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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).