Many veterinary practices do not routinely measure blood pressure and end tidal carbon dioxide during anaesthesia. My Local Vet measures both of these parameters as well as oxygenation, heart rate and rhythm, respiratory rate, body temperature and depth of anaesthesia. Monitoring blood pressure is really important because anaesthetic agents will often reduce blood pressure and this can adversely effect all organs, particularly the kidneys. If blood pressure readings fall below a certain level, we can combat this by increasing the rate of intravenous fluid administration or by reducing the depth of anaesthesia or both. If blood pressure is not monitored then how would the vet know if it is low? Measuring end tidal carbon dioxide is essential in gauging the blood carbon dioxide level and determining if the anaesthetised patient is taking deep enough breaths. Abnormally high carbon dioxide levels can adversely effect both the brain and the cardiovascular system!