Expandable sheath and methods of using the same
First Claim
1. An expandable sheath comprising:
- an elongated inner member including at least one foldable axial portion;
an outer elastomeric member extending at least partially over the elongated inner member and configured to exert a compressive force onto the elongated inner member to bias the at least one foldable axial portion into a folded configuration; and
a proximal seal including a middle member extending from an outer surface of the elongated inner member to an inner surface of the outer elastomeric member, the proximal seal configured to guard against proximal migration of fluid from a distal free end of the expandable sheath to a proximal end of the expandable sheath;
wherein the elongated inner member defines a central lumen, a first circumferential portion including first and second longitudinal edges, and a second circumferential portion extending between the first and second longitudinal edges;
wherein the elongated inner member is configured to crease at the first and second longitudinal edges into the folded configuration such that the first and second longitudinal edges overlap, wherein the second circumferential portion is positioned at least partially between the first and second longitudinal edges when overlapped;
wherein the elongated inner member further includes a distal tip, the distal tip including a flap extending from the first longitudinal edge and at least to the second longitudinal edge in an open configuration of the elongated inner member.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed herein are expandable introducer sheaths and methods of making and using the same. The sheaths minimize trauma to a patient'"'"'s vasculature by allowing for temporary expansion of a portion of the sheath to accommodate passage of a delivery system for an implant, then return to a non-expanded state after the passage of the device. The sheath includes a foldable inner member having a detached flap structure at its distal tip that facilitates expansion of the sheath lumen to increased diameters, and an elastomeric distal end that reduces push and retrieval forces therethrough. The sheath can include a hemostasis seal on its proximal end to prevent the leakage of blood out of the sheath and prevent ballooning of outer layer of the sheath.
-
Citations
21 Claims
-
1. An expandable sheath comprising:
-
an elongated inner member including at least one foldable axial portion; an outer elastomeric member extending at least partially over the elongated inner member and configured to exert a compressive force onto the elongated inner member to bias the at least one foldable axial portion into a folded configuration; and a proximal seal including a middle member extending from an outer surface of the elongated inner member to an inner surface of the outer elastomeric member, the proximal seal configured to guard against proximal migration of fluid from a distal free end of the expandable sheath to a proximal end of the expandable sheath; wherein the elongated inner member defines a central lumen, a first circumferential portion including first and second longitudinal edges, and a second circumferential portion extending between the first and second longitudinal edges; wherein the elongated inner member is configured to crease at the first and second longitudinal edges into the folded configuration such that the first and second longitudinal edges overlap, wherein the second circumferential portion is positioned at least partially between the first and second longitudinal edges when overlapped; wherein the elongated inner member further includes a distal tip, the distal tip including a flap extending from the first longitudinal edge and at least to the second longitudinal edge in an open configuration of the elongated inner member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An expandable sheath comprising:
-
an elongated inner member defining a central lumen, a first circumferential portion including a first and a second longitudinal edge, and a second circumferential portion extending between the first and second longitudinal edges, wherein the elongated inner member is configured to crease at the first and second longitudinal edges into a folded configuration such that the first and second longitudinal edges overlap, wherein the second circumferential portion is positioned at least partially between the first and second longitudinal edges when overlapped; and an outer elastomeric member extending around the elongated inner member and configured to bias the elongated inner member into the folded configuration; wherein the elongated inner member further includes a distal tip, the distal tip including a flap extending from the first longitudinal edge and at least to the second longitudinal edge in an open configuration of the elongated inner member. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
Specification