Stent delivery device
First Claim
1. A lockable treatment device delivery catheter comprising:
- an inner tube having proximal and distal ends;
a guidewire element carried within the inner tube and extending from the proximal end of the inner tube to the distal end of the inner tube;
a tip mounted over the inner tube at the distal end of the inner tube; and
a motion arresting device disposed about the guidewire element and movable in a proximal and distal direction, the motion arresting device having a pullwire extending therefrom in a proximal direction, the motion arresting device capable of frictionally engaging the tip of the catheter with the guidewire when the motion arresting device is moved in an axial direction to prevent proximal and/or distal motion of the tip when engaged.
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0 Petitions
Accused Products
Abstract
Inventive catheters are disclosed which employ a variety of devices for preventing unwanted motion of the catheter tip. These methods include the use of a slidably mounted annular shim located in the tip of the catheter which may frictionally engage the guidewire element, and an annular brush with bristles. In the later case, the extent of the frictional engagement between the tip and the guidewire is determined by the orientation of the bristles. The present invention is also directed to a catheter in which unwanted motion is prevented by the presence of a tension/compression cable extending from the proximal end of the catheter shaft to the distal end of the catheter shaft. In the unlocked position, the tension/compression cable has slack in it while in the engaged position, the cable is either under tension or under compression.
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Citations
23 Claims
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1. A lockable treatment device delivery catheter comprising:
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an inner tube having proximal and distal ends; a guidewire element carried within the inner tube and extending from the proximal end of the inner tube to the distal end of the inner tube; a tip mounted over the inner tube at the distal end of the inner tube; and a motion arresting device disposed about the guidewire element and movable in a proximal and distal direction, the motion arresting device having a pullwire extending therefrom in a proximal direction, the motion arresting device capable of frictionally engaging the tip of the catheter with the guidewire when the motion arresting device is moved in an axial direction to prevent proximal and/or distal motion of the tip when engaged. - View Dependent Claims (2, 3, 4, 5, 17)
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6. A lockable treatment device delivery catheter comprising:
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an inner tube having proximal and distal ends; a guidewire element carried within the inner tube and extending from the proximal end of the inner tube to the distal end of the inner tube; a tip mounted over the inner tube at the distal end of the inner tube, the tip having a proximal region characterized by an inner diameter and a intermediate region distal to and adjacent to the proximal region, the intermediate region having an inner diameter exceeding the inner diameter of the proximal region of the tip; and a motion arresting device frictionally engaging the tip of the catheter with the guidewire to prevent proximal and/or distal motion of the tip when engaged, the motion arresting device comprising a shim slidably mounted within the tip and concentrically about the guidewire element, the outer diameter of the shim exceeding or substantially equal to the inner diameter of the proximal region of the tip, the inner diameter of the shim substantially equal to the outer diameter of the guidewire element, the shim slidable from a position within the intermediate region of the tip to a position in which the shim engages the proximal region of the tip, the shim having a pullwire mounted thereon for sliding the shim, the shim pull wire extending to the proximal end of the catheter shaft, whereby the motion arresting device may be engaged by sliding the shim so that it lockingly engages the proximal region of the tip and at least a portion of the guidewire element. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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18. A lockable stent delivery catheter comprising:
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an inner tube having proximal and distal ends; a catheter shaft having proximal and distal ends, the inner tube carried within the catheter shaft and extending beyond the distal end of the catheter shaft; a guidewire element carried within the inner tube and extending from the proximal end of the inner tube to the distal end of the inner tube; a tip mounted over the inner tube at the distal end of the inner tube, the tip abutting the retractable sheath in the fully extended position, the tip having a proximal region characterized by an inner diameter and a intermediate region distal to and adjacent to the proximal region, the intermediate region having an inner diameter exceeding the inner diameter of the proximal region of the tip; a motion arresting device frictionally engaging the tip of the catheter with the guidewire to prevent proximal and/or distal motion of the tip when engaged, the motion arresting device comprising a shim slidably mounted within the tip and concentrically about the guidewire element, the outer diameter of the shim exceeding or substantially equal to the inner diameter of the proximal region of the tip, the inner diameter of the shim substantially equal to the outer diameter of the guidewire element, the shim slidable from a position within the intermediate region of the tip to a position in which the shim engages the proximal region of the tip, the shim having a pullwire mounted thereon for sliding the shim, the shim pull wire extending to the proximal end of the catheter shaft; a stent mounted over the distal end of the inner tube; and a retractable sheath slidably mounted on the distal end of the catheter shaft, the sheath retractable from a fully extended position in which the treatment device is covered by the retractable sheath and a fully retracted position in which the stent is exposed, whereby the motion arresting device may be engaged by sliding the shim so that it lockingly engages the proximal region of the tip and at least a portion of the guidewire element.
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19. A catheter comprising:
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a catheter shaft having a proximal end and a distal end, the catheter shaft having a guidewire lumen extending at least a portion of the way through the distal end of the catheter shaft, a tip located at the distal end of the catheter shaft, the tip having a proximal region and an intermediate region, the intermediate region distal to and adjacent to the proximal region, the tip having an opening extending therethrough to accommodate a guidewire, the diameter of the opening in the proximal region of the tip reduced relative to the diameter of the opening in the intermediate region of the tip; and a motion arresting device comprising a shim having a reducible diameter passage therethrough to accommodate a guidewire therethrough, the motion arresting device capable of frictionally engaging the tip of the catheter to a guidewire extending in the passage to prevent proximal and/or distal motion of the tip when engaged, the shim having a proximal end and a distal end, the shim sized to reside in the opening in the tip and movably mounted within the tip, the shim tapering toward the proximal end, at least a portion of the shim having a diameter in excess of the diameter of the opening in the tip in the proximal region of the tip, the shim having a pullwire mounted thereon for moving the shim, the shim pull wire extending to the proximal end of the catheter shaft, whereby on moving the shim proximally, the proximal portion of the tip applies a radially inward force to at least a portion of the shim thereby reducing the diameter of the passage in that portion of the shim. - View Dependent Claims (20, 21, 22, 23)
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Specification