Microvascular anastomoses utilizing new intravascular stents

Area of Science:

• Microsurgery
• Biomaterials Science
• Vascular Surgery

Background:

• Microsurgical techniques have advanced, enabling smaller vessel anastomosis.
• Traditional suture methods cause stenosis and intimal damage, limiting their use in very small vessels.

Purpose of the Study:

• To develop and evaluate a novel fibrin glue-based anastomosis technique using a meltable glyceride stent for small-diameter vessels.
• To compare the efficacy and safety of the novel stent technique against standard suture methods.

Main Methods:

• Development of a meltable stent composed of mono-, di-, and tri-glycerides.
• Application of fibrin glue over the stent for vessel anastomosis.
• In vivo rodent studies utilizing the 0.35 mm inferior epigastric artery model.
• Development of a glyceride-coated polyethylene glycol-based stent for laser-assisted anastomoses.

Main Results:

• The fibrin glue-stent technique demonstrated superior immediate and short-term patency rates compared to suture anastomosis in rodent models.
• The stent technique was significantly faster and easier to perform than the traditional suture technique.
• A decrease in late patency was observed, attributed to aneurysm formation with the glyceride stent method.

Conclusions:

• The meltable glyceride stent with fibrin glue offers a promising alternative for small-vessel anastomosis, improving speed and initial patency.
• Further research is needed to address the issue of late aneurysm formation and improve long-term patency.
• Ongoing work includes developing improved stent designs, such as a glyceride-coated PEG stent for laser anastomoses.