Original Article from the Society for Vascular SurgeryA balloon-expandable intravascular stent for obliterating experimental aortic dissection*
Section snippets
Material and methods
The stent is a preformed sinusoidal-shaped, stainless-steel, type 316L-0.011 inch (0.279 mm), wire wound into an open-ended helix Medtronic-Wiktor Balloon-Expandable Stent (Medtronic, Minneapolis, Minn.) Once the required length of stent is determined the desired amount is cut from a longer piece and crimped manually onto the low profile balloon of the catheter (Meadox-Surgimed, Inc. [Olbert balloon catheter] Oakland, N.J.). When the stent is longer than the balloon, its trailing portion is
Biocompatibility
No technical problems were encountered with the implant technique in group I. After operation and during the 6-week observation period all animals remained clinically healthy. In all cases preexplant aortograms revealed no stent migration, aortic perforation, thrombosis, or branch occlusion. On gross inspection all aortic branch orifices were patent. The stent was incorporated into the vascular wall with each portion of the coil covered by intima, except at orifices (Fig. 4).
Discussion
In 1969 Dotter15 first introduced the technique for the nonoperative placement of a tubular, coiled nitinol wire stent. Since then several self and balloon expandable stents have been introduced, all with the intent of maintaining luminal patency, usually in conjunction with balloon angioplasty.16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 Previous stents have been limited in length, diameter and their ability to accommodate curves. In an attempt to stent long or curved vascular
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Reprint requests: Victor Parsonnet, MD, Department of Surgery, Newark Beth Israel Medical Center, 201 Lyons Ave., Newark, NJ 07112.