Document Detail

Intravascular ultrasound identification of stent entrapment in vivo with in vitro confirmation.
MedLine Citation:
PMID:  8993814     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: One potential complication of stenting is "stent jail" due to placement of a stent across a side branch, which may impede additional interventions. Another form of stent entrapment may occur if the guidewire is accidentally withdrawn and then unknowingly passes through a stent loop during reentry with subsequent high pressure expansion. The purpose of this study was to evaluate this form of stent entrapment in vitro by intravascular ultrasound (IVUS). METHODS: A guidewire was passed through the end or middle diamonds of Palmaz-Schatz and Palmaz stents or the middle of Gianturco-Roubin stents. A 3.5 mm balloon was inflated over the guidewire through the various side holes of the stents. RESULTS: IVUS images presented three distinct patterns depending on the type of stent and position of balloon entry: 1) external compression and loss of wall continuity in the Palmaz-Schatz and Palmaz stents, 2) displacement of the side diamond across the lumen, and 3) external compression of the Gianturco-Roubin stent. The first and second patterns but not the third one were associated with impairment of lumen access. CONCLUSIONS: Based upon this in vitro verification, IVUS imaging can be used to identify the presence of stent entrapment in vivo.
T Hiro; C Y Leung; R J Russo; P Teirstein; L A Yeatman; J M Tobis
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Publication Detail:
Type:  Case Reports; In Vitro; Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Catheterization and cardiovascular diagnosis     Volume:  40     ISSN:  0098-6569     ISO Abbreviation:  Cathet Cardiovasc Diagn     Publication Date:  1997 Jan 
Date Detail:
Created Date:  1997-03-26     Completed Date:  1997-03-26     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  7508512     Medline TA:  Cathet Cardiovasc Diagn     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  40-5     Citation Subset:  IM    
Division of Cardiology, University of California, Irvine, Orange 92668-3298, USA.
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MeSH Terms
Angioplasty, Balloon
Coronary Angiography / adverse effects,  instrumentation*
Coronary Disease / therapy,  ultrasonography*
Equipment Safety
Foreign-Body Migration / etiology,  ultrasonography*
Middle Aged
Stents / adverse effects*
Ultrasonography, Interventional*
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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