Autologous vein stent-graft: feasibility study

Area of Science:

• Vascular surgery
• Biomedical engineering
• Regenerative medicine

Background:

• Endoluminal grafting requires robust graft materials.
• Autologous veins are a potential source for graft material but require structural support.
• Expandable stents offer a scaffold for tissue integration.

Purpose of the Study:

• To evaluate the feasibility of using expandable stents integrated into vein walls as autologous vein stent-grafts.
• To assess the healing and mechanical properties of these novel stent-grafts for endoluminal applications.

Main Methods:

• Expandable stents were implanted into canine jugular veins.
• Vascular patency was monitored via ultrasonography.
• Harvested vein segments underwent microscopic examination and mechanical stress testing.

Main Results:

• Successful stent integration and endothelialization were observed in most cases.
• A neointimal layer of 0.115 mm thickness fully covered the grafts.
• The autologous vein stent-grafts resisted mechanical manipulation without intimal damage or loosening.

Conclusions:

• Expandable stents healed into vein walls can serve as effective autologous vein stent-grafts.
• These stent-grafts are suitable for endoluminal grafting procedures, tolerating transcatheter introduction.