Implant recovery device

摘要

The present invention provides a device for delivering and/or recovering an object, such as a patent foramen ovale (PFO) occluder. According to one embodiment of the invention, a device contains an outer sleeve and an inner sheath. The inner sheath has a proximal portion and a distal portion; the distal portion of the inner sheath is disposed inside the lumen of the outer sleeve. The distal portion of the inner sheath can expand radially to facilitate retrieval of an object. The distal portion of the inner sheath has a larger diametrical configuration than the proximal portion of the inner sheath. The distal portion of the inner sheath may be in the shape of a cone or similar shape. The distal portion of the inner sheath further includes slits that form flaps which collapse inward and overlap each other as the distal portion is in its unexpanded configuration.

主权项

1. A device for delivering or retrieving an object from a site within the body, comprising:
an outer sleeve having a lumen; and an inner sheath having a proximal portion and a distal portion, the distal portion being disposed within the lumen, the distal portion having an unexpanded configuration and an expanded configuration, and the distal portion having a first distal inner diameter and a second proximal inner diameter, the first distal inner diameter being larger than the second proximal inner diameter when in the expanded configuration; wherein the outer sleeve overlays at least a portion of the distal portion of the inner sheath when the device is in use, and wherein the outer sleeve extends beyond at least a portion of the distal portion of the inner sheath to form an overhang, wherein at least a portion of the outer sleeve is bonded to a portion of the inner sheath, the outer sleeve being elastic to permit expansion of the distal portion of the inner sheath when an object is drawn into the distal portion of the inner sheath, and the outer sleeve being operable to limit radial expansion of the distal portion of the inner sheath when an object is drawn into the distal portion of the inner sheath, and wherein the distal portion of the inner sheath includes at least two axial slits extending proximally from a distal end of the distal portion, the axial slits forming flaps that collapse inward and overlap each other when the distal portion is in the unexpanded configuration.