Venographic classification of sub-torcular collaterals and post-stenting flow changes

Sub-torcular venous collaterals were present in 96% of venous sinus stenting procedures for intracranial hypertension. Jugular bulb-origin collaterals (Type 3) showed less post-stent flow reduction than torcular-origin (Type 1) (p=0.02), though quantitative area changes were sim…

• Among 48 venous stenting procedures in 41 adults (92% female, mean age 38.5), 96% had sub-torcular collaterals; Type 3 (jugular bulb) was most common (63%), with substantial interobserver agreement (Fleiss κ 0.687–0.856).
• Qualitative assessment: Type 3 channels remained opacified in 16/30 procedures post-stenting, while Type 1 flow decreased (11/21) or resolved (7/21) (p=0.02).
• Quantitative median percent change in collateral area (Type 1: 13.22% vs Type 3: 16.32%, p=0.76) and Jaccard index (57.56 vs 63.67, p=0.24) did not differ significantly.

Automated summary

RadPigeon summaries are original and for information only. They are not clinical advice.