1,329 calculators and references across 60 specialties, with formula confidence shown up front.
Perioperative NT-proBNP Risk Triage Model: Comprehensive Explanation and Clinical Context N-terminal pro–B-type natriuretic peptide (NT-proBNP) is a cardiac biomarker that reflects myocardial wall stress and neurohormonal activation. In large perioperative cohorts, preoperative NT-proBNP provides substantial prognostic information for vascular death and myocardial injury after noncardiac surgery (MINS) within 30 days
Postoperative AKI after Cardiac Surgery (AKICS): Explanation and Clinical Context The AKICS score is a bedside tool derived and prospectively validated to predict acute kidney injury (AKI) after elective cardiac surgery. It integrates preoperative, intraoperative, and early postoperative information available at ICU admission: combined surgery (e.g., CABG plus valve), NYHA class ≥ 2, pre-operative serum creatinine >
Postoperative Atrial Fibrillation (POAF) Risk Score: Explanation and Clinical Context The Postoperative Atrial Fibrillation (POAF) Risk Score, developed by Mariscalco and colleagues, provides a simple, evidence-based model to estimate the likelihood of new-onset atrial fibrillation after cardiac surgery. The score incorporates nine routinely available preoperative clinical variables: age, sex, chronic obstructive pul
Geriatric Depression Scale – 5 item (GDS-5) History of Stroke or Transient Ischemic Attack Select... Yes No Serum Albumin (g/dL) Abnormal is defined as <3.5 or >5.2 g/dL in the original rule. Postoperative Delirium Cardiac Risk Score (Rudolph et al., 2009): Explanation and Clinical Context This pre-operative rule was derived and validated in older adults undergoing cardiac surgery and assigns points for cognitive imp
Postoperative Stroke Risk Model: Explanation and Clinical Context This calculator estimates 30-day postoperative ischemic stroke risk after noncardiac, nonneurologic surgery using preoperative variables. Predictors are derived from NSQIP-based studies and include age, prior stroke/TIA, coronary disease, recent myocardial infarction, renal dysfunction, anemia, dysnatremia, COPD, hypertension, smoking, ASA class, emerg
Pre-op Hemodynamic Optimization Index (PHOI): Rationale, Use, and Evidence The PHOI provided here is a pragmatic composite to help clinicians summarize the patient’s immediate pre-operative hemodynamic state and identify modifiable targets before anesthesia induction. It is not a published or validated score; to our knowledge there is no original “Pre-op Hemodynamic Optimization Index” in the literature. The componen