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Accurate detection of stent-graft migration in a pulsatile aortic model using Roentgen stereophotogrammetric analysis.
Koning, Olivier H J; Garling, Eric H; Hinnen, Jan-Willem; Kroft, Lucia J M; van der Linden, Edwin; Hamming, Jaap F; Valstar, Edward R; van Bockel, J Hajo.
Afiliación
  • Koning OH; Departments of Surgery (Division of Vascular Surgery), Leiden University Medical Center, Leiden, The Netherlands. o.koning@jbz.nl
J Endovasc Ther ; 14(1): 30-8, 2007 Feb.
Article en En | MEDLINE | ID: mdl-17291148
ABSTRACT

PURPOSE:

To evaluate the feasibility and accuracy of Roentgen stereophotogrammetric analysis (RSA) versus computed tomography (CT) for detecting stent-graft migration in an in vitro pulsatile circulation model and to study the feasibility of a nitinol endovascular clip (NEC) as an aortic wall reference marker for RSA.

METHODS:

An aortic model with stent-graft was constructed and connected to an artificial circulation with a physiological flow and pressure profile. Tantalum markers and NECs were used as aortic reference markers for RSA analysis. Stent-graft migrations were measured during pulsatile circulation with RSA and CT. CT images acquired with 64 x 0.5-mm beam collimation were analyzed with Vitrea postprocessing software using a standard clinical protocol and central lumen line reconstruction. RSA in the model with the circulation switched off was used as the reference standard to determine stent-graft migration. The measurement errors of RSA and CT were determined during pulsatile circulation.

RESULTS:

The mean measurement error +/- standard deviation (maximum) of RSA during pulsatile circulation using the tantalum markers was -0.5+/-0.16 (0.7) mm. Using the NEC, the mean (maximum) measurement error was -0.4+/-0.25 (1.1) mm. The mean (maximum) measurement error of CT was -1.1+/-1.17 (2.8) mm.

CONCLUSION:

RSA is an accurate and feasible tool to measure stent-graft migration in a pulsatile environment. Migration measurement with RSA was more accurate than CT in this experimental setup. The nitinol clip tested in this study is potentially feasible as an aortic reference marker in patients after endovascular repair.
Asunto(s)
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Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Aorta Torácica / Fotogrametría / Stents / Migración de Cuerpo Extraño / Implantación de Prótesis Vascular Tipo de estudio: Diagnostic_studies / Etiology_studies / Evaluation_studies / Guideline / Prognostic_studies Límite: Animals / Humans Idioma: En Revista: J Endovasc Ther Asunto de la revista: ANGIOLOGIA Año: 2007 Tipo del documento: Article País de afiliación: Países Bajos
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Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Aorta Torácica / Fotogrametría / Stents / Migración de Cuerpo Extraño / Implantación de Prótesis Vascular Tipo de estudio: Diagnostic_studies / Etiology_studies / Evaluation_studies / Guideline / Prognostic_studies Límite: Animals / Humans Idioma: En Revista: J Endovasc Ther Asunto de la revista: ANGIOLOGIA Año: 2007 Tipo del documento: Article País de afiliación: Países Bajos