This paper aims to provide a design about a kind of low-cost ＂sub-mother＂ UAV small formation by using the low-cost micro-UAV as the platform. Combined with the current international situation in the UAV formation r...This paper aims to provide a design about a kind of low-cost ＂sub-mother＂ UAV small formation by using the low-cost micro-UAV as the platform. Combined with the current international situation in the UAV formation research, the modeling is based on the distributed control method and the behavior-based strategy. In this paper, some research to a few key issues has been carried out.展开更多
BACKGROUND In transradial intervention procedures,poor back-up support and noncoaxial alignment of the guide catheter(GC)may result in failure of the balloon or stent to reach the targeted lesion.Methods to provide ex...BACKGROUND In transradial intervention procedures,poor back-up support and noncoaxial alignment of the guide catheter(GC)may result in failure of the balloon or stent to reach the targeted lesion.Methods to provide extra back-up support using the original GC and wire can improve procedural success with reduced complications.A rapid exchange guide extension catheter provides convenient and efficient back-up support while preserving the initial GC and inserted wire.AIM To evaluate the efficacy and safety of rapid exchange extension catheter in the treatment of type B2/C nonocclusive coronary lesions via the radial access.METHODS A total of 135 patients with type B2/C nonocclusive lesions who were treated via the transradial approach were enrolled in the study.The clinical characteristics,indications for use of the rapid exchange extension catheter,and procedural details and results were reviewed and analyzed.All procedure-related complications and major adverse cardiovascular events were recorded during the in-hospital stay and follow-up period.RESULTS The most common indication for the use of a rapid exchange extension catheter was vascular tortuosity(37.8%),followed by heavy calcification(28.9%),long lesions(20.0%),proximal stent(6.7%),in-stent restenosis(5.2%),and coronary origin anomalies(1.5%).The following technologies failed in passing targeted lesions before delivering the rapid exchange catheter:Multiple predilatation technique(57%),buddy wire technique(33.4%),balloon anchoring technique (5.9%), and cutting balloon modification (3.7%). The mean depth of the extensioncatheter intubation was 20.56 ± 13.05 mm, and the mean rapid exchange catheterservice time was 18.9 ± 9.7 min. The mean length and diameter of stents were 33.5± 14.4 mm and 2.75 ± 0.45 mm, respectively. The total rate of technique success(balloon or stent successful crossing of the target lesion with this technique) was94.8%.CONCLUSIONThe rapid exchange extension catheter technique showed acceptable safety andefficacy in the transradial cor展开更多
文摘This paper aims to provide a design about a kind of low-cost ＂sub-mother＂ UAV small formation by using the low-cost micro-UAV as the platform. Combined with the current international situation in the UAV formation research, the modeling is based on the distributed control method and the behavior-based strategy. In this paper, some research to a few key issues has been carried out.
文摘BACKGROUND In transradial intervention procedures,poor back-up support and noncoaxial alignment of the guide catheter(GC)may result in failure of the balloon or stent to reach the targeted lesion.Methods to provide extra back-up support using the original GC and wire can improve procedural success with reduced complications.A rapid exchange guide extension catheter provides convenient and efficient back-up support while preserving the initial GC and inserted wire.AIM To evaluate the efficacy and safety of rapid exchange extension catheter in the treatment of type B2/C nonocclusive coronary lesions via the radial access.METHODS A total of 135 patients with type B2/C nonocclusive lesions who were treated via the transradial approach were enrolled in the study.The clinical characteristics,indications for use of the rapid exchange extension catheter,and procedural details and results were reviewed and analyzed.All procedure-related complications and major adverse cardiovascular events were recorded during the in-hospital stay and follow-up period.RESULTS The most common indication for the use of a rapid exchange extension catheter was vascular tortuosity(37.8%),followed by heavy calcification(28.9%),long lesions(20.0%),proximal stent(6.7%),in-stent restenosis(5.2%),and coronary origin anomalies(1.5%).The following technologies failed in passing targeted lesions before delivering the rapid exchange catheter:Multiple predilatation technique(57%),buddy wire technique(33.4%),balloon anchoring technique (5.9%), and cutting balloon modification (3.7%). The mean depth of the extensioncatheter intubation was 20.56 ± 13.05 mm, and the mean rapid exchange catheterservice time was 18.9 ± 9.7 min. The mean length and diameter of stents were 33.5± 14.4 mm and 2.75 ± 0.45 mm, respectively. The total rate of technique success(balloon or stent successful crossing of the target lesion with this technique) was94.8%.CONCLUSIONThe rapid exchange extension catheter technique showed acceptable safety andefficacy in the transradial cor
