Surgery – Miscellaneous – Methods
Reexamination Certificate
1998-02-04
2001-10-02
Nguyen, Dinh (Department: 3738)
Surgery
Miscellaneous
Methods
Reexamination Certificate
active
06295989
ABSTRACT:
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not applicable
REFERENCE TO A “MICROFICHE APPENDIX”
Not applicable
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to internal carotid artery (ICA) angioplasty with cerebral protection. More particularly, the present invention relates to a system for conducting angioplasty while minimizing risk of strokes.
2. General Background of the Invention
When angioplasties are performed, sometimes plaque gets dislodged and travels into the brain, sometimes causing strokes.
The following references are hereby incorporated by reference:
Guide catheters these days are introduced generally through the body though a large sheath. There are now some guide catheters which are introduced with a small thin dilator that leads them over a wire into the body, and one ends up with a guide catheter in the body that was gotten in there loaded over the little dilator. These are then in a location not applicable to guide catheter use. For use in a branch vessel, they have to be led by a previously placed selective catheter and/or a guide wire.
U.S. Pat. Nos. 3,726,269; 4,033,331; 4,169,464; 4,573,966; 4,925,445; 4,935,017; 5,120,323; 5,163,906; 5,199,951; 5,203,776; 5,215,540; 5,219,355; 5,267,982; 5,290,229; 5,304,131; 5,342,306; 5,348,545; 5,368,566; 5,389,090; 5,458,574; 5,462,529; 5,480,380; 5,484,412; European Patent Specification Publication Nos. 0 339 799 B1 and 0 277 366 A1 and PCT International Application Publication No. WO 96/26758.
BRIEF SUMMARY OF THE INVENTION
The apparatus of the present invention solves the problems confronted in the art in a simple and straightforward manner. What is provided is a method of performing an operation including angioplasty of the internal carotid artery comprising the following steps: (a) blocking blood flow in the internal carotid artery; (b) performing the angioplasty while the blood flow is blocked in the internal carotid artery; (c) reversing flow in the internal carotid artery after the angioplasty has been performed to wash material loosened during the angioplasty out of the internal carotid artery; and (d) restoring normal flow in the internal carotid artery.
Also provided is a guide catheter system which can be inserted into a patient without a sheath, thus allowing the use of large guide catheters without a corresponding larger hole in the vessel wall.
The present system allows selective placement of a guide catheter in one step, eliminating the need for a sheath, selective diagnostic catheter, and exchange wire.
The entire process of guide catheter introduction is one process, thus much faster. The unit is placed over a standard guide wire through the skin into the vasculature. The lack of need for a separate sheath system saves this step from the introducer.
The eventual target vessel for the guide catheter is selected with a catheter/dilator specifically designed for that purpose (the inner “dilator”). This allows optimal design capabilities for the guide catheter due to the fact that it will not have to function as a selecting catheter at the same time.
The lack of need for a separate diagnostic catheter to pre-select the intended vessel saves the step of placing a diagnostic catheter into the intended location, placing an exchange wire, pulling the selective catheter, and then placing a guide catheter over this exchange wire.
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Theron et al., Carotid Artery Stenosis: Treatment with Protected Balloon Angioplasty and Stent Replacement, Radiology, (Dec. 1996), 201(3), 627-36.
Arteria Medical Science, Inc.
Fish & Neave
Nguyen Dinh
Pisano Nicola A.
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