Expandable retrieval device with dilator tip
Devices and systems for retrieving an intravascular device within a body lumen are disclosed. The retrieval device may comprise an elongated tubular member having a relatively stiff proximal segment, an expandable distal segment, and an inner lumen disposed about a guidewire. The distal segment may include a braid configured to expand when axially compressed. A dilator tip operatively coupled to the elongated tubular member and guidewire may be used to track the retrieval device through the body.
1 . A medical device, comprising:
an elongated tubular member having a proximal segment, a distal segment, and an inner lumen disposed at least partially therethrough, the distal segment configured to radially expand when axially compressed; and
a dilator tip insertable at least in part within the distal segment.
2 . The medical device of claim 1 , wherein the proximal segment varies in thickness along its length.
3 . The medical device of claim 1 , wherein the distal segment includes a braid.
4 . The medical device of claim 1 , wherein the dilator tip has a generally circular transverse cross-sectional area.
5 . The medical device of claim 1 , wherein the dilator tip has a proximal section, a distal section, and an inner lumen disposed therethrough.
6 . The medical device of claim 5 , wherein the proximal section of said dilator tip is configured to tightly fit within the distal segment.
7 . The medical device of claim 5 , wherein the distal section of said dilator tip is distally tapered.
8 . The medical device of claim 1 , wherein the elongated tubular member is configured to radially expand and encompass an intravascular device therein.
9 . The medical device of claim 8 , wherein the intravascular device is an embolic protection filter.
10 . The medical device of claim 1 , wherein the elongated tubular member is configured for use over-the-wire.
11 . The medical device of claim 1 , wherein the elongated tubular member is configured for single operator exchange.
12 . A medical device, comprising:
an elongated tubular member having a proximal segment, a distal segment, and an inner lumen disposed at least partially therethrough, the distal segment including a braid configured to radially expand when axially compressed; and
a dilator tip insertable at least in part within the distal segment.
13 . The medical device of claim 12 , wherein the proximal segment varies in thickness along its length.
14 . The medical device of claim 12 , wherein the dilator tip has a generally circular transverse cross-sectional area.
15 . The medical device of claim 12 , wherein the dilator tip has a proximal section, a distal section, and an inner lumen disposed therethrough.
16 . The medical device of claim 15 , wherein the proximal section of said dilator tip is configured to tightly fit within the distal segment.
17 . The medical device of claim 15 , wherein the distal section of said dilator tip is distally tapered.
18 . The medical device of claim 12 , wherein the elongated tubular member is configured to radially expand and encompass an intravascular device therein.
19 . The medical device of claim 18 , wherein the intravascular device is an embolic protection filter.
20 . The medical device of claim 12 , wherein the elongated tubular member is configured for use over-the-wire.
21 . The medical device of claim 12 , wherein the elongated tubular member is configured for single operator exchange.
22 . A medical device, comprising:
an elongated tubular member having a proximal segment, a distal segment, and an inner lumen disposed at least partially therethrough, the distal segment configured to radially expand when axially compressed; and
a dilator tip insertable at least in part within the distal segment, the dilator tip having a proximal section configured to tightly fit within the distal segment, a distal section, and an inner lumen disposed therethrough.
23 . The medical device of claim 22 , wherein the proximal segment varies in thickness along its length.
24 . The medical device of claim 22 , wherein the distal segment includes a braid.
25 . The medical device of claim 22 , wherein the dilator tip has a generally circular transverse cross-sectional area.
26 . The medical device of claim 22 , wherein the distal section of said dilator tip is distally tapered.
27 . The medical device of claim 22 , wherein the elongated tubular member is configured to radially expand and encompass an intravascular device therein.
28 . The medical device of claim 27 , wherein the intravascular device is an embolic protection filter.
29 . The medical device of claim 22 , wherein the elongated tubular member is configured for use over-the-wire.
30 . The medical device of claim 22 , wherein the elongated tubular member is configured for single operator exchange.
31 . A system for retrieving an intravascular device disposed within a body lumen, comprising:
an embolic protection filter disposed about an elongated wire;
a retrieval device configured to radially expand and encompass the intravascular filter therein, said retrieval device comprising an elongated tubular member having a proximal segment, a distal segment, and an inner lumen adapted to slidably receive the elongated wire; and
a dilator tip insertable at least in part within the distal segment, said dilator tip configured to engage a stop disposed about the elongated wire.
32 . A system for retrieving an intravascular device disposed within a body lumen, comprising:
an embolic protection filter disposed about an elongated wire;
a retrieval device configured to radially expand an encompass the intravascular filter therein, said retrieval device comprising an elongated tubular member having a proximal segment, a distal segment, and an inner lumen adapted to slidably receive the elongated wire; and
a dilator tip insertable at least in part within the distal segment, the dilator tip including a proximal section configured to tightly fit within the distal segment, a distal section configured to engage a stop disposed about the elongated wire, and an inner lumen disposed therethrough configured to slidably receive the elongated wire.