Journal of AdvancedMedical and Dental Sciences Research

Background: During the perioperative period, arterial pressure (AP) should be monitored at frequent intervals or, under some circumstances, continuously. Intermittent monitoring is performed using an oscillometric pressure device and generally referred to as non-invasive AP (NIAP) monitoring. Hence; the present study was conducted for assessing continuous non-invasive arterial pressure monitoring during induction of general anaesthesia in patients undergoing cardiac surgery. Materials & methods: 50 Patients above the age of 20 years undergoing cardiac surgery were recruited. Complete demographic and clinical details of all the patients were recorded. The basic principle of the CNAP™ is that the blood volume in a suitable artery is measured and kept constant by applying corresponding external pressure (i.e., volume clamping). The CNAP™ monitoring system consists of reusable finger cuffs, the cuff controller, and the CNAP™ pod, which interfaces into the patient monitor. After 5 min of stabilisation, simultaneous measurements of IAP and CNAP were recorded every minute. Results: The systolic ABP by CNAP™ was consistently lower than systolic IAP, and the CNAP™ diastolic ABP was consistently higher than diastolic IAP, yielding a systolic bias of 6.13 mm Hg and a diastolic bias of − 3.84 mm Hg. CNAP™ MAP values were almost close to the IAP mean ABP value, yielding a bias of − 0.04 mm Hg. Conclusion: We recommend CNAP monitor for induction of GA in patients undergoing different types of cardiac surgeries.