Vascular & Interventional

Estimates glomerular filtration rate from serum creatinine, age, and sex using the 2021 race-free CKD-EPI creatinine equation, with KDIGO G1-G5 staging.

Computes the MELD 3.0 score from bilirubin, INR, creatinine, sodium, albumin, sex, and dialysis status, with the corresponding estimated 90-day survival; the current standard for liver transplant allocation.

Stratifies 30-day mortality risk in acute pulmonary embolism from 11 clinical variables (original PESI, classes I-V) and reports the simplified PESI alongside.

Calculates the arterial resistive index (PSV - EDV) / PSV from spectral Doppler velocities and flags elevation against the usual native-renal threshold of about 0.70.

Grades post-thrombotic syndrome after deep vein thrombosis by summing five patient-reported symptoms and six clinician-assessed signs (each 0-3), with a venous ulcer automatically signifying severe disease.

Scores seven bedside items to classify suspected pulmonary embolism as unlikely or likely (two-tier) or low/moderate/high (three-tier), directing the workup to D-dimer testing or straight to imaging.

Combines nine one-point clinical items with a −2-point alternative-diagnosis item to classify suspected lower-limb DVT as unlikely or likely (NICE two-tier) or low/moderate/high (three-tier).

A fully objective alternative to the Wells score: eight standardized variables (including a heart-rate band) yield a low/intermediate/high or unlikely/likely probability of PE.

When the clinician's gestalt pre-test probability of PE is low, the absence of all eight PERC criteria excludes PE without any D-dimer or imaging.

Compares a measured D-dimer against the conventional 500 ng/mL FEU cutoff or, for patients over 50, the age-adjusted cutoff (age x 10 ng/mL FEU), with automatic FEU/DDU unit conversion.

Divides the higher ankle systolic pressure of each leg by the higher brachial systolic pressure to diagnose and grade peripheral artery disease; flags non-compressible vessels above 1.40.

Adds points for heart failure, hypertension, age bands, diabetes, prior stroke/TIA, vascular disease, and female sex to estimate the annual stroke risk in atrial fibrillation and guide oral anticoagulation.

Counts nine one-point bleeding-risk factors in anticoagulated (or candidate) atrial-fibrillation patients; a score of 3 or more flags high bleeding risk and prompts correction of modifiable factors rather than withholding anticoagulation.

Maps angiographic or CTA lesion pattern in the aortoiliac or femoropopliteal segment to TASC II type A–D. Types guide the historical preference for endovascular versus open revascularization; aortoiliac and femoropopliteal tables differ and must be selected separately.

Assigns Rutherford category 0–6 for chronic lower-extremity ischemia using clinical description plus objective hemodynamic criteria (treadmill/ankle and toe pressures, PVR). Rough Fontaine-stage cross-references are included for communication with teams that use the European clinical scale.

Builds a basic CEAP descriptor for chronic venous disease from clinical class (C0–C6), symptom status (S/A), etiology, anatomic compartments, and pathophysiology. The compute step assembles the standard string (e.g., C3,S Ep As,p Pr) and explains each component.