Methods for puncturing an expandable member to confirm advancement into a body passage
View Patent ↗A device includes a first end portion, a second end portion, an intermediate portion, and a graft material. The first end portion has a first end diameter. The second end portion has a second end diameter smaller than the first end diameter. The first end portion comprises a first material. The second end portion comprises a second material different than the first material. The intermediate portion is between the first end portion and the second end portion. The intermediate portion tapers between the first end portion and the second end portion. The graft material is coupled to at least the intermediate portion.
1. A method of targeting a second passage from a first passage to effect retroperfusion in the second passage, the method comprising:
expanding an expandable device in the second passage, the expandable device comprising a balloon;
advancing a needle from a first catheter in the first passage out of the first passage and into the second passage to form a fistula between the first passage and the second passage, wherein advancing the needle comprises puncturing the expandable device;
monitoring the needle puncturing the balloon to confirm advancement of the needle into the second passage; and
advancing a guidewire from the first passage, through the needle, and into the expandable device, wherein collapsing of the expandable device closes around the guidewire to grip the guidewire in the second passage.
2. The method of claim 1 , wherein the expandable device comprises radiopaque material visible under fluoroscopy, and wherein advancing the needle comprises targeting the expandable device under fluoroscopy.
3. The method of claim 1 , further comprising:
injecting contrast in the second passage; and
monitoring the contrast using fluoroscopy,
wherein disturbance of the contrast is attributable to the needle puncturing the expandable device and confirms advancement of the needle into the second passage.
4. The method of claim 1 , wherein the first catheter comprises an Outback needle catheter.
5. The method of claim 1 , further comprising making a valve in the second passage incompetent to reduce inhibition of retroperfusion through the second passage by the valve.
6. The method of claim 5 , wherein making the valve in the second passage incompetent comprises using a cutting balloon or valvulotome.
7. The method of claim 1 , further comprising deploying a stent graft,
wherein deploying the stent graft comprises balloon expanding the stent graft, and
wherein, after deploying the stent graft, a first portion of the stent graft is in the first passage, a second portion of the stent graft is in the second passage, and a third portion of the stent graft is in the fistula.
8. The method of claim 1 , further comprising:
making a valve in the second passage incompetent to reduce inhibition of retroperfusion through the second passage by the valve, wherein making the valve in the second passage incompetent comprises using a cutting balloon or valvulotome; and
balloon expanding a stent graft, wherein, after balloon expanding the stent graft, a first portion of the stent graft is in the first passage, a second portion of the stent graft is in the second passage, and a third portion of the stent graft is in the fistula,
wherein the first passage comprises an artery,
wherein the second passage comprises a vein,
wherein the expandable device comprises radiopaque material visible under fluoroscopy,
wherein advancing the needle comprises targeting the expandable device under fluoroscopy, and
wherein advancing the needle comprises traversing the needle through interstitial tissue after advancing the needle out of the first passage and prior to advancing the needle into the second passage.
9. A method of targeting a second passage from a first passage to effect retroperfusion in the second passage, the method comprising:
expanding an expandable device in the second passage, the expandable device comprising a balloon;
advancing a needle from a first catheter in the first passage out of the first passage and into the second passage to form a fistula between the first passage and the second passage,
wherein advancing the needle comprises puncturing the expandable device, and
wherein puncturing of the expandable device is attributable to the needle puncturing the balloon and confirms advancement of the needle into the second passage;
making a valve in the second passage incompetent to reduce inhibition of retroperfusion through the second passage by the valve; and
deploying a prosthesis,
wherein, after deploying the prosthesis, a first portion of the prosthesis is in the first passage, a second portion of the prosthesis is in the second passage, and a third portion of the prosthesis is in the fistula.
10. The method of claim 9 , wherein advancing the needle comprises traversing the needle through interstitial tissue after advancing the needle out of the first passage and prior to advancing the needle into the second passage.
11. The method of claim 9 , wherein deploying the prosthesis comprises balloon expanding a stent graft.
12. The method of claim 9 , wherein making the valve in the second passage incompetent comprises using a cutting balloon or valvulotome.
13. The method of claim 9 , further comprising:
injecting contrast in the second passage; and
monitoring the contrast using fluoroscopy,
wherein disturbance of the contrast attributable to the needle puncturing the expandable device confirms advancement of the needle into the second passage.
14. The method of claim 9 , further comprising making a valve in the second passage incompetent to reduce inhibition of retroperfusion through the second passage by the valve,
wherein making the valve in the second passage incompetent comprises using a cutting balloon,
wherein the first passage comprises an artery,
wherein the second passage comprises a vein,
wherein deploying the prosthesis comprises balloon expanding the prosthesis, and
wherein advancing the needle comprises traversing the needle through interstitial tissue after advancing the needle out of the first passage and prior to advancing the needle into the second passage.
15. A method of targeting a second passage from a first passage to effect retroperfusion in the second passage, the method comprising:
expanding an expandable device in the second passage, the expandable device comprising a balloon, wherein the expandable device comprises radiopaque material visible under fluoroscopy; and
advancing a needle from a first catheter in the first passage out of the first passage and into the second passage to form a fistula between the first passage and the second passage,
wherein advancing the needle comprises:
targeting the expandable device under fluoroscopy;
puncturing the expandable device; and
monitoring at least one of reduction in pressure of the expandable device and release of contrast from the expandable device;
wherein the at least one of the reduction in pressure of the expandable device and the release of contrast from the expandable device is attributable to the needle puncturing the expandable device and confirms advancement of the needle into the second passage.
16. The method of claim 15 , further comprising:
injecting contrast in the second passage; and
monitoring the contrast using fluoroscopy,
wherein disturbance of the contrast attributable to the needle puncturing the expandable device confirms advancement of the needle into the second passage.
17. The method of claim 15 , further comprising making a valve in the second passage incompetent to reduce inhibition of retroperfusion through the second passage by the valve.
18. The method of claim 17 , wherein making the valve in the second passage incompetent comprises using a cutting balloon or valvulotome.
19. The method of claim 15 , further comprising deploying a prosthesis,
wherein deploying the prosthesis comprises balloon expanding a stent graft, and
wherein, after deploying the prosthesis, a first portion of the prosthesis is in the first passage, a second portion of the prosthesis is in the second passage, and a third portion of the prosthesis is in the fistula.
20. The method of claim 19 , further comprising:
making a valve in the second passage incompetent to reduce inhibition of retroperfusion through the second passage by the valve, wherein making the valve in the second passage incompetent comprises using a cutting balloon or valvulotome,
balloon expanding a stent graft, wherein, after balloon expanding the stent graft, a first portion of the stent graft is in the first passage, a second portion of the stent graft is in the second passage, and a third portion of the stent graft is in the fistula,
wherein the first passage comprises an artery,
wherein the second passage comprises a vein,
wherein the expandable device comprises radiopaque material visible under fluoroscopy,
wherein advancing the needle comprises targeting the expandable device under fluoroscopy, and
wherein advancing the needle comprises traversing the needle through interstitial tissue after advancing the needle out of the first passage and prior to advancing the needle into the second passage.