(19) United States
(12) Patent Application Publication (io) Pub. No.: US 2002/0183763 Al
Callol et al. (43) Pub. Date: Dec. 5,2002
(54) STENT AND CATHETER ASSEMBLY AND METHOD FOR TREATING BIFURCATIONS
(76) Inventors: Joseph R. Callol, San Francisco, CA (US); Brian D. Brandt, San Jose, CA (US); Nazanine Matin, Palo Alto, CA (US); Hans F. Valencia, Holbrook, MA (US); W. Stan Wilson, Missoula, MT (US)
FULWIDER PATTON LEE & UTECHT, LLP
HOWARD HUGHES CENTER
6060 CENTER DRIVE
LOS ANGELES, CA 90045 (US)
(21) Appl. No.: 10/192,981
(22) Filed: Jul. 11, 2002
Related U.S. Application Data
(62) Division ol application No. 09/861,473, filed on May 17, 2001.
Publication Classification (51) Int. CI.7 A611- 2/06
The present invention provides for an improved stent design and stent delivery catheter assembly for repairing a main vessel and a side branch vessel forming a bifurcation. The present invention includes a trap door stent design, a stent delivery catheter assembly, an apparatus for crimping the stent and the method for crimping the stent onto the catheter assembly, and the method for delivering and implanting the stent in a bifurcated vessel. More particularly, the invention relates to a stent having rings aligned along a common longitudinal axis and connected by links, where the stent has a proximal section, a distal section and a central section. The number of rings and the expanded diameter of the sections is varied to create a "trap door" capable of expanding to a slightly larger diameter than the proximal section and distal section of the stent. The stent is implanted at a bifurcation so that the proximal section and distal section are in the main vessel, and the central section covers at least a portion of the opening to the side branch vessel. A second stent can be implanted in the side branch vessel and abut the expanded central section to provide full coverage of the bifurcated area in the main vessel and the side branch vessel.