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Revista chilena de cardiología

On-line version ISSN 0718-8560

Abstract

VALDES, Francisco et al. Endovascular repair of abdominal aortic aneurysm: comparative results of a pilot study using the Ovation™ prosthesis . Rev Chil Cardiol [online]. 2011, vol.30, n.1, pp.42-46. ISSN 0718-8560.  http://dx.doi.org/10.4067/S0718-85602011000100006.

Background. Current endografts used in treatment of abdominal aortic aneurysm (AAA), use large (18-25F) delivery systems. Graft fixation and aneurysm sealing is obtained by a proximal stent, requiring an aortic neck >15 mm. Objective. To compare the efficacy and safety of Ovation™ endograft (TriVascular, USA) with standard endografts. Methods. Between November 2009 and August 2010 we treated 47 AAA. In 10 patients we used Ovation™ (Group 1). Ten patients treated during the same period with commercially available endografts were used as controls (Group (2). The Ovation™ endo-prosthesis is tri-modular, made of PTFE andnitinol with low profile (13-15F) and has a barbed suprarenal stent for fixation. Sealing is obtained independently through 2 inflatable rings filled with a biocompatible polymer during the procedure. Implantation followed the standard procedure through femoral exposure, using the Philips Allura imaging equipment (Best, Netherlands). Procedure duration, length of stay (LOS) and complications were compared between groups. Fisher exact test and unpaired Student’s t test were used for comparisons. Results. Results. Technical success was 100%. We observed no difference between groups (age, sex, AAA size, ASA risk, preoperative lab work). Procedure time (hrs) was 2,12 ± 0,7 vs. 2,0 ± 0,6 (NS), LOS (hrs) was 44,5 ± 10,7 vs. 49,5 ± 32,0 (NS) in Groups 1 and 2, respectively. Aneurysm neck length and ICU stay were shorter in Group 1 (p= 0,035 and 0,0451 respectively). During a 12 month follow up no adverse events, type I or III endoleak, or secondary interventions have occurred. Conclusion. Results with Ovation™ are comparable to other endografts currently available, achieving the same standards of efficacy and safety. Its highly flexible delivery system allows navigation through small vessels, easy deployment and effective sealing of AAA with necks > 7 mm, broadening the span of patients suitable for endovascular treatment.

Keywords : abdominal aortic aneurysm; endovascular repair.

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