Expandable percutaneous sheath
First Claim
Patent Images
1. A percutaneous access sheath assembly comprising:
- an elongate tubular structure, a first portion of said elongate tubular structure being expandable from a first cross-sectional profile to a second cross-sectional profile;
a releaseable sheath further comprising;
a proximal end;
a restraint section;
a distal end; and
a first tapering point located at a transition between said proximal end and said restraint section, said first tapering point causing a reduction in the cross-sectional profile of said releasable sheath to a smaller cross-sectional profile of said restraint section and wherein said restraint section restrains at least a portion of said first portion in said first cross-sectional profile; and
a balloon positionable inside said elongate tubular structure, wherein inflation of the balloon causes at least a portion of said first portion to expand said restraint section of the releasable sheath to tear, and the balloon is removable from said elongate tubular structure after it has expanded and at least partially deflated;
wherein the first tapering point is present before said balloon is inflated.
6 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is an expandable percutaneous sheath, for introduction into the body while in a first, low cross-sectional area configuration, and subsequent expansion to a second, enlarged cross-sectional configuration. The sheath is maintained in the first, low cross-sectional configuration by a removable tubular restraint. In one application, the sheath is utilized to introduce a formed in place orthopedic fixation rod such as for use in spinal fixation procedures.
92 Citations
32 Claims
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1. A percutaneous access sheath assembly comprising:
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an elongate tubular structure, a first portion of said elongate tubular structure being expandable from a first cross-sectional profile to a second cross-sectional profile; a releaseable sheath further comprising; a proximal end; a restraint section; a distal end; and a first tapering point located at a transition between said proximal end and said restraint section, said first tapering point causing a reduction in the cross-sectional profile of said releasable sheath to a smaller cross-sectional profile of said restraint section and wherein said restraint section restrains at least a portion of said first portion in said first cross-sectional profile; and a balloon positionable inside said elongate tubular structure, wherein inflation of the balloon causes at least a portion of said first portion to expand said restraint section of the releasable sheath to tear, and the balloon is removable from said elongate tubular structure after it has expanded and at least partially deflated; wherein the first tapering point is present before said balloon is inflated. - View Dependent Claims (2)
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3. A surgical access assembly comprising:
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a percutaneous access sheath, the percutaneous access sheath comprising a first longitudinal portion and a second longitudinal portion, the first longitudinal portion having an inner layer and an outer layer, the second longitudinal portion having only the inner layer, the inner layer extending longitudinally out and away from the outer layer at the intersection of the first longitudinal portion and the second longitudinal portion, the inner layer being folded into a reduced cross-sectional profile along at least part of the length of the second longitudinal portion; a removable insertion sheath surrounding at least part of the second longitudinal portion, the removable insertion sheath further comprising; a proximal section; a restraint section; a distal section; and a first tapering point located at a transition between said proximal section and said restraint section, said first tapering point causing a reduction in the cross-sectional profile of said removable insertion sheath to a smaller cross-sectional profile of said restraint section and wherein said restraint section retains a portion of the inner layer in its reduced cross-sectional profile, the removable insertion sheath being removable from the percutaneous access sheath by the surgeon after insertion of the percutaneous access sheath and the removable insertion sheath into the patient; and a balloon longitudinally positionable by the surgeon inside the percutaneous access sheath, the balloon positioned inside the second longitudinal portion and inflatable to a cross-sectional profile that tears at least a portion of the removable insertion sheath and exceeds the reduced cross-sectional profile of the inner layer; wherein the first tapering point is present before said balloon is inflated. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A surgical access assembly comprising:
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a percutaneous access sheath, the percutaneous access sheath comprising a first longitudinal portion and a second longitudinal portion, the second longitudinal portion being expandable from a first, reduced cross-sectional profile to a second, greater cross-sectional profile; a removable insertion sheath surrounding at least part of the second longitudinal portion, the removable insertion sheath further comprising; a proximal section; a restraint section; a distal section; and a first tapering point located at a transition between said proximal section and said restraint section, said first tapering point causing a reduction in the cross-sectional profile of said removable insertion sheath to a smaller cross-sectional profile of said restraint section and wherein said restraint section retains the second longitudinal portion in its first, reduced cross-sectional profile, the removable insertion sheath being removable from the percutaneous access sheath by the surgeon after insertion of the percutaneous access sheath and the removable insertion sheath into the patient; and a balloon longitudinally positionable by the surgeon inside the percutaneous access sheath, the balloon positioned inside the second longitudinal portion and inflatable to a cross-sectional profile that tears at least a portion of the removable access sheath and exceeds the second, reduced cross-sectional profile of the second longitudinal portion; wherein the first tapering point is present before said balloon is inflated.
