The reco instrument for the automatic anastomosis in aortic surgery

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Objective : We developed the instrument for the automatic anastomosis between aorta and artificial graft to perform aortic surgery with less invasion. The effectiveness of this instrument was evaluated in this study.Methods : U shape clip is pushed from this instrument, and goes through the artificial graft and the aortic wall. Then the tip of the U shape clip is bended inside. This procedure is successfully repeated along all the way around the artificial graft and the aortic wall. The durable tension of the instrumental anastomoses between pig aorta and woven Dacron graft was measured, and that was compared with needle suture anastomosis. The amount of leaking blood from anastomosis under the pressure of 100 mmHg was evaluated.Results : The tension until detachment of the anastomoses was greater in instrumental anastomoses group (4.9-5.4 Kg) than that in control group (2.1-2.5 Kg). The amount of the leaking blood was 3ml/m in instrumental anastomoses group and 3ml/min in control group.Conclusion : The newly developed instrument for the automatic anastomosis between aorta and artificial graft can be effective on reducing the invasion of the aortic surgery in patients with aortic aneurysm.