Dual-Design Expandable Colorectal Stent for Malignant Colorectal Obstruction: Comparison of Flared Ends and Bent Ends
OBJECTIVE. The purpose of this study was to compare, focusing on
colonic perforation and stent migration, the clinical safety and efficacy of
dual-design expandable colorectal stents with flared ends with those of stents
with bent ends in the treatment of patients with malignant colorectal
obstruction.
SUBJECTS AND METHODS. A total of 122 patients with malignant
colorectal obstruction underwent implantation of dual-design stents with
flared (n = 69) or bent (n = 53) ends.
RESULTS. Stent placement was technically successful in 116 of 122
patients (95.1%), 65 of 69 patients (94.2%) with flared-end stents and 51 of
53 patients (96.2%) with bent-end stents (p > 0.05). Clinical
success was achieved within 2 days in 61 of 65 patients (93.8%) with bent-end
stents and in 46 of 51 patients (90.2%) with flared-end stents (p
> 0.05). Complications included seven cases of colonic perforation (6%),
seven cases of stent migration (6%), three cases of tumor overgrowth (2.6%),
four cases of severe rectal pain (3.4%), and four cases of bleeding (3.4%).
There were no significant differences between the rates of colonic perforation
and stent migration in the two groups (6.2% vs 5.9%), and the overall
complication rates were similar (p > 0.05).
CONCLUSION. Dual-design expandable colorectal stents with flared
ends and those with bent ends are equally safe and effective, having similar
perforation and migration rates.