Microspike approximator for vasovasostomy.

Stabilization of the ends of the vas deferens facilitates accurate microsurgical vasovasostomy. Commercially available approximating clamps are prone to slippage. We have modified our approximating clamps by folding stainless steel wire over the tips of the clamp blades and soldering them in place. The wire is trimmed to allow a short length to protrude into the grasping surface of the clamp, which provides microspikes that grasp securely only the adventitia of the vas deferens. We have used this clamp for more than 200 anastomoses without slippage. Its use often has obviated the necessity for inguinal extension of the scrotal incision. The microspike approximator provides a permanent solution to a vexing problem. This modification may be applied to approximating clamps of any design.