Fluids & Blood
Fluid management and blood loss calculators for intraoperative use.
Maintenance Fluids (4-2-1 Rule)
Calculates hourly maintenance fluid rate using the Holliday-Segar 4-2-1 method.
NPO Fluid Deficit
Estimates the fluid deficit accumulated during preoperative fasting based on maintenance rate and NPO duration.
Estimated Blood Volume
EBVEstimates total circulating blood volume based on weight and patient type (adult, child, infant, neonate).
Maximum Allowable Blood Loss
MABLCalculates the maximum blood loss before transfusion is indicated based on starting and target hematocrit.