Surgery – Instruments – Blood vessel – duct or teat cutter – scrapper or abrader
Reexamination Certificate
1998-12-16
2001-06-05
Dawson, Glenn K. (Department: 3761)
Surgery
Instruments
Blood vessel, duct or teat cutter, scrapper or abrader
C606S167000, C128S898000, C128S916000, C600S585000
Reexamination Certificate
active
06241744
ABSTRACT:
This invention relates to an apparatus and method for deploying a guidewire across a complex lesion.
Apparatus of various types have heretofore been provided for advancing guidewires through lesions. However, where lesions are totally occluded or almost totally occluded, there is a great difficulty in crossing such stenoses. There is therefore a need for a new and improved method and apparatus for deploying a guidewire across a complex lesion.
In general, it is an object of the present invention to provide an apparatus and method for deploying a guidewire across a complex lesion.
Another object of the invention is to provide an apparatus and method of the above character which permits use of various devices without losing the position of a tip of a guidewire.
Another object of the invention is to provide an apparatus and method of the above character in which the physician can readily switch between different devices in a medical procedure.
Another object of the invention is to provide an apparatus and method of the above character in which a sheath is utilized for speed in negotiating a vessel.
Another object of the invention is to provide an apparatus and method of the above character in which it is possible to rotate the distal tip of the sheath without rotation of a multi-lumen catheter.
Another object of the invention is to provide an apparatus and method of the above character utilizing forward-locking ultrasound image guidance for negotiating passage through complex lesions in the coronary arteries.
Another object of the invention is to provide an apparatus and method of the above character in which the distal extremity of a catheter can be steered as it is advanced across a lesion.
Another object of the invention is to provide an apparatus and method of the above character in which the catheter is provided with a deflectable tip that permits primary (coarse) steering and has an ultrasound probe with a beveled tip surface that permits secondary (fine) steering during advancement of the tip through a lesion.
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Frisbie Jeffrey S.
Imran Mir A.
Katoh Osamu
McGill Scott A.
Ormsby Theodore C.
Dawson Glenn K.
Fox Hollow Technologies, Inc.
Townsend and Townsend / and Crew LLP
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