The V-Plasty: A Novel Microsurgical Technique for Anastomosis of Vessels with Marked Size Discrepancy

The art of reconstructive microsurgery is still progressing after Carrel's original description of "vascular repair" in 1902. Reports of the successful repair of vessels smaller than 1 mm in diameter are currently commonplace. However, the technique of microvascular anastomosis to connect vessels with large diameter discrepancy, greater than 1 mm, has not yet been perfected. This article reports a novel option to anastomose two vessels of different sizes by adapting the diameters of the two stumps and creating a gentle slope that dramatically reduces turbulences in the blood stream.

The "V-plasty" consists in designing a v-shaped flap on the wall of the large vessel and a longitudinal incision on the small one. The V-flap is then introduced into the V-defect of the small vessel, creating a smooth transition of the diameters between the two vessels. Mathematical calculation of the dimensions of the V-flap was conducted with different ratios' discrepancies of the two vessels ranging from 1.5 to 4. Clinically, 14 microvascular V-plasty were performed in 8 patients.

The theoretical simulation and our clinical experience of 14 cases allowed us to propose the different dimensions (length and width) of the V-plasty according to the ratio of vessels discrepancies.

The V-plasty microanastomosis is an alternative method to attach vessels with size discrepancy. It simply equalizes the donor and recipient vessels' diameters. Its main advantage is to maintain a linear axis between the two vessels whatever the discrepancy ratio is.