Burcu Alparslan1, Omer Fatih Nas2, Ulku Turpcu Eritmen3, Selcen Duran4, Guven Ozkaya5, Bahattin Hakyemez6. 1. Radiology Clinic, Yozgat State Hospital, Yozgat, Turkey. burcu.alparslan@gmail.com. 2. Department of Radiology, Uludag University Faculty of Medicine, Bursa, Turkey. omerfatihnas@gmail.com. 3. Radiology Clinic, Special Eregli Anatolia Hospital, Zonguldak, Turkey. drulkutur@hotmail.com.tr. 4. Neurology Clinic, Yerkoy State Hospital, Yozgat, Turkey. selcenduran16@hotmail.com. 5. Department of Biostatistics, Uludag University Faculty of Medicine, Bursa, Turkey. ozkaya@uludag.edu.tr. 6. Department of Radiology, Uludag University Faculty of Medicine, Bursa, Turkey. bhakyemez@uludag.edu.tr.
Abstract
PURPOSE: The aim of this study was to investigate the effect of stent cell geometry on midterm results of carotid artery stenting (CAS). MATERIALS AND METHOD: One hundred fifty-five patients underwent CAS between February 2010 and December 2012. Ninety-one open- and 84 closed-cell stents were used in this non-randomized, retrospective study. Periprocedural complications were defined as the ones happened during the procedure or within 30 days afterwards. Starting from the 6th month after the procedure, in-stent restenosis was detected with multidetector computed tomography angiography and classified into four groups from focal restenosis to occlusion. RESULTS: Eleven complications were encountered in the periprocedural period (four on the open- and seven on the closed-cell group). Total complication rate was 6.3% (11/175). No significant difference was detected in terms of periprocedural complications between two groups (p = 0.643). There was statistically significant difference between stent design groups in regard to radiological findings (p = 0.002). Sixteen of open-cell stents and three of closed-cell stents had focal restenosis. One closed-cell stent had diffuse proliferative restenosis and one open-cell stent had total occlusion. CONCLUSION: In-stent restenosis was more common in open-cell stent group, which have larger free cell area than closed-cell stents. Although our radiologic findings promote us to use closed-cell design if 'possible', no difference was detected in terms of clinical outcomes.
PURPOSE: The aim of this study was to investigate the effect of stent cell geometry on midterm results of carotid artery stenting (CAS). MATERIALS AND METHOD: One hundred fifty-five patients underwent CAS between February 2010 and December 2012. Ninety-one open- and 84 closed-cell stents were used in this non-randomized, retrospective study. Periprocedural complications were defined as the ones happened during the procedure or within 30 days afterwards. Starting from the 6th month after the procedure, in-stent restenosis was detected with multidetector computed tomography angiography and classified into four groups from focal restenosis to occlusion. RESULTS: Eleven complications were encountered in the periprocedural period (four on the open- and seven on the closed-cell group). Total complication rate was 6.3% (11/175). No significant difference was detected in terms of periprocedural complications between two groups (p = 0.643). There was statistically significant difference between stent design groups in regard to radiological findings (p = 0.002). Sixteen of open-cell stents and three of closed-cell stents had focal restenosis. One closed-cell stent had diffuse proliferative restenosis and one open-cell stent had total occlusion. CONCLUSION: In-stent restenosis was more common in open-cell stent group, which have larger free cell area than closed-cell stents. Although our radiologic findings promote us to use closed-cell design if 'possible', no difference was detected in terms of clinical outcomes.