Systems, devices and methods for accessing a bodily opening

摘要

Medical systems, devices and methods are provided for accessing a bodily opening that, among other things, are safe and reliable, and facilitate manipulation of a medical instrument. The medical access device generally includes an elongated flexible sheath and an expandable frame connected to the distal end of the flexible sheath. The sheath and expandable frame are operable between expanded and collapsed configurations to provide a pathway from a natural orifice to the bodily opening. Medical systems and methods are also provided for delivering the medical device.

主权项

1. A medical device for forming a longitudinal pathway from an external orifice to a bodily opening having a length and a diameter defined by tissue of an internal bodily lumen, the medical device comprising:
an expandable member operable between a collapsed configuration and an expanded configuration, the expandable member having a proximal end and a distal end; and a flexible sheath having a length suitable for forming the pathway, the flexible sheath including a proximal portion and a distal portion, the distal portion of the sheath connected to the expandable member, the proximal portion of the sheath not connected to the expandable member, the sheath collapsible over a substantial portion of its length and operable between a collapsed configuration and an expanded configuration; wherein the expandable member includes first, second and third cages, and wherein the first and third cages are stents, and wherein the second cage comprises a plurality of strands extending longitudinally between the first and third cages to connect the cages and space the cages apart, the first and third cage configured to have an outer diameter larger than the diameter of the bodily opening in an expanded configuration of the stents, the plurality of strands of the second cage configured to have a length greater than the length of the bodily opening.