In chronic venous disease, compression therapy applies controlled external pressure to the leg in order to reduce oedema and the effects of venous hypertension. Which product is appropriate — graduated stockings, an adjustable compression device, or a multi-component bandage system — is assessed together with clinical findings, symptoms, arterial circulation, mobility, application skill, and patient preference. The clinical, aetiological, anatomical and pathophysiological (CEAP) classification records the clinical picture in standard terms from C0 to C6; on its own it is neither a product nor a pressure prescription in millimetres of mercury (mmHg).
The CEAP clinical class: what does it contribute to the compression decision?
The C component of CEAP codes the clinical findings seen in the lower limb, from C0 (no visible finding) to C6 (active venous ulcer). The aetiology (E), anatomy (A), and pathophysiology (P) components complete the full picture in the same patient; in the compression plan, C and P are the ones that carry most weight in practice.
For example, C3 denotes oedema; C4 pigmentation, venous eczema, lipodermatosclerosis, or atrophie blanche; C5 a healed and C6 an active venous ulcer. In the C5–C6 profile, the wound bed, signs of infection, arterial circulation, and whether compression can be applied safely are all parts of the same plan. The four components of CEAP and the stage definitions are described in detail in CEAP classification.
Assessment headings from C0 to C6
The table below summarises the headings to consider before a compression decision at each clinical class. The CEAP stage should not be confused with the medical device risk class. Because pressure classes of products may not carry the same number across different standards, an order should state not only “class I–III” but also the manufacturer’s ankle pressure range (mmHg) and the standard used.
| CEAP (clinical) | Typical finding | Assessment focus | Check in the product plan |
|---|---|---|---|
| C0–C1 | No visible finding, or telangiectasia / reticular veins | Symptoms, venous diagnosis, and intended use | Is the need and the expected benefit clear? |
| C2 | Varicose veins (≥3 mm) | Symptoms, oedema, intervention plan | Size, model, and ankle mmHg range |
| C3 | Oedema | Cause of oedema, arterial status, mobility | Application skill and regular re-measurement |
| C4 | Skin and subcutaneous tissue changes | Skin integrity, arterial circulation, tolerance | Stocking, bandage, or adjustable system option |
| C5–C6 | Healed or active venous ulcer | Ulcer aetiology, infection, arterial circulation | Trained application, pressure target, and follow-up plan |
Two people in the same CEAP class may differ in the severity of oedema, mobility, arterial status, manual dexterity, and tolerance. Where venous insufficiency and peripheral artery disease coexist, the ankle–brachial pressure index (ABPI) or an equivalent arterial assessment is added to the clinical plan before the level of compression is set.
Clinical assessment by stage
C0–C2: symptoms and early varicose veins
In the C0–C1 profile, the venous origin of the symptom and the aim expected from compression are assessed first. In C2, symptoms, oedema, measurements, and any planned intervention shape product selection. On the purchasing side, “compression stocking” is not a one-line definition; model, size, length, mmHg range, and the manufacturer’s standard are stated together.
C3–C4: oedema and skin change
In C3, the venous origin of the oedema, its variation through the day, and accompanying conditions are assessed. In C4, skin and subcutaneous tissue changes indicate that ulcer risk has increased. Product type and pressure are selected according to arterial circulation, leg shape, application skill, and skin tolerance. Stockings, bandages, and adjustable systems are not automatic equivalents of one another; their training and follow-up requirements differ.
C5–C6: venous ulcer and compression bandaging
C5 means a healed and C6 an active venous ulcer. Where venous aetiology is confirmed and significant arterial restriction has been excluded, strong compression is one of the core components of active venous ulcer management; the target pressure and the system are selected by a trained clinical team. Dressing selection starts with the questions in before choosing a wound product; the compression plan is shared between the wound team and the vascular team.
After endovenous laser ablation or other venous interventions, the need for compression and its duration are determined by the procedure performed and the institutional protocol. The technical distinctions between laser systems are covered in endovenous laser fibre types.
ABPI and the venous–arterial combination
Compression reduces oedema in venous pathology; where arterial perfusion is inadequate, the same pressure can affect circulation adversely. The ankle–brachial pressure index and, where needed, complementary measurements such as toe pressure help to determine the safe level of compression alongside clinical examination. In diabetes and chronic kidney disease, incompressible arteries can make the index falsely high.
When arterial and venous disease appear together in the same leg, the question is not “compression or artery” but which pressure band is safe, and that is established through vascular consultation. In the critical limb ischaemia profile, compression may be postponed until the revascularisation plan is finalised; the clinical approach is summarised in critical limb ischaemia and wounds.
Sources
- Lurie F, et al. The 2020 update of the CEAP classification system and reporting standards. J Vasc Surg Venous Lymphat Disord. 2020. doi:10.1016/j.jvsv.2019.12.075
- De Maeseneer MG, et al. ESVS 2022 Clinical Practice Guidelines on the Management of Chronic Venous Disease of the Lower Limbs. Eur J Vasc Endovasc Surg. 2022. doi:10.1016/j.ejvs.2021.12.024
- Rabe E, Partsch H, et al. Indications for medical compression stockings in venous and lymphatic disorders: An evidence-based consensus statement. Phlebology. 2018. doi:10.1177/0268355516689631
- O’Donnell TF Jr, et al. Management of venous leg ulcers: clinical practice guidelines of the Society for Vascular Surgery and the American Venous Forum. J Vasc Surg. 2014. doi:10.1016/j.jvs.2014.04.049
- VascularVita: CEAP classification · Compression pressure (mmHg) · Compression products