A Clampless Technique to Facilitate Successful End-to-End Anastomosis in Small Vessels With Spasm

End-to-end anastomosis in small arteries can be challenging, especially when the stumps are in spasm after traumatic transection. We describe a novel technique to facilitate such anastomoses under local anesthesia, presenting a 24-year old patient who suffered complete traumatic transection of the left ulnar artery. After having found and prepared the proximal and distal stumps, a soft polyurethane feeding tube (La-med Healthcare, India) and a vein cannula were inserted in the proximal and distal stump, respectively, without using vascular clamps. The manipulation of the catheters offered excellent visualization and widening of the anastomotic line, enabling simultaneous infusion of heparinized saline or vasodilating agents. The anastomosis was completed with no stenosis and pulpable pulses were restored immediately postoperatively. At 1-month follow-up, the Allen test was normal with a normal regular flow of the ulnar artery at duplex ultrasound. The described technique ensures efficient sealing avoiding clamping, casts the small lumens, provides optimal visualization of the anastomotic aspects and prevents stenosis. We believe it should have a place in the surgeon's armamentarium.