Rapid and effective sutureless end-to-end IVC anastomosis by magnetic compression anastomosis technique

Abstract

Objective To evaluate the magnetic pinned-ring device for non-suture vascular anastomosis in dogs.Methods Sixteen adult mongrel dogs of either gender were randomly divided into two guoups for IVC in situ end-to-end anastomosis:group MCA (n =8) using magnetic rings for IVCreconstruction,and hand-sewing group (n =8).Operation time and anastomotic leaking were recorded.Patency and stoma stenosis was evaluated by color Doppler ultrasound scanning,Ⅹ-ray cholangiography and histological examination at different time points as late as 6 weeks after surgery.Results The time required to perform the vascular anastomosis was significantly shorter for the magnetic device (3.2 ± 1.2)min than for hand sewing (13.2 ± 2.3) min (P =0.000).Anastomotic leaking occurred in 5 dogs in handsewing anastomosis group.Vascular Ⅹ-ray angiography and color Doppler ultrasound identified normal blood flow in magnetic anastomosis group,and no stoma stenosis,while there were 3 stoma stenosis in the manual suture group.Magnetic ring device stoma is superior to manual suturing in smooth re-endothelialization,less fibrotic collagen deposition and depressed infihration of irnlammatory cells at the anastomotic site.Conclusions The magnetic ring device offers a simple,fast,reliable,and efficacious technique for nonsuture vascular anastomosis with satisfactory prognosis. Key words: Anastomsis, surgical; Inferior vena cava; Magnetic compression anastomosis