Intravascular ultrasound (IVUS) places a miniature ultrasound transducer inside the vessel to produce real-time cross-sectional images of the lumen and wall. In venous work it has become a decisive tool, because the iliocaval segment is difficult to assess accurately with venography alone.
Why IVUS matters in venous disease
Single-plane venography can substantially underestimate the degree of iliac vein compression, since an obstructing lesion such as May-Thurner compression may not be apparent from certain projections. IVUS directly measures luminal area and the degree of narrowing, revealing significant lesions that venography misses and preventing both under- and over-treatment.
Clinical roles
- Diagnosis. Quantifies the true cross-sectional area reduction of an obstructive lesion.
- Stent sizing. Provides accurate vessel dimensions for selecting stent diameter and length.
- Landing-zone definition. Identifies the proximal and distal extent of disease for complete lesion coverage.
- Post-deployment assessment. Confirms full stent expansion and apposition, detecting under-expansion that predisposes to thrombosis.
Impact on outcomes
Evidence supports IVUS-guided venous stenting for more accurate lesion characterization and sizing than venography alone, contributing to appropriate stent selection and complete lesion treatment. Confirming adequate expansion at the end of the procedure supports durable patency.
Practical considerations
IVUS adds procedure time and cost, so its use is focused where it changes decisions — most clearly in the assessment and treatment of iliofemoral venous obstruction. Operator familiarity with image interpretation is essential to realize its benefit.
INVAMED technologies in this space
INVAMED offers dedicated venous stents supported by procedural imaging; explore the venous stents category.
Device availability and approved indications vary by country. This content is prepared for healthcare professionals and does not replace clinical judgment or the instructions for use.