Optimization of stent implantation using a high pressure inflation protocol

Area of Science:

• Cardiovascular medicine
• Interventional cardiology
• Biomedical engineering

Background:

• High-pressure inflation is standard for stent deployment, but lacks a defined protocol.
• A novel
• pressure optimization protocol
• (POP) was developed using inflation pressure stability to determine optimal stent inflation duration.

Purpose of the Study:

• To establish stent inflation time (IT) in a large patient cohort using the POP.
• To correlate patient and lesion characteristics with IT.
• To determine the pressure accommodation time of inflation systems in vitro.

Main Methods:

• A retrospective analysis of 615 stent implants in 435 patients.
• Multivariate analysis to identify predictors of prolonged IT.
• In vitro inflation of various stent/balloon systems to measure pressure accommodation time.

Main Results:

• Mean stent IT was 104 ± 41 seconds (range 30-380 seconds).
• Stent length was the sole predictor of prolonged IT.
• In vitro system accommodation time averaged 33 ± 24 seconds; the POP was safe (<3% premature terminations), with no serious adverse events.

Conclusions:

• Stable inflation pressure requires over 100 seconds on average, potentially minutes for some cases.
• Stent length is a key factor influencing IT.
• The POP promotes safe, predictable, and complete stent deployment, suggesting rapid inflation/deflation may be insufficient.