Rapid exchange pre-dilator
First Claim
Patent Images
1. A predilator comprising:
- a catheter, the catheter comprising a catheter shaft defining a central axis, the shaft having a distal tip, the distal tip having helical threadings; and
a rapid exchange element having a first internal passageway and a second internal passageway, a portion of the catheter shaft passing through the first internal passageway;
wherein the rapid exchange element is rotatably coupled to the shaft allowing rotation of the shaft about its central axis when the rapid exchange element and at least a portion of the shaft are oriented within a body vessel.
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Abstract
A predilation device may comprise a shaft portion and a distal tip having helical threadings. The predilation device may further include a rapid exchange element rotatably coupled to the shaft portion. A guidewire may slidably engage the rapid exchange element and may guide the predilation device to a lesion site. The predilation device may be positioned with the distal tip abutting the lesion. The shaft portion may be rotated, thereby rotating the tip and causing the tip to pass through the lesion and predilate the lesion. In some embodiments, the tip may remove lesion material.
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Citations
23 Claims
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1. A predilator comprising:
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a catheter, the catheter comprising a catheter shaft defining a central axis, the shaft having a distal tip, the distal tip having helical threadings; and a rapid exchange element having a first internal passageway and a second internal passageway, a portion of the catheter shaft passing through the first internal passageway;
wherein the rapid exchange element is rotatably coupled to the shaft allowing rotation of the shaft about its central axis when the rapid exchange element and at least a portion of the shaft are oriented within a body vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A predilator comprising:
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a shaft having a distal tip and an inner lumen, the distal tip tapering to and forming a point, the distal tip having helical threadings; and a rapid exchange element, the rapid exchange element being rotatably coupled to the shaft such that the shaft is rotatable with respect to the rapid exchange element and fixed from movement along a length of the shaft. - View Dependent Claims (19, 20, 21, 22)
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23. A device comprising:
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a catheter shaft defining a central axis, the shaft having a distal tip, the distal tip comprising a taper having helical threadings; and a rapid exchange element having a first internal passageway and a second internal passageway, a portion of the catheter shaft oriented in the first internal passageway, the rapid exchange element attached to the shaft by a rotatable coupling, said rotatable coupling comprising a raised flange and a recess, either the rapid exchange element or the shaft comprising the flange, the other comprising the recess, at least a portion of the raised flange oriented in the recess.
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Specification