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Continuous monitoring of blood P o 2 in extracorporeal systems
Author(s) -
CLAREMONT D. J.,
PAGDIN T. M.,
WALTON N.
Publication year - 1984
Publication title -
anaesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.839
H-Index - 117
eISSN - 1365-2044
pISSN - 0003-2409
DOI - 10.1111/j.1365-2044.1984.tb07279.x
Subject(s) - medicine , analyser , extracorporeal circulation , extracorporeal , blood sampling , blood gas analysis , arterial blood , anesthesia , whole blood , significant difference , biomedical engineering , surgery , chromatography , chemistry
Summary The technique of intermittent sampling of blood during extracorporeal circulation and in vitro analysis to establish that the blood‐gas status of the patient is within acceptable limits has drawbacks which may be overcome by continuous monitoring. An evaluation of an oxygen monitoring system and a comparison with a blood gas analyser have been performed. Blood of known PO 2 was circulated at 15°, 25° and 37°C in an extracorporeal system and the monitor readings and results from samples analysed on a blood gas analyser were compared with calculated partial pressures. There was no significant difference between the calculated value and the monitor readings but the blood gas analyser results were significantly lower (p < 0.01) than the calculated values of the tonometered blood. The reasons for this difference and the potential clinical advantages of continuous monitoring are discussed.