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14. A surgical access assembly comprising:
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a percutaneous access sheath, the percutaneous access sheath comprising a first longitudinal portion and a second longitudinal portion, the first longitudinal portion having an inner layer and an outer layer, the second longitudinal portion having only the inner layer, the inner layer extending longitudinally out and away from the outer layer at the intersection of the first longitudinal portion and the second longitudinal portion, the inner layer being folded into a reduced cross-sectional profile along at least part of the length of the second longitudinal portion; a removable insertion sheath surrounding at least part of the second longitudinal portion, the removable insertion sheath further comprising; a proximal section; a restraint section; a distal section; and a first tapering point located at a transition between said proximal section and said restraint section, said first tapering point causing a reduction in the cross-sectional profile of said removable insertion sheath to a smaller cross-sectional profile of said restraint section and wherein said restraint section retains a portion of the inner layer in its reduced cross-sectional profile, the removable insertion sheath being removable from the percutaneous access sheath by the surgeon after insertion of the percutaneous access sheath and the removable insertion sheath into the patient; and a balloon longitudinally positionable by the surgeon inside the percutaneous access sheath, the balloon having a length substantially equal to about a length of the second longitudinal portion, the balloon positioned inside the second longitudinal portion and inflated to a cross-sectional profile that exceeds the reduced cross-sectional profile of the inner layer; wherein the first tapering point is present before said balloon is inflated.
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15. A surgical access assembly for use in percutaneous spinal surgery comprising:
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a percutaneous access sheath having a first portion and a second portion, the first portion having an inner layer and an outer layer, the second portion having the inner layer, the inner layer extending longitudinally from the outer layer at an intersection of the first portion and the second portion, the inner layer adapted to have a first cross-sectional profile along at least part of a length of the second portion; an insertion sheath releasably housing at least a portion of the second portion, the insertion sheath further comprising; a proximal section; a restraint section; a distal section; and a first tapering point located at a transition between said proximal section and said restraint section, said first tapering point causing a reduction in the cross-sectional profile of said insertion sheath to a smaller cross-sectional profile of said restraint section and wherein said restraint section retains a portion of the inner layer in the first cross-sectional profile, the insertion sheath being removable from the percutaneous access sheath after insertion of the surgical access assembly into a patient during percutaneous spinal surgery; and an inflatable member positionable inside the percutaneous access sheath, the inflatable member positioned inside the second portion and inflated to a second cross-sectional profile wherein said second cross-sectional profile is greater than said first cross-sectional profile; wherein the first tapering point is present before said inflatable member is inflated. - View Dependent Claims (16, 17, 18, 19)
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20. A surgical access assembly for use in percutaneous spinal surgery comprising:
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a percutaneous access sheath having a first portion and a second portion, the first portion having an inner layer and an outer layer, the second portion having the inner layer, the inner layer extending longitudinally from the outer layer at an intersection of the first portion and the second portion, the inner layer adapted to have a first cross-sectional profile along at least part of a length of the second portion; an insertion sheath releasably housing at least a portion of the second portion, the insertion sheath further comprising; a proximal section; a restraint section; a distal section; and a first tapering point located at a transition between said proximal section and said restraint section, said first tapering point causing a reduction in the cross-sectional profile of said insertion sheath to a smaller cross-sectional profile of said restraint section and wherein said restraint section retains a portion of the inner layer in the first cross-sectional profile, the insertion sheath being removable from the percutaneous access sheath after insertion of the surgical access assembly into a patient during percutaneous spinal surgery; a deployment catheter positionable inside the percutaneous access sheath, the deployment catheter having an inflatable member and a guide wire lumen, the inflatable member of the deployment catheter positioned inside the second portion and inflated to a second cross-sectional profile wherein said second cross-sectional profile is greater than.said first cross-sectional profile; and a guide wire positioned in the guide wire lumen, where the surgical access assembly is movable along the guide wire to be directed to a surgical site in the patient; wherein the first tapering point is present before said inflatable member is inflated.
