Temporary luminal arteriotomy seal for bypass grafting

Area of Science:

• Cardiovascular Surgery
• Vascular Anastomosis
• Surgical Innovation

Background:

• Off-pump coronary artery bypass grafting requires a bloodless field to prevent ischemic complications.
• Current methods for achieving a bloodless field may have limitations.

Purpose of the Study:

• To develop and evaluate a temporary luminal arteriotomy seal for off-pump coronary operations.
• To assess the seal's efficacy in creating a bloodless surgical field without causing ischemic complications.

Main Methods:

• A polyurethane elliptic convex seal was used to temporarily occlude the arteriotomy in a porcine carotid artery bypass graft model.
• Quantitative measurements of endothelial denudation, medial necrosis, and intimal hyperplasia were performed.
• Results were compared to conventionally sutured anastomoses.

Main Results:

• The seal provided a bloodless arteriotomy in all anastomoses with short occlusive times (90 seconds for insertion, 82 seconds for retrieval).
• Suturing was performed without leakage and with unimpeded flow.
• Minimal endothelial denudation (one third of circumference) and no medial necrosis were observed. Intimal hyperplasia was comparable to conventional suturing.

Conclusions:

• The temporary luminal arteriotomy seal effectively creates a bloodless surgical field during end-to-side bypass grafting.
• The seal does not impede recipient artery blood flow and causes minimal arterial wall damage.
• This device offers a promising solution for improving safety and outcomes in off-pump coronary procedures.