Results Across the range of results from 1 to 120 mmlh, the correlation coefficient was 0.844.The automated method had a mean negative bias of -9.8 mmlh (95% confidence interval: -12.2 to -7.4 mmlh). The wide scatter of results produced limits of agreement (± 2 standard deviations) between the two methods of -45 to 26 mmlh. There were seven results that were underestimated by the automated system which were clinically significant.
ConclusionsThere is a wide degree of scatter between the two sets of results. The automated system has a negative bias when compared with the manual method. There is a propensity for the automated system to sporadically underestimate the true result, sometimes to a degree that is clinically significant. The authors therefore cannot recommend replacement of the manual Seditainer system at the present time.
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