Sheath system for autoperfusion dilatation catheter balloon
First Claim
1. A sheath for a catheter balloon of predetermined length and diameter and having a spiral axial pattern of lobes and channels which comprises:
- a generally tubular body having a central axis and having an inside diameter and length sized to fit over said spiral catheter balloon;
ends of said tubular body at least partially configured to correspond to end lobes of said spiral axial lobe pattern;
wherein a plurality of openings are formed in said tubular body at locations corresponding to said spiral balloon channels when placed on said balloon; and
wherein said ends of said tubular body have edges that include an integral bead.
1 Assignment
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Accused Products
Abstract
A sheath arrangement for spiral balloon catheters which permits improved perfusion during dilation of a body vessel. Methods of making the sheath and assembling the sheath onto a balloon and the resulting sheathed balloon catheter are included. A tube sized to fit over a spiral balloon is cut, preferably by laser cutting, to form ribs extending from the tube ends with collars at the distal ends of the ribs. Preferably, the tube ends are trimmed to match the balloon spiral lobes. The sheath is placed over the spiral balloon, bonded to the balloon lobes. The collars are secured to the catheter adjacent to the balloon. When the balloon is expanded to dilate a body vessel, blood can freely pass through the interlobe channels while the sheath prevents entry of arterial intima from entering into the channels. The rib and collar arrangement securely maintains the sheath in place on the balloon.
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Citations
16 Claims
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1. A sheath for a catheter balloon of predetermined length and diameter and having a spiral axial pattern of lobes and channels which comprises:
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a generally tubular body having a central axis and having an inside diameter and length sized to fit over said spiral catheter balloon; ends of said tubular body at least partially configured to correspond to end lobes of said spiral axial lobe pattern; wherein a plurality of openings are formed in said tubular body at locations corresponding to said spiral balloon channels when placed on said balloon; and wherein said ends of said tubular body have edges that include an integral bead.
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2. A sheath for a catheter balloon of predetermined length and diameter and having a spiral axial pattern of lobes and channels which comprises:
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a generally tubular body having a central axis and having an inside diameter and length sized to fit over said spiral catheter balloon; ends of said tubular body at least partially configured to correspond to end lobes of said spiral axial lobe pattern; and the sheath further including a rib extending from at least one end of said tubular body generally parallel to said central axis and a collar secured to a distal end of said rib and sized to fit around said catheter adjacent to said balloon. - View Dependent Claims (3, 4)
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5. A sheath for a spiral catheter balloon which comprises:
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a generally tubular body having a central axis and having an inside diameter sized to fit over a spiral catheter balloon of predetermined outside diameter connected to a catheter; said tubular body having at least one open end; a rib extending from said open end of said tubular body generally parallel to said central axis; and a collar secured to a distal end of said rib and sized to wrap around said catheter adjacent to said balloon. - View Dependent Claims (6, 7, 8, 9)
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10. A balloon catheter assembly for use in medical procedures which comprises:
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a catheter including a longitudinal lumen for delivery of a pressurized fluid therethrough; a balloon on said catheter and sealed thereto for receiving said fluid and for inflation thereby; said catheter extending entirely through said balloon; said balloon having a spiral configuration comprising at least one outwardly extending spiral lobe separated by an inwardly extending channel; said balloon channel secured to said catheter; a generally tubular sheath overlying said balloon in stretched contact therewith when said balloon is inflated; said tubular sheath bonded to said spiral lobe at predetermined locations; said tubular sheath having ends, at least a portion of each end configured to correspond to said lobe at each end of said balloon and bonded thereto. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification