Drug-Eluting StentingThe Case for Post-Dilation
Enrico Romagnoli, MD, PhD*,
Giuseppe M. Sangiorgi, MD*,
John Cosgrave, MD*,
Edouard Guillet ,
Antonio Colombo, MD*,*
* Emo Centro Cuore Columbus, Milan, Italy
Medtronic Corporation, Tolochenaz, Switzerland.
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Figure 1 Comparison of Angiographic and IVUS Findings Before and After High-Pressure Stent Post-Dilation
Comparison of angiographic and intravascular ultrasound (IVUS) results after high-pressure stent deployment (A) and after post-dilation with a noncompliant balloon of the same size (B). Note that by angiography, no clear difference can be seen before and after the post-dilation. Conversely IVUS demonstrates a significant increase in lumen cross-sectional area (CSA) after a noncompliant balloon post-dilation.
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Figure 2 Difference Between Compliant and Noncompliant Balloons During High-Pressure Inflation
Bench test showing the different profile between a noncompliant balloon (A) and a semi-compliant stent delivery balloon (B) during high-pressure (>14 atm) inflation. The semi-compliant balloon demonstrates a "dog bone" effect at the edge of the cylinder that can damage the vessel wall in vivo.
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