Hao-Hua Wang1,2,3, Jia Ma4, Shan-Pei Wang1,2,3, Feng Ma2,3, Jian-Wen Lu1,2,3, Xiang-Hua Xu1,2,3, Yi Lv5,6,7, Xiao-Peng Yan8,9,10. 1. Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China. 2. National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, Xi'an, 710061, People's Republic of China. 3. Shaanxi Province Center for Regenerative Medicine and Surgery Engineering Research, Xi'an, 710061, People's Republic of China. 4. Department of Surgical Oncology, The Third Affiliated Hospital of Xi'an Jiaotong University (Shaanxi Provincial People's Hospital), Xi'an, China. 5. Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China. luyi169@126.com. 6. National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, Xi'an, 710061, People's Republic of China. luyi169@126.com. 7. Shaanxi Province Center for Regenerative Medicine and Surgery Engineering Research, Xi'an, 710061, People's Republic of China. luyi169@126.com. 8. Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, 710061, Shaanxi, People's Republic of China. yanxiaopeng99@163.com. 9. National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, Xi'an, 710061, People's Republic of China. yanxiaopeng99@163.com. 10. Shaanxi Province Center for Regenerative Medicine and Surgery Engineering Research, Xi'an, 710061, People's Republic of China. yanxiaopeng99@163.com.
Abstract
PURPOSE: This study evaluated a novel magnetic compression technique (magnamosis) for creating a portacaval shunt in a canine model of portal hypertension, relative to traditional manual suture. METHODS: Portal hypertension was induced in 18 dogs by partial ligation of the portal vein (baseline). Six weeks later, extrahepatic portacaval shunt implantation was performed with either magnetic anastomosis rings, or traditional manual suture (n = 9, each). The two groups were compared for operative time, portal vein pressure, and serum biochemical indices. Twenty-four weeks post-implantation, the established anastomoses were evaluated by color Doppler imaging, venography, and gross and microscopic histological examinations. RESULTS: Anastomotic leakage did not occur in either group. The operative time to complete the anastomosis for magnamosis (4.12 ± 1.04 min) was significantly less than that needed for manual suture (24.47 ± 4.89 min, P < 0.01). The portal vein pressure in the magnamosis group was more stable than that in the manual suture group. The blood ammonia level at the end of the 24-week post-implantation observation period was significantly lower in the magnamosis group than in the manual suture group. Gross and microscopic histological examinations revealed that better smoothness and continuity of the vascular intima had been achieved via magnamosis than with manual suture. CONCLUSION: Magnamosis was superior to manual suture for the creation of a portacaval shunt in this canine model of portal hypertension.
PURPOSE: This study evaluated a novel magnetic compression technique (magnamosis) for creating a portacaval shunt in a canine model of portal hypertension, relative to traditional manual suture. METHODS: Portal hypertension was induced in 18 dogs by partial ligation of the portal vein (baseline). Six weeks later, extrahepatic portacaval shunt implantation was performed with either magnetic anastomosis rings, or traditional manual suture (n = 9, each). The two groups were compared for operative time, portal vein pressure, and serum biochemical indices. Twenty-four weeks post-implantation, the established anastomoses were evaluated by color Doppler imaging, venography, and gross and microscopic histological examinations. RESULTS:Anastomotic leakage did not occur in either group. The operative time to complete the anastomosis for magnamosis (4.12 ± 1.04 min) was significantly less than that needed for manual suture (24.47 ± 4.89 min, P < 0.01). The portal vein pressure in the magnamosis group was more stable than that in the manual suture group. The blood ammonia level at the end of the 24-week post-implantation observation period was significantly lower in the magnamosis group than in the manual suture group. Gross and microscopic histological examinations revealed that better smoothness and continuity of the vascular intima had been achieved via magnamosis than with manual suture. CONCLUSION: Magnamosis was superior to manual suture for the creation of a portacaval shunt in this canine model of portal hypertension.
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