| 摘要 |
A medical device includes a shaft having a distal end and a distal tip. An anchor mechanism is coupled to the distal end proximal to the distal tip. The anchor mechanism includes a rolled sheet of material and a sleeve located to surround the rolled sheet of material to maintain the rolled sheet of material in an initial rolled configuration, and is configured such that when the sleeve is retracted, the rolled sheet of material unrolls to expand radially to anchor the medical device. |
