METHOD AND APPARATUS FOR PLACING A CATHETER WITHIN A VASCULATURE
First Claim
1. A catheter apparatus for insertion into vasculature of a patient and to a target area in the vasculature, comprising:
- a hollow inner shaft with a distal end and a proximal end;
a non-occluding self-expandable scaffold coupled to the distal end of the inner shaft and disposed at the distal end of the inner shaft, a portion of the distal end of the inner shaft being disposed at least in part inside the self-expandable scaffold; and
a hollow outer shaft with a distal end and a proximal end, the outer shaft being slidable over the inner shaft and the scaffold such that the scaffold is in a non-expanded state when the outer shaft is disposed around the scaffold, the outer shaft having a state where the distal end of the outer shaft remains near the target area without the inner shaft and the scaffold being disposed within the outer shaft,wherein the inner shaft and the scaffold are configured to be removable through the proximal end of the outer shaft while the distal end of the outer shaft remains near the target area.
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Accused Products
Abstract
A catheter for insertion into vasculature of a patient to a target area in the vasculature includes a hollow inner shaft, a non-occluding self-expandable scaffold coupled to the distal end of the inner shaft and disposed at the distal end of the inner shaft, and a hollow outer shaft. The outer shaft is slidable over the inner shaft and scaffold such that the scaffold is in a non-expanded state when the outer shaft is around the scaffold. The outer shaft has a state where the distal end of the outer shaft remains near the target area without the inner shaft and the scaffold being within the outer shaft. The inner shaft and the scaffold are removable through the proximal end of the outer shaft while the distal end of the outer shaft remains near the target area.
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Citations
25 Claims
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1. A catheter apparatus for insertion into vasculature of a patient and to a target area in the vasculature, comprising:
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a hollow inner shaft with a distal end and a proximal end; a non-occluding self-expandable scaffold coupled to the distal end of the inner shaft and disposed at the distal end of the inner shaft, a portion of the distal end of the inner shaft being disposed at least in part inside the self-expandable scaffold; and a hollow outer shaft with a distal end and a proximal end, the outer shaft being slidable over the inner shaft and the scaffold such that the scaffold is in a non-expanded state when the outer shaft is disposed around the scaffold, the outer shaft having a state where the distal end of the outer shaft remains near the target area without the inner shaft and the scaffold being disposed within the outer shaft, wherein the inner shaft and the scaffold are configured to be removable through the proximal end of the outer shaft while the distal end of the outer shaft remains near the target area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of using a catheter in a vessel of a patient for crossing a target area and providing support for a medical device, comprising:
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inserting a catheter into a vessel such that a distal end of the catheter approaches a target area in the vessel, the catheter comprising; a hollow shaft with a distal end and a proximal end, a non-occluding self-expandable scaffold disposed at the distal end of the catheter, wherein a portion of the distal end of the catheter is disposed at least in part inside the scaffold, and a sheath with a central lumen, a distal end having a distal opening, and a proximal end having a proximal opening, the sheath being slidable along the shaft, wherein the scaffold is configured to be coupled to the distal end of the catheter, and wherein the scaffold is in an un-expanded state when covered by the sheath; withdrawing the sheath to expand the self-expandable scaffold; moving the sheath and the scaffold structure relative to each other to position the sheath at least partially over the scaffold structure such that the scaffold returns to the un-expanded state; and withdrawing the hollow shaft and the scaffold through the proximal opening of the sheath, the sheath being adapted to remain in the vessel as a support catheter such that a medical device may be passed through the proximal opening of the sheath and advanced through the sheath to the target area near the distal end of the sheath. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification