critical component of modern veterinary care. Hypertension is common in older cats and those with chronic kidney disease, hyperthyroidism, diabetes, or cardiac conditions, yet it often presents with subtle or non-specific clinical signs. Accurate, repeatable blood pressure measurement allows veterinary teams to detect disease earlier, monitor progression, and assess treatment efficacy.
For veterinary nurses, understanding how to take a cat’s blood pressure correctly and how to minimise stress-related inaccuracies is essential. This guide provides a clear, practical overview of feline blood pressure measurement, with step-by-step instructions using two widely used veterinary systems: the AutoCAT+ Automatic Blood Pressure Monitor and the CAT+ Doppler, both available from Thames Medical.
Feline hypertension is frequently underdiagnosed because cats often mask early symptoms. When left untreated, sustained high blood pressure can result in severe and irreversible damage, including retinal detachment, neurological changes, renal deterioration, and cardiac strain.
Routine blood pressure measurement is particularly important for:
Accurate readings rely not only on good equipment, but also on appropriate technique and patient handling—areas where veterinary nurses play a central role.
Before applying any monitoring device, preparation is essential to reduce stress and avoid artificially elevated readings.
The cat should be allowed time to acclimatise to the room, ideally in a quiet, low-traffic environment. Handling should be calm and minimal, with the cat positioned comfortably in sternal or lateral recumbency, or sitting naturally if preferred. Consistency is key, using the same limb or tail location at each visit improves reliability over time.
Correct cuff sizing is also critical. The cuff width should measure approximately 30-40% of the circumference of the limb or tail. An incorrectly sized cuff is one of the most common causes of inaccurate blood pressure readings in cats.
The AutoCAT+ Automatic Cat Blood Pressure Monitor is an oscillometric blood pressure system designed specifically for veterinary use. It offers automated readings and is well-suited for busy clinical environments where speed and consistency are priorities.
Begin by selecting the appropriate cuff size and placing it snugly around the cat’s forelimb, hindlimb, or tail base. The cuff should be secure but not tight, with the artery positioned correctly beneath the cuff artery marker.
Ensure the blood pressure tubing is firmly inserted into the AutoCAT+ port, then connect the cuff to the luer end of the tubing. Once connected, make sure the cat is calm, still, and comfortably positioned. Activate the AutoCAT+ unit with a press of the button, allowing the device to control cuff inflation and deflation for that measurement.
To obtain additional readings, the button should be pressed again once the previous measurement cycle has completed. Each blood pressure reading is initiated individually rather than running continuously. When used in conjunction with the AutoCAT+ companion app, automated measurement sequences can also be configured if required.
To improve accuracy, multiple readings should be taken during the same session. Discard the first reading and average the subsequent consistent values. When averaging results, patient position, cuff placement, and measurement site should remain consistent throughout, as even small changes in limb or tail position can influence readings. This approach helps minimise situational stress effects, often referred to as “white coat hypertension.”
The AutoCAT+ is valued for its ease of use and minimal operator dependency. Because the process is automated, it reduces variability between staff members and allows nurses to perform blood pressure assessments confidently with minimal training. It is particularly useful for routine screening clinics and inpatient monitoring.
The CAT+ Doppler blood pressure system is widely used in veterinary practice for feline patients, particularly those with low pulse pressure or where oscillometric readings may be inconsistent. When used with good technique and appropriate patient preparation, Doppler offers excellent sensitivity and repeatability for systolic and sometimes diastolic blood pressure measurement.
Begin by creating a calm environment and allowing the cat time to settle. Gentle handling and minimal restraint are essential, as stress is one of the most significant causes of artificially elevated readings. The limb or tail selected for measurement should be positioned at heart level and supported comfortably.
Select an appropriately sized cuff, ensuring the inflatable width is approximately 30–40% of the limb or tail circumference. Place the cuff snugly around the forelimb, hindlimb, or tail, aligning the cuff artery marker with the patient’s pulse. Incorrect cuff sizing is a common cause of inaccurate readings.
Prepare the measurement site by lightly wetting the fur with warm soapy water to improve probe contact, avoiding clipping where possible. Apply a generous layer of ultrasound gel to both the skin and the Doppler probe face. Good gel contact plays a critical role in signal clarity.
Position the probe distal to the cuff over the palmar or plantar artery, or at the base of the tail. Hold the probe lightly and make small, controlled adjustments until a clear, consistent arterial signal is audible. Excessive pressure or large movements can dampen or obscure the signal.
Once a stable signal is established, inflate the cuff slowly until the sound disappears, then continue inflation by a further 10–20 mmHg to ensure full arterial occlusion. Gradually deflate the cuff at a steady rate. The pressure at which the arterial sound first returns corresponds to the systolic blood pressure.
Multiple readings should be taken during each session. The first measurement should be discarded, with three to five subsequent readings averaged. For meaningful comparison, cuff size, measurement site, limb position, and patient posture should remain consistent, as changes in any of these can influence results.
Systolic pressure remains the most reliable and clinically relevant value obtained using Doppler techniques. With experience, some users may notice subtle changes in the Doppler sound during deflation that can suggest diastolic pressure, but this is more variable and should be interpreted with caution.
The CAT+ Doppler provides excellent sensitivity for feline patients, particularly those with weak pulses or hypotension. While it is more operator-dependent than automatic systems, many veterinary nurses prefer Doppler for its reliability and clinical accuracy when used correctly.
Cats are highly sensitive to their environment, and stress is the most significant factor affecting blood pressure readings. Vocalisation, struggling, or restraint can lead to falsely elevated results.
Other common challenges include inconsistent cuff placement, poor probe positioning when using Doppler, and taking too few readings to establish a reliable average. Training, repetition, and consistency are essential to overcome these issues.
Achieving reliable feline blood pressure readings is as much about technique as it is about equipment. Consistency in positioning, cuff size, and measurement location allows for meaningful comparison over time. Gentle handling, patience, and allowing the cat to settle before starting will significantly improve accuracy.
Recording contextual details, such as patient demeanour, body position, and measurement site can also help clinicians interpret results more effectively, particularly when monitoring long-term trends.
Both the AutoCAT+ Automatic Blood Pressure Monitor and the CAT+ Doppler have clear roles within feline practice. Automated systems offer speed and ease, making them ideal for routine screening and busy clinics. Doppler systems provide exceptional sensitivity and are often preferred for challenging or high-risk feline patients.
Many practices choose to use both, allowing veterinary nurses to select the most appropriate tool based on the individual cat and clinical scenario.
Reliable blood pressure monitoring starts with clinically proven equipment. Thames Medical supplies both the AutoCAT+ Automatic Blood Pressure Monitor and the CAT+ Doppler, supporting veterinary teams with high-quality devices designed specifically for feline patients.
Whether you are looking to streamline routine screenings or enhance diagnostic accuracy for complex cases, Thames Medical can help you choose the right solution for your practice.
Explore the AutoCAT+ and CAT+ Doppler today and equip your clinic with trusted feline blood pressure monitoring systems from Thames Medical, or if you’d like tailored advice on whether it’s the right fit for your clinic, you’re welcome to get in touch with the Thames Medical team for more information.
