Title: Biomechanical characterization of a novel ring connector for sutureless aortic anastomosis

 

Authors: Huan Liu, Shijiang Zhang, Yongfeng Shao, Xiaohu Lu, Weidong Gu, Buqing Ni, Qun Gu, Junjie Du

 

Institution: Department of Cardiovascular Surgery, The First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu 210029, China.

 

Abstract: The surgical treatment for aortic diseases remains a challenge for any cardiac surgeon. The use of sutureless ring connector in aortic anastomosis can simplify the procedure and shorten anastomosis time. Therefore, we developed a novel device for sutureless aortic anastomosis. A series of experiments were carried out for tensile and leakproof-capacity assessments to verify the feasibility of the ring connector by using fresh swine aorta samples. In in vivo test, the ring connector was implanted in 6 swine with follow-up of 6 months. Radiographic and pathological studies of the aorta were performed. In the tensile tests, the strength was 32.7 5.9 Newton (N) in the sutureless anastomosis group, compared with 73.3 12.5 N in the control group by traditional manual suture. In the leakproof-capacity assessment, no sign of either leakage or bursting was evident at 280 mmHg of internal pressure in the aorta samples. In in vivo tests, it took 9.47 0.3 minutes for the sutureless anastomosis, compared with 15.58 1.39 minutes for hand-sewn suturing. Insertion was easy and rapid. Radiographic and pathological studies were performed at first month, third month and sixth month after surgery, each time obtained from the two swine, showed patency of the anastomosis and no signs of stenosis, blood leakage, migration or pseudoaneurysm formation, except one paralyzed swine developed of thrombo-occlusion at the site of the sutureless anastomosis. The result indicates that this novel ring connector offers considerable promise for sutureless aortic anastomosis.

 

Keywords: aortic diseases, sutureless device, aortic anastomosis, swine

 

Full Text: JBR-2017-0011.pdf

 

J Biomed Res published on 28 May 2017,doi:10.7555/JBR.31.20170011