HAO-MING HSIAO,LI-WEI WU,MING-TING YIN,CHENG-HAN LIN
申请号：
US14105736
公开号：
US20150073531A1
申请日:
2013.12.13
申请国别(地区):
US
年份:
2015
代理人:
摘要：
A drug eluting depot stent is provided. The stent has two free ends and a tubular body connected therebetween. The tubular body includes a series of rings having undulating structures. Each of the undulating structure has a bar arm and a crown connected thereto. The bar arm has a first end portion, a second end portion and a mid-section defined therebetween. The bar arm has opened regions defined at the first end portion, the mid-section, and the second end portion, respectively. The opening ratio of the mid-section is larger than that of the two end portions. With the aforementioned structure, the stress concentration at the crown region can be re-distributed towards the bar arm, and thus effectively prolonging the fatigue life of the stent.
