Evidence suggests rigid aortic grafts increase systolic blood pressure: Results of a preliminary study

摘要: Abdominal aortic aneurysm (AAA) is a serious complication of the aorta and treated using vascular bypass grafts. Two main classes graft are available to treat AAA; grafts implanted by open surgery stent-grafts minimally invasive endovascular techniques. Both consist an section which bifurcates into two iliac sections. It has been hypothesized that implantation serve significantly increase abdominal pressures. In this study, open-loop computer-controlled pumping system was built produce physiologically realistic pressure flow-rates. Models compliant aneurysm, walled tapered were manufactured injection moulding technique fused deposition modelling used create rigid graft. A specific transient flow-rate waveform then applied at inlet each model resulting waveforms 30 mm upstream from bifurcation recorded. Peak measurements recorded over course pulse for model. The found have systolic 107 mmHg while complaint 153 mmHg. had peak 199 graft, dropped 142 data suggests implanting in place vitro flow circuit can pressures may alleviate problem.