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.


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).


CONCLUSIONS
Dual-design expandable colorectal stents with flared ends and those with bent ends are equally safe and effective, having similar perforation and migration rates.
Kim
Jin Hyoung
JH
Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 388-1, Poongnap-2dong, Songpa-gu, Seoul 138-736, Republic of Korea.
Song
Ho-Young
HY
Li
Yong-Dong
YD
Shin
Ji Hoon
JH
Park
Jung-Hoon
JH
Yu
Chang-Sik
CS
Kim
Jin Cheon
JC
D015179:Colorectal Neoplasms / Q000150:complications* / Q000601:surgery*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005260:Female; D006801:Humans; D007415:Intestinal Obstruction / Q000209:etiology* / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D015607:Stents; D016896:Treatment Outcome