A novel method (CiMON) for continuous intra-abdominal pressure monitoring: Pilot test in a pig model

Abstract

Background. Intravesical pressure (IAP ivp) measurement is considered to be the gold standard for assessment of intra-abdominal pressure (IAP). This study evaluated a new minimally invasive IAP monitoring device (CiMON) against three other devices in a wide range of clinically relevant IAP and in different body positions in healthy pigs. Methods. The CiMON catheter (IAP CiM) and another balloon-tipped catheter (IAP spie) were positioned into the stomach. Fluid-filled catheters were used for direct intraperitoneal (IAP dir) and IAP ivp measurement. Both in supine and 25 ° head-of-bed positions, IAP was increased from baseline to 30 mmHg. At every IAP level, 4 IAP measurements were recorded simultaneously. Mean differences and the limits of agreement were calculated. Results. Bias between IAP CiM and IAP spie was nearly zero with very good agreement, both in supine and 25 ° position. In supine position, IAP CiM slightly overestimated IAP ivp and IAP dir by 1.5 and 2.1 mmHg with reasonable agreement. In 25 ° position, IAP CiM underestimated IAP ivp and IAP dir by 1.0 and 0.5 mmHg, again with reasonable agreement. Conclusions. Agreement between IAP CiM and IAP spie was very good, while good-to-moderate agreement exists between IAP CiM and IAP dir or IAP ivp. Simplicity, continuous monitoring, and the combination with a feeding tube should lead to further clinical studies, evaluating this new CiMON device. © 2012 Joost Wauters et al.