Vascular Calculators

In patients ≥50 years with low-to-moderate pre-test probability of PE or DVT, D-dimer threshold is increased using the formula: age × 10 µg/L (or × 10 ng/mL). This increases specificity while maintaining sensitivity, reducing unnecessary imaging. Validated by ADJUST-PE and multiple meta-analyses.

Validated scoring system for diagnosing familial hypercholesterolaemia (FH) based on family history, personal history, physical examination, LDL-cholesterol levels, and DNA analysis. Score ≥8 = definite FH. NICE and EAS recommended.

UK criteria for diagnosing familial hypercholesterolaemia (FH). Requires total cholesterol >7.5 mmol/L (or LDL >4.9 mmol/L in adults) PLUS either tendinous xanthomata in patient/relative OR known mutation. Used by NICE CG71 for FH identification.

Clinical scoring tool for diagnosis and severity grading of post-thrombotic syndrome (PTS) following deep vein thrombosis (DVT). 5 patient symptoms + 6 clinician signs, each scored 0–3. Total 0–33. Score ≥5 = PTS; score ≥15 or presence of ulcer = severe PTS.

US diagnostic criteria for FH based on total cholesterol levels adjusted for age and relationship to a known FH proband (Make Early Diagnoses — Prevent Early Deaths programme). Widely used in North America for FH cascade screening.

Diagnoses and grades severity of peripheral arterial disease (PAD). ABI = ankle systolic BP / brachial systolic BP. Predicts cardiovascular risk.

Assesses features of critical limb ischaemia using Rutherford/SVS classification. Guides urgency of revascularisation.

Estimates annual rupture risk of abdominal aortic aneurysm (AAA) based on diameter. Guides surveillance and surgical planning.

Pressure Ulcer Scale for Healing (PUSH) assesses wound size, exudate, and tissue type to monitor healing progress. Used for chronic wounds including pressure ulcers and venous leg ulcers.

Classifies carotid artery stenosis severity and guides endarterectomy vs stenting vs medical management based on NASCET criteria.

Quantifies severity of chronic venous disease using 10 attributes. Guides treatment escalation from compression to intervention.

Estimates 30-day mortality and morbidity risk for lower extremity bypass surgery. Based on Vascular Study Group NSQIP model.

Standard staging system for chronic lower-extremity ischaemia (Rutherford 1997). Categories 0–6 from asymptomatic to major tissue loss. Used alongside ABPI and Fontaine to guide intervention timing per ESVS 2024 and NICE CG147.

Clinical class (C0–C6) of the CEAP system (Eklöf et al. 2004, revised 2020). Aetiology / Anatomy / Pathophysiology assessed separately. Drives compression, ablation, and ulcer-care decisions.

Four-stage European staging of chronic lower-limb ischaemia (Fontaine 1954). Complements Rutherford. Used in ESVS guidance.

Trans-Atlantic Inter-Society Consensus II anatomic classification of peripheral arterial lesions (Norgren 2007). Guides endovascular vs open surgical revascularisation.

Five preoperative variables predicting in-hospital mortality after open repair of ruptured AAA (Hardman 1996). Each scored 1.

Predicts perioperative mortality in elective and ruptured AAA repair (Samy 1994). GAS = age + 17(shock) + 7(MI) + 10(CVD) + 14(renal disease).