Evidence Checklist: Deep Vein Thrombosis Residuals (Post-Thrombotic Syndrome)

Venous duplex ultrasound documenting residual thrombosis or chronic changesCritical

Duplex Doppler ultrasound confirming residual deep vein thrombosis, chronic venous occlusion, or post-thrombotic changes (reflux, valve incompetence). This is the primary objective study.

Nexus opinion linking DVT to service ("at least as likely as not")Critical

A medical opinion connecting DVT to immobilization during service, in-flight blood clot (long deployments), surgery during service, or other service-related prothrombotic factor.

Records of original DVT diagnosis (acute event)Critical

Medical records documenting the original DVT event — imaging confirmation, treatment initiated, and hospital or ER records. Establishes the causal chain.

Anticoagulation therapy records

Records of anticoagulant treatment (warfarin, heparin, direct oral anticoagulants), INR monitoring, and duration of therapy.

Compression stocking prescription

Documentation of prescribed compression stockings for post-thrombotic syndrome management.

Documentation of post-thrombotic syndrome symptoms

Records or personal statement documenting chronic leg swelling, pain, skin changes, and venous claudication resulting from the DVT — these drive the residual rating.

Buddy statement from spouse, family, or fellow service member

A written statement from someone who can describe observable symptoms and how your condition affects daily life.

Completed DBQ Artery and Vein ConditionsCritical

Standardized form capturing venous duplex findings, edema measurements, skin changes, and functional limitations from DVT residuals.

Service treatment records (STRs)Critical

Military medical records showing in-service treatment, complaints, or injuries related to this condition.