Recently, diabetic patients are increasing in the field of microvascular surgbery. Diabetes melltius is known to be related to arterial damage, platelet malfunction and thrombus formation. After microvascular anastomosis, delayed repairand
vascular
occlusion occurred more freuquently in diabetic state.
This study was performed to investigate the patency rate and process of endothelial healing after microvascular anastomosis of femoral artery in diabetic rat by scanning electron microscope. The animals were divided into two groups, 20
diabetic-induced
and 20 non-diabetic groups. Diabetes was induced with a injection of Streptozotocin (50 mg/kg b. w., Sigma Chemical Co.) to tail vein.
@ES The results obtained were as follows:
@EN 1. Macroscopically, anastomotic site was intact except a few cases showed minimal inflammatory sign around the wound site. But the inflammatory change was frequently occurred in diabetic-induced group.
2. The patency rate was 95% (19/20) in non-diabetic group and 65% (13/20) in diabetic-induced group.
3. In the non-diabetic group, anstomotic region was mostly endothelized by the alignment along the long axis of vessel but stitchs were not covered with endothelial cells. The thichkening of vessel wall was not observed.
4. In the diabetic-induced group, anastomotic region was not endothelized but covered with blood cellular components and connective tissue insteaad of endothelial cells. The thickening of the vessel wall was prominent in some diabetic-induced
rats.
These results suggest that diabetes was related to delayed regeneration of endothelium of vesels after microsurgical anastomosis.
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