The Effect of Stent Cell Geometry on Carotid Stenting Outcomes.
OBJECTIVE
The aim of this study was to investigate the effect of stent cell geometry on midterm results of carotid artery stenting (CAS).


METHODS
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.


CONCLUSIONS
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.
Radiology Clinic, Yozgat State Hospital, Yozgat, Turkey. burcu.alparslan@gmail.com.
Burcu
B
Alparslan
Department of Radiology, Uludag University Faculty of Medicine, Bursa, Turkey. omerfatihnas@gmail.com.
Omer Fatih
OF
Nas
Radiology Clinic, Special Eregli Anatolia Hospital, Zonguldak, Turkey. drulkutur@hotmail.com.tr.
Ulku Turpcu
UT
Eritmen
Neurology Clinic, Yerkoy State Hospital, Yozgat, Turkey. selcenduran16@hotmail.com.
Selcen
S
Duran
Department of Biostatistics, Uludag University Faculty of Medicine, Bursa, Turkey. ozkaya@uludag.edu.tr.
Guven
G
Ozkaya
Department of Radiology, Uludag University Faculty of Medicine, Bursa, Turkey. bhakyemez@uludag.edu.tr.
Bahattin
B
Hakyemez
D000368:Aged; D017130:Angioplasty / Q000009:adverse effects*; D001807:Blood Vessel Prosthesis / Q000009:adverse effects*; D019917:Blood Vessel Prosthesis Implantation / Q000009:adverse effects; D016893:Carotid Stenosis / Q000000981:diagnostic imaging / Q000601:surgery*; D000072226:Computed Tomography Angiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D061330:Multidetector Computed Tomography; D011474:Prosthesis Design; D012008:Recurrence; D012189:Retrospective Studies; D015607:Stents / Q000009:adverse effects
Closed-cell stent; Free cell area; Midterm results; Open-cell stent; Stent cell geometry