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Table 4 Evaluation of diagnostics of urine output <40 ml/hra

From: Performance and user evaluation of a novel capacitance-based automatic urinometer compared with a manual standard urinometer after elective cardiac surgery

Urinometer

AU

MU

Sensitivity (%)

90.4

98.2

Specificity (%)

98.5

96.2

Positive predictive value (%)

97.4

91.7

Negative predictive value (%)

94.4

99.2

  1. aThe automatic urinometer (AU) and manual urinometer (MU) are compared with a measuring cylinder (gold standard).