Experiences with continuous intra-arterial blood gas monitoring
Abstract
Management of critically ill patients requires frequent arterial blood gas analyses for assessing the pulmonary situation and adjusting ventilator settings and circulatory therapeutic measures. Continuous arterial blood gas analysis is a real-time monitoring tool, which reliably detects the onset of adverse pulmonary effects. It gives rapid confirmation of ventilator setting changes and resuscitation and helps to ensure precise adjustment of therapy. In this study a newly available fiber optic sensor system has been employed for continuous intraarterial blood gas monitoring. The measurement performance was compared with a bench top blood gas analyzer. A prospective study was performed enrolling 20 patients undergoing surgery. A comparison between intermittent blood gas analyses (ABL Radiometer 610) and the results of continuous blood gas monitoring (Paratrend 7+, Agilent Technol.) was performed by simultaneous measurements. Statistical analysis in agreement with the method of "Bland and Altman" was employed. Two case reports are provided of patients with Acute Adult Respiratory Distress Syndrome and rapid changes in ventilator settings. Over a range of arterial oxygenation from 10 to 50 kPa the bias for pO2-measurement was 0.2 (limits of agreement 4), R2 = 0.9. If the arterial pO2 was higher than 50 kPa the bias was -7 (10) kPa. PCO2-measurement showed a bias of 0.25 (limits of agreement 0.45), R2 = 0.7. pH bias was -0.02 (limits of agreement 0.04), R2 = 0.7. The Paratrend…
How strong is the evidence?
Evidence Hub reads this as a case report, done in people. Its evidence level is 5 of 5 (Very low · case / narrative / animal / in vitro / in silico). Case reports, narrative reviews, and animal, cell or computer-model studies give the weakest evidence for human health. Reported size: 20 participants or records.
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