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1. (WO1988005671) MEDICAL SLEEVE
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WHAT IS CLAIMED IS:

1. An intravascular method of treating a ruptured artery comprising the steps of locating the area of the rupture, isolating the area of hemorrhage by sealing proximal and distal sites in the area, suctioning clotted blood hemorrhaged from the rupture into the artery through one of the sealed sites, implanting an artificial sleeve in the artery by introducing it intravascularly in a configuration of sufficiently small size to pass freely within the artery from a site remote from the rupture, permanently expanding the sleeve in the artery at the area of the ruptured artery wall, and allowing the expanded sleeve to remain in the artery indefinitely to conduct blood flowing through the artery and prevent loss of such blood flow through the ruptured wall area.

2. A method as set forth in claim 1, wherein the distal and proximal sites are sealed by expanding intravascularly introduced balloon means therein.

3. A method as set forth in claim 1, wherein a bypass conduit is temporarily intravascularly introduced to conduct blood flow between opposite sides of said sites.

4. A method as set forth in claim 1, wherein the sleeve is formed of a material which increases in rigidity after being expanded in place within the artery.

5. A method as set forth in claim 1, wherein blood clot dissolving agent is injected to the blood mass surrounding the ruptured artery wall prior to and/or during evacuation of blood from the homorrhaged area.

6. A method as set forth in claim 5, wherein said blood clot dissolving agent is injected intravascularly.

7. A method of treating an area of a body vessel, comprising the steps of:
introducing a catheter with a collapsed inflatable annular balloon and a collapsed sleeve encircling the balloon on its end into the vessel at a point remote from the area to be treated;
manipulating the catheter axially along the vessel to cause the balloon and sleeve to enter the area to be treated;
inflating the balloon by introducing fluid under pressure into the balloon through a tube of the catheter in a manner wherein the sleeve surrounding the balloon is radially expanded towards the wall of the vessel;
providing in the sleeve a material which increases in rigidity after expansion of said balloon;
maintaining said balloon in an expanded condition in the vessel while said sleeve increases in rigidity and body fluid is allowed to pass through the central aperture of the balloon; and
thereafter removing the balloon and catheter from the vessel and allowing the sleeve to remain in place in the area to be treated.

8. A method of treating an area of a body vessel, comprising the steps of:
introducing a catheter with a collapsed inflatable balloon and a collapsed sleeve encircling the balloon on its end into the vessel at a point remote from the area to be treated;
manipulating the catheter axially along the vessel to cause the balloon and sleev to enter the area to be treated;
inflating the balloon by introducing fluid under pressure into the balloon through a tube of the catherter in a manner wherein the sleeve surrounding the balloon is radially expanded towards the wall of the vessel;
providing in the sleeve a material which increases in rigidity after expansion of said balloon;
maintaining said balloon in an expanded condition in the vessel while said sleeve increases in rigidity; and
thereafter removing the balloon and catheter from the vessel and allowing the sleeve to remain in place in the area to be treated.