Graduated compression hosiery — applying greatest pressure at the ankle and decreasing proximally — is one of the most evidence-supported, underutilized, and frequently incorrectly fitted interventions in clinical practice. From DVT prevention in surgical patients to long-term management of venous insufficiency, chronic edema, and lymphedema, compression therapy produces meaningful clinical outcomes when properly prescribed and fitted.
Mechanisms of Action
Graduated compression works through multiple mechanisms: increased interstitial pressure reduces capillary filtration and edema formation; improved venous return velocity reduces stasis (a DVT risk factor); compression of superficial veins redirects blood through deeper, more competent venous pathways; and in lymphedema, compression supports lymphatic drainage by reducing the lymphatic load that overwhelmed lymphatics must handle. For venous ulcers, sustained compression is the single most effective intervention for healing — with healing rates 2–3× higher than non-compression wound care alone.
Compression Levels and Indications
15–20 mmHg (mild): flight prophylaxis, tired/achy legs, mild varicosities, pregnancy prevention — available over the counter. 20–30 mmHg (moderate): active DVT prophylaxis, mild-moderate varicose veins, mild lymphedema, post-sclerotherapy — most common prescription level. 30–40 mmHg (firm): moderate-severe venous insufficiency, moderate lymphedema, healed venous ulcer prevention, post-thrombotic syndrome — requires Rx and careful fitting. 40–50+ mmHg (extra firm): severe lymphedema, severe venous disease — requires specialist fitting. Our orthopedic and rehabilitation catalog includes medical-grade compression hosiery across all compression levels, and our wound care supplies complement compression therapy for venous ulcer management.
DVT Prevention Evidence: Hospitalized Patients
Knee-high vs thigh-high: large RCTs (including the CLOTS trials) showed thigh-high graduated compression stockings (GCS) superior to knee-high for DVT prevention in immobile stroke patients — while counterintuitive (thigh-high being less comfortable and adherence-challenging), the data favor thigh-high in high-risk populations. Pneumatic compression (sequential compression devices, SCDs) shows additive benefit over GCS alone in surgical patients. Contraindications requiring careful assessment: peripheral arterial disease (ABI < 0.5–0.8 is absolute contraindication — compression worsens ischemia), severe peripheral neuropathy, and uncontrolled congestive heart failure. For facilities managing post-surgical and immobile patients, our patient care section includes sequential compression devices and anti-embolism stockings.