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21. A surgical access assembly for use in percutaneous spinal surgery comprising:
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a percutaneous access sheath having a first portion and a second portion, the first portion having an inner layer and an outer layer, the second portion having the inner layer, the inner layer extending longitudinally from the outer layer at an intersection of the first portion and the second portion, the inner layer adapted to have a first cross-sectional profile along at least part of a length of the second portion; an insertion sheath releasably housing at least a portion of the second portion, the releasable sheath having at least one perforation, the insertion sheath further comprising; a proximal section; a restraint section; a distal section; and a first tapering point located at a transition between said proximal section and said restraint section, said first tapering point causing a reduction in the cross-sectional profile of said insertion sheath to a smaller cross-sectional profile of said restraint section and wherein said restraint section retains a portion of the inner layer in the first cross-sectional profile; and an inflatable member positionable inside the percutaneous access sheath, the inflatable member positioned inside the second portion and inflated to a second cross-sectional profile wherein said second cross-sectional profile is greater than said first cross-sectional profile; wherein the first tapering point is present before said inflatable member is inflated. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A surgical access assembly comprising:
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a percutaneous access sheath having a first portion and a second portion, the first portion having an inner layer and an outer layer, the second portion having the inner layer, the inner layer extending longitudinally from the outer layer at an intersection of the first portion and the second portion, the inner layer adapted to have a first cross-sectional profile along at least part of a length of the second portion; an insertion sheath releasably housing at least a portion of the second portion, the insertion sheath further comprising; a proximal section; a restraint section; a distal section; and a first tapering point located at a transition between said proximal section and said restraint section, said first tapering point causing a reduction in the cross-sectional profile of said insertion sheath to a smaller cross-sectional profile of said restraint section and wherein said restraint section retains a portion of the inner layer in the first cross-sectional profile, the insertion sheath being removable from the percutaneous access sheath after insertion of the surgical access assembly into a patient; a deployment catheter positionable inside the percutaneous access sheath, the deployment catheter having an inflatable member and a guide wire lumen, the inflatable member of the deployment catheter positioned inside the second portion and inflated to a second cross-sectional profile wherein said second cross-sectional profile is greater than said first cross-sectional profile; and a guide wire positioned in the guide wire lumen, where the surgical access assembly is movable along the guide wire to be directed to a surgical site in the patient; wherein the first tapering point is present before said inflatable member is inflated.
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28. A surgical access assembly:
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a percutaneous access sheath having a first portion and a second portion, the first portion having an inner layer and an outer layer, the second portion having the inner layer, the inner layer extending longitudinally from the outer layer at an intersection of the first portion and the second portion, the inner layer adapted to have a first cross-sectional profile along at least part of a length of the second portion; an insertion sheath releasably housing at least a portion of the second portion, the releasable sheath having at least one perforation, the insertion sheath further comprising; a proximal section; a restraint section; a distal section; and a first tapering point located at a transition between said proximal section and said restraint section, said first tapering point causing a reduction in the cross-sectional profile of said insertion sheath to a smaller crass-sectional profile of said restraint section and wherein said restraint section retains a portion of the inner layer in the first cross-sectional profile; and an inflatable member positionable inside the percutaneous access sheath, the inflatable member positioned inside the second portion and inflated to a second cross-sectional profile wherein said second cross-sectional profile is greater than said first cross-sectional profile; wherein the first tapering point is present before said inflatable member is inflated. - View Dependent Claims (29, 30, 31, 32)
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Specification