This calculator assists in deciding whether the patient had bled. If the observed new Hct is lower than the calculated new Hct here, clinical suspicion for bleeding should be higher. New Hct is the Hct after an interval of positive (or negative) I/O balance. The balance is factored into the calculation to get the calculated new Hct. Conversely, if the observed new Hct is higher than the calculated new Hct here, then bleeding is less likely. In the latter, leakage is more likely. In both scenarios, correlate with crucial clinical findings such as hemodynamic parameters.
Conversion factor, f:
Adult male

75 ml/kg

Adult female

65 ml/kg

Infant

80 ml/kg