4PEPS — Pulmonary Embolism Clinical Probability is a pulmonology tool commonly applied in Emergency Medicine. Four-level weighted clinical pretest probability (13 variables, −2 to +5 points) with linked D-dimer/imaging strategies from derivation studies. Use the interactive calculator for inputs, limitations, and primary references.

Not a substitute for clinical judgment. Verify critical values with primary literature, local protocols, and specialist input when appropriate.