Continuous neonatal blood gas monitoring using a multiparameter intra-arterial sensor

Aims-To compare arterial blood gas (ABG) readings obtained with a multipara meter intra-arterial sensor with those from an ABG analyser. Methods-An MPIAS with the ability to measure continuously pH, PaCO2, and Pa O2 was introduced via an umbilical arterial catheter in 27 neonates requiri ng intensive care. They underwent 3260 hours of MPIAS monitoring, during wh ich 753 ABG readings were performed. Results-Overall bias (mean difference: MPIAS-ABG) and precision (standard d eviation of differences) values were: -0.002 and 0.022, respectively, for p H; +0.26 and 0.52 for PaCO2 (kPa); and -0.19 and 0.99 for PaO2 (kPa). This gave 95% limits of agreement as: -0.047 to +0.042 for pH, -0.76 to +1.28 kP a for PaCO2, and -2.13 to +1.75 kPa for PaO2. For each variable, precision across readings from the same individual was better than overall precision for all data. No complications related to the use of the catheter were obse rved. Conclusions-Continuous MPIAS ABG monitoring is an exciting development, wit h the potential to reduce blood transfusions and improve ABG homeostasis.