Expandable introducer sheath to preserve guidewire access
An introducer sheath is described. The introducer sheath may include a tubular body. The tubular body may extend from a distal end toward a proximal end. The tubular body may include a lumen. The lumen may at least partially be defined by a wall. A channel may be disposed within the wall. The channel may be configured to receive a guidewire. The tubular body may include an expandable portion expandable to increase a cross-sectional area of the lumen.
1. A medical device comprising:
a hub portion with a port, a tapered distal end, and a hub lumen extending from the port to the tapered distal end; and
an elongate member extending from the hub portion, the elongate member comprising:
a plurality of elastic portions; and
a plurality of sheath portions that are stiffer than the plurality of elastic portions, the plurality of elastic portions and the plurality of sheath portions being disposed in alternating fashion circumferentially around the elongate member,
wherein, the plurality of elastic portions and the plurality of sheath portions extend into the tapered distal end of the hub portion.
2. The medical device of claim 1 , wherein the plurality of elastic portions are elastic strips extending from a distal end to towards a proximal end of the elongate member.
3. The medical device of claim 1 , wherein the plurality of elastic portions is configured to reduce in thickness upon expansion of the elongate member.
4. The medical device of claim 1 , wherein a sheath portion of the plurality of sheath portions comprises a radially extending surface, a circumferentially extending surface, and an inner circumferentially extending surface forming at least a portion of a lumen of the elongate member.
5. The medical device of claim 4 , wherein an elastic portion of the plurality of elastic portions overlaps the radially extending surface and the circumferentially extending surface.
6. The medical device of claim 4 , wherein an elastic portion of the plurality of elastic portions forms an outer surface of the elongate member.
7. The medical device of claim 1 , wherein each of the plurality of elastic portions has a uniform thickness.
8. The medical device of claim 1 , wherein each of the plurality of elastic portions is configured to stretch elastically along an arc that curves from a first surface of a wall of the elongate member to a second surface of the wall.
9. A method comprising: deploying a first medical device into a body lumen, the first medical device comprising: a device receiving hub portion with a port, a tapered distal end, a hub lumen extending from the port to the tapered distal end, and a valve; and an elongate member extending from the hub portion and forming a lumen extending to a distal end of the elongate member, the elongate member comprising: a plurality of elastic portions forming a surface of the lumen, wherein deformation of the plurality of elastic portions changes a shape of the surface of the lumen and an outer surface of the elongate member; and a plurality of sheath portions that are stiffer than the plurality of elastic portions, the plurality of elastic portions and the plurality of sheath portions being disposed in alternating fashion circumferentially around the elongate member, wherein the plurality of elastic portions and the plurality of sheath portions extend into the tapered distal end of the hub portion; and deploying a second medical device through the hub and the lumen of the elongate member.
10. The method as recited in claim 9 , wherein deploying the second medical device further comprises expanding the lumen from a first diameter to a second diameter.
11. The method as recited in claim 9 , wherein the second medical device comprises an expandable balloon.
12. The method as recited in claim 9 , wherein a sheath portion of the plurality of sheath portions comprises a radially extending surface, a circumferentially extending surface, and an inner circumferentially extending surface forming at least a portion of a lumen of the elongate member.
13. The method as recited in claim 9 , wherein an elastic portion of the plurality of elastic portions overlaps the radially extending surface and the circumferentially extending surface.
14. The method as recited in claim 9 , wherein an elastic portion of the plurality of elastic portions forms an outer surface of the elongate member.