Investigation of the agreement of a continuous non-invasive arterial pressure device in comparison with invasive radial artery measurement

Abstract

The CNAP monitor showed an acceptable agreement and was interchangeable with invasive pressure monitoring for MAP during normotensive conditions. During induction of anaesthesia and when the AP was low, the agreement was less good and interchangeability was not achieved. These results suggest that CNAP is not statistically equivalent to invasive monitoring during all periods of anaesthesia but may be a useful additional AP monitor.

Accuracy of Continuous Noninvasive Arterial Pressure Monitoring in Living-Liver Donors During Transplantation

“…Ilies and associates revealed no findings regarding the adverse events of CNAP, but long-term use may be associated with vascular occlusion, ischemia, and pain. 12 We did not observe such complications in our patients. After CNAP was placed on the patient's arm, when movement of the sensors occurred, we observed that intrasensor pressure changes were directly reflected on the pressure traces on the monitor.…”

“…Several previous reports emphasized that > 20% hypotensive episodes during surgery were missed and another 20% were detected with a delay by NIBP. 12 These findings indicate that closer monitoring should be done, especially in critically ill or high risk patients. 3,12 Existence of important complications of arterial catheters has led to a search for devices that can make noninvasive and continuous measurement of blood pressure possible.…”

“…12 These findings indicate that closer monitoring should be done, especially in critically ill or high risk patients. 3,12 Existence of important complications of arterial catheters has led to a search for devices that can make noninvasive and continuous measurement of blood pressure possible. 1,3 The basic principle of these devices is the vascular unloading technique introduced first by Penáz and coworkers in 1973.…”

“…16 Ilies and associates showed in another study that measurements obtained by CNAP at different stages of anesthesia were unreliable. 12 In our study, CNAP was used in living donors during liver transplant for liver transplant. After anesthesia induction and patient stabilization, CNAP was properly placed and measurements were obtained.…”

Closed‐loop double‐vasopressor automated system to treat hypotension during spinal anaesthesia for caesarean section: a preliminary study

“…A continous non-invasive BP monitoring system (CNAP TM ; Draeger Medical, Lubeck, Germany) with a closed-loop feedback to control vasopressor administration would address these issues. The CNAP system was found in recent studies to be superior to intermittent oscillometric measurements in detecting both rapid BP changes and intra-operative hypotension during spinal anaesthesia for caesarean section [5], and its accuracy and precision have been compared favourably with invasive intra-arterial BP monitoring [6,7]. Herein, we describe the use of a closed-loop, doublevasopressor, automated system that integrates beat-tobeat systolic BP data from a CNAP device using a customised algorithm that controls two infusion pumps, with phenylephrine and ephedrine administered according to the algorithm.…”