Experimental Microvascular Suture Anastomosis

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Abstract
To evaluate the limits imposed by blood vessel size on success or failure of vascular anastomosis by suture techniques, tiny vessels in young CFN rats were anastomosed by microsuture technique, using the Zeiss operating microscope at 16 and 25 magnifications. In series I aortae averaging 1.3 mm external diameter prior to manipulation were divided transversely and rejoined by suture anastomosis. In series II inferior venae cavae averaging 2.7 mm external diameter prior to manipulation were similarly treated. In series III both of these procedures were performed in each animal. There were ten animals in each group. Of 40 consecutive anastomoses only three were not patent when the animals were sacrificed three weeks after surgery. Two of the failures were arterial, and one was venous. This high success rate was achieved only when certain refinements in technique had been perfected. The feasibility of suture anastomosis of extremely small veins as well as arteries has been demonstrated.

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