The acute effect of stenting with the nitinol self-expanding coil stent: Preliminary experience

A. Roguin, R. Beyar

Research output: Contribution to journalArticlepeer-review

Abstract

Background. The acute angiographic results with the self-expanding nitinol stent have not been reported. We aim to provide angiographic data of the effect of self expansion and balloon assistance on the results. This is analyzed with respect to stent gain, arterial- and stent-recoil. Methods and Results. The self-expanding nitinol coil stent is inherently different than balloon-expandable stents in its mechanism of deployment and the way that radial arterial expansion is achieved. Between January 1995 and June 1996, 86 stents were deployed in 64 patients undergoing elective angioplasty at the Rambam Medical Center, Haifa, Israel. The stent deployment procedure involved stent release assisted by high pressure balloon dilatation. The baseline, post-balloon, post-stenting and post-stent-dilatation characteristics were recorded with similar views, digitized to a PC and analyzed by image processing software. Using computerized analysis, arterial- and stent-recoil and stent gain were calculated for the average stented segment lesion (0.48 ± 0.42, 0.22 ± 0.37, 0.28 ± 0.37, respectively). Balloon angioplasty increased the minimal luminal diameter from 1.07 ± 0.73 mm at baseline, to 2.24 ± 0.57 mm; stent deployment further increased the diameter to 2.63 ± 0;48 mm, and within-stent balloon dilatation to 2.96 ± 0.62 mm. Conclusions. The self-expanding nitinol stent exerts its effect on both the MLD and the average stented diameter through its intrinsic radial force aided by post- deployment within-stent balloon dilatation. A significant correlation was found between stent gain and arterial recoil (slope = 0.59, r = 0.68; p

Original languageEnglish (US)
Pages (from-to)441-450
Number of pages10
JournalInternational Journal of Cardiovascular Imaging
Volume13
Issue number6
DOIs
StatePublished - 1997
Externally publishedYes

Keywords

  • Angioplasty
  • Coronary stents
  • Nitinol
  • Recoil

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine
  • Radiological and Ultrasound Technology

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