Utilization of the unitary anastomotic device metallic ring and the conventional technique of suture for experimental anastomosis of the carotid artery in dogs

Abstract

The present study aimed to compare the technique of conventional closing-terminal anastomosis, with the use of the Unitary Anastomotic Device (UAD) metallic ring. The study was carried out with six mongrel dogs, young adult male dogs. The animals were submitted to experimental closing-terminal anastomosis of the carotid artery, by two surgical techniques. On one side, the conventional technique of continuous suture with polypropylene 5-0 was used with the union of three equally distant stitches and on the counter-lateral artery, the metallic ring was used bonding the vascular extremities with the same thread. The time of execution of the anastomosis, the presence of hemorrhage during the surgical procedure, the diameter of the vessels and the blood speed (PVS) through ultrasonography with a colored Doppler were all compared after the anastomosis. In the clinical evaluations, the methods used presented similar results. The time of execution was significantly shorter on the side of the metallic ring, in which no hemorrhage episode was observed. Vessel diameter on the side of metallic ring was statistical larger than the side of conventional suture which contributes for the lower PVS, although it does differ statistically (P >; 0.05). In conclusion, both methods are efficient, however, the metallic ring provides a significantly shorter time of execution which contributes for laborious surgery with many anastomosis, like organs transplants, where the time of organ ischemy can be crucial for patient survival.