Intermediate
Technical
IVT
patency rate
The percentage of treated vessels remaining open and functional at specified time intervals following intervention.
Full Definition
Patency rate represents the proportion of successfully treated vessels that remain open without significant restenosis at defined follow-up periods, typically reported at 1, 3, and 5 years. Primary patency refers to uninterrupted vessel openness without reintervention, while secondary patency includes vessels that remain open after additional procedures. These metrics are critical for comparing treatment modalities and informing patient counseling about expected durability of different therapeutic approaches.
Usage
Usage note: Always specify whether reporting primary, assisted primary, or secondary patency rates.
In Context
- "The five-year primary patency rate for this stent type was 78% in published trials." — Literature review
- "Secondary patency rates improved to 85% when including successful reinterventions." — Outcomes analysis
Also known as
vessel patency
graft patency
Contrasted with
occlusion rate
failure rate
Don't confuse with
success rate
survival rate