Endogenous adipose tissue as a hemostatic: use in microsurgery

Area of Science:

• Vascular Surgery
• Microsurgery
• Hemostasis

Background:

• Bleeding is a common complication during microsurgical repair of small blood vessels, prolonging procedure times.
• Achieving effective hemostasis is critical for successful vascular anastomosis.
• The hemostatic properties of endogenous adipose tissue are not well-established in this context.

Purpose of the Study:

• To investigate the hemostatic effect of endogenous adipose tissue on bleeding from rat femoral arterial anastomoses.
• To evaluate the impact of adipose tissue application on blood velocity and histology post-anastomosis.

Main Methods:

• Rat femoral arterial anastomoses were created.
• Bleeding time was measured after clamp removal, with and without applied adipose tissue.
• Mean arterial blood velocity was assessed immediately and 7 days post-anastomosis using micro-Doppler.
• Histological evaluation of the anastomotic site was performed.

Main Results:

• Vessels treated with adipose tissue exhibited a 50% reduction in bleeding time compared to controls.
• Mean arterial blood velocity returned to baseline levels (intact artery values) by 7 days post-anastomosis in both groups.
• Histological examination revealed no significant differences in inflammatory response between fat-treated and untreated arteries.

Conclusions:

• Endogenous adipose tissue acts as an effective hemostatic agent in microsurgical repair of small arteries.
• Adipose tissue application does not negatively impact arterial blood velocity or cause increased inflammation.
• This suggests adipose tissue is a promising, naturally occurring hemostatic agent for vascular surgery.