Perioperative Risk Assessment
Every perioperative risk assessment calculator on CalcEngines — unit converters, derived indices and interpretive tools, each with its formula, a worked example and the reference intervals it is judged against.
6 calculators in this section
- Apfel Postoperative Nausea and Vomiting Risk ScoreFour binary factors give a graded predicted incidence of nausea or vomiting in the first 24 hours after general anaesthesia. The score estimates the baseline risk against which prophylaxis is considered; it is not a measure of how much prophylaxis to give.
- ARISCAT Postoperative Pulmonary Risk CalculatorSeven weighted predictors of pulmonary complications after surgery, from the Catalonian ARISCAT cohort. The points are unequal and two items alone are worth 24 — an intrathoracic incision, and an oxygen saturation of 90 per cent or below.
- AUB-HAS2 Cardiovascular Risk Index CalculatorSix facts, one point each, scored before non-cardiac surgery. Derived at the American University of Beirut and validated in 1.17 million NSQIP operations, where it discriminated better than the Revised Cardiac Risk Index in every surgical subgroup.
- Metabolic Equivalents and Functional Capacity InterpreterThe four-MET threshold is embedded in every perioperative guideline and its evidence base is thinner than its ubiquity suggests. Enter the reported capacity and how it was established — the second question turns out to matter more than the first.
- Modified Aldrete Recovery Score CalculatorFive bedside observations, 0 to 2 each, scored in the recovery room. The total is a record of physiological recovery from anaesthesia and nothing more — it was never validated against any adverse outcome, and it is not a discharge authorisation.
- Modified Mallampati Airway Grade InterpreterFour classes of pharyngeal view, graded in about three seconds and agreed on rather less reliably than that suggests — published inter-rater kappas for this scale run from 0.10 to 0.80, and the technique used to obtain the view is part of the reason.