Vascular Doppler — Reference values: Venous reflux — pathologic duration, DVT — main criterion, Internal carotid stenosis — SRU 2003.
| Measurement | Usual value | Note |
|---|---|---|
| Venous reflux — pathologic duration | > 0,5 s | superficial and deep (femoropopliteal may use > 1 s)Source: Consenso venoso / StatPearls |
| DVT — main criterion | — | non-compressible vein (+ absent flow/filling)Source: StatPearls |
| Grade | PSV (cm/s) | EDV (cm/s) | ICA/CCA ratio |
|---|---|---|---|
| Normal | < 125 | < 40 | < 2,0 |
| < 50% | < 125 | < 40 | < 2,0 |
| 50–69% | 125–230 | 40–100 | 2,0–4,0 |
| ≥ 70% | > 230 | > 100 | > 4,0 |
| Near occlusion | variable | — | — |
| Occlusion | no flow | — | — |
IAC 2023 update raised the 50% threshold to PSV > 180 cm/s and added a distinct Normal category — check your lab's adopted standard.
Source: SRU Consensus 2003 (Radiology) / Radiopaedia
| Class | Clinical finding |
|---|---|
| C0 | No visible/palpable signs |
| C1 | Telangiectasias / reticular veins |
| C2 | Varicose veins |
| C3 | Edema |
| C4 | Skin changes (pigmentation, eczema, lipodermatosclerosis) |
| C5 | Healed ulcer |
| C6 | Active ulcer |
Source: CEAP (StatPearls)