| 摘要 |
A repositionable closure device for occluding a body opening is provided. The closure device includes distal and proximal occluding bodies having expandable distal and proximal umbrella frames. Each umbrella frame includes a plurality of struts connected to a biocompatible sheet material. The distal and proximal umbrella frames expand to expanded configurations on opposite sides of the body opening. The struts of the distal umbrella frame terminate with an eyelet. The distal occluding body is connected to a distal end of a center rod and the proximal umbrella frame is slidable along the center rod via a center ring. At least one drawstring is threaded through the eyelets and the center ring, connecting the distal and proximal occluding bodies. The drawstring extends proximally from the center ring. Manipulation of the drawstring and the center rod is configured to collapse the closure device for at least partial retrieval during repositioning.
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