Apparatus and method for creating working channel through tissue
A minimally invasive medical device is provided. The device comprises an elongated member with proximal and distal ends, an inner radially expandable body surrounding the distal end of the elongated member, a stent surrounding the inner body, and an outer radially expandable body surrounding the stent. Optionally, the medical device further comprises a haemostatic coating surrounding the outer body. A method for treating tissue is also provided. The method comprises placing an elongated device into the tissue to create a path, radially expanding the device against the tissue to radially displace the tissue along the path, radially reinforcing the device against the tissue, and introducing a medical element through the device to perform a medical procedure on the tissue that can be image guided.
1 . A medical device, comprising:
an elongated member having a proximal end and a distal end;
a first radially expandable body surrounding the distal end of the member;
a stent surrounding the first body, wherein radial expansion of the first body radially expands the stent; and
a second radially expandable body surrounding the stent, wherein the first and second bodies are independently expandable.
2 . The device of claim 1 , wherein the distal end of the member is blunted.
3 . The device of claim 1 , wherein the first and second bodies are balloons.
4 . The device of claim 1 , wherein the first and second bodies expand elastically.
5 . The device of claim 1 , wherein the stent expands plastically.
6 . The device of claim 1 , wherein the second body is an annular balloon.
7 . The device of claim 1 , further comprising a haemostatic coating surrounding the second body.
8 . The device of claim 1 , wherein the first and second bodies and the stent extend along a majority length of the member.
9 . The device of claim 1 , wherein the elongated member and the first body are removable from the device.
10 . The device of claim 1 , wherein the elongated member is axially rigid.
11 . The device of claim 1 , further comprising an emitter, configured to send navigational signals.
12 . A method of treating a brain, comprising:
inserting an elongated device into the brain to create a path;
radially expanding the device to create a working channel along the path; and
introducing a medical element into the working channel to perform a medical procedure on the brain.
13 . The method of claim 12 , wherein the medical element is an instrument.
14 . The method of claim 12 , wherein the medical element is a medicament.
15 . The method of claim 12 , further comprising creating an opening in a cranium, and inserting the elongated device through the opening.
16 . The method of claim 12 , further comprising inserting the elongated device between tissue layers within the brain.
17 . The method of claim 12 , further comprising radially contracting and removing the device from the brain.
18 . A method of treating a tissue, comprising:
placing an elongated device into the tissue to create a path;
radially expanding the device against the tissue to radially displace the tissue along the path;
radially reinforcing the device against the tissue; and
introducing a medical element through the device to perform a medical procedure on the tissue.
19 . The method of claim 18 , wherein the medical element is an instrument.
20 . The method of claim 18 , wherein the medical element is a medicament.
21 . The method of claim 18 , further comprising inserting the elongated device between tissue layers.
22 . The method of claim 18 , further comprising radially contracting and removing the device from the tissue.
23 . The method of claim 18 , further comprising treating the tissue in contact with the device with a haemostatic compound to reduce bleeding.
24 . A method of treating a tissue, comprising:
placing an elongated device, having a first radially expandable body, surrounded by a stent, which is surrounded by a second radially expandable body, into the tissue to create a path;
radially expanding the second expandable body against the tissue to radially displace the tissue along the path;
radially expanding the first expandable body to radially expand the stent to reinforce the second expandable body against the tissue;
radially contracting and removing the first expandable body to create a working channel through the stent;
introducing a medical element through the channel to perform a medical procedure on the tissue; and
radially contracting the second expandable body and removing the device from the tissue.
25 . The method of claim 24 , wherein the medical element is an instrument.
26 . The method of claim 24 , wherein the medical element is a medicament.
27 . The method of claim 24 , further comprising inserting the elongated device between tissue layers.
28 . The method of claim 24 , further comprising treating the tissue in contact with the device with a haemostatic compound to reduce bleeding.