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Accuracy and Reproducibility of Arterial Blood‐Gas and pH Measurements
Author(s) -
LadegaardPedersen H. J.
Publication year - 1978
Publication title -
acta anaesthesiologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.738
H-Index - 107
eISSN - 1399-6576
pISSN - 0001-5172
DOI - 10.1111/j.1399-6576.1978.tb01356.x
Subject(s) - medicine , reproducibility , pco2 , confidence interval , limits of agreement , blood sampling , arterial blood , anesthesia , biomedical engineering , sampling (signal processing) , nuclear medicine , chromatography , optics , chemistry , physics , detector
In 30 patients blood samples were taken from both radial arteries and analysed for Pco 2 , Po 2 and pH. The influence of sampling technique on the accuracy of blood‐gas analysis was determined. The 95% confidence limits for Pco 2 measurements were ±0.32 kPa (2.4 mmHg), and for Po 2 measurements were ±1.16 kPa (8.8 mmHg) in the range below 20 kPa, and ±2.94 kPa (22.0 mmHg) above 20 kPa. For pH, the 95% confidence limits were ±0.014. Only the Po 2 measurements were significantly influenced by the sampling procedure.