TY - JOUR
T1 - Retrievable covered nitinol stents
T2 - Experiences in 108 patients with malignant esophageal strictures
AU - Song, Ho Young
AU - Deok, Hee Lee
AU - Seo, Tae Seok
AU - Kim, Sung Bae
AU - Jung, Hwoon Yong
AU - Kim, Jong Hoon
AU - Park, Seung Il
N1 - Funding Information:
The study was supported by a grant (#HMP-98-G-2-043) of the HAN (Highly Advanced National) Project, Ministry of Health and Welfare, Republic of Korea.
PY - 2002
Y1 - 2002
N2 - PURPOSE: The authors report their experience with three types of retrievable covered nitinol stents in patients with malignant esophageal strictures. Materials AND METHODS: Three types of retrievable covered nitinol stents were designed. Type A stents were placed in 45 patients, type B stents were placed in 29 patients, and type C stents were placed in 34 patients. The stents were removed with use of a stent retrieval set under fluoroscopic guidance when the stents caused complications. Stent patency, symptom relief, survival rate, and complications were analyzed relative to stent type and radiation therapy. RESULTS: The timing of radiation and the stent type have significant effects on occurrence of complications such as stent migration and fistula formation (P = .002 and P = 0.029, respectively). Complications were significantly more frequent in patients with the type B stent than those with type A or type C stents (P = .008). Patients who underwent radiation therapy before stent placement or who underwent no radiation therapy experienced substantially less complications than those who underwent radiation therapy after stent placement (P = .005 and P < .001, respectively). The survival period was significantly longer in patients who underwent radiation therapy after stent placement than in the other groups (P = .034). Stents were removed from 15 patients (14%) 2 days to 16 weeks (mean, 4 weeks) after stent placement as a result of severe pain (n = 7), stent migration (n = 6), or stent deformity (n = 2). Stent removal was well tolerated in all patients. CONCLUSION: Use of retrievable covered nitinol stents seems to be a safe and effective method of treatment in patients with malignant esophageal strictures. However, removal of the stents was needed in 14% of the patients because of complications. Patients who underwent radiation therapy after stent placement and those with the type B stent experienced more complications than other patients.
AB - PURPOSE: The authors report their experience with three types of retrievable covered nitinol stents in patients with malignant esophageal strictures. Materials AND METHODS: Three types of retrievable covered nitinol stents were designed. Type A stents were placed in 45 patients, type B stents were placed in 29 patients, and type C stents were placed in 34 patients. The stents were removed with use of a stent retrieval set under fluoroscopic guidance when the stents caused complications. Stent patency, symptom relief, survival rate, and complications were analyzed relative to stent type and radiation therapy. RESULTS: The timing of radiation and the stent type have significant effects on occurrence of complications such as stent migration and fistula formation (P = .002 and P = 0.029, respectively). Complications were significantly more frequent in patients with the type B stent than those with type A or type C stents (P = .008). Patients who underwent radiation therapy before stent placement or who underwent no radiation therapy experienced substantially less complications than those who underwent radiation therapy after stent placement (P = .005 and P < .001, respectively). The survival period was significantly longer in patients who underwent radiation therapy after stent placement than in the other groups (P = .034). Stents were removed from 15 patients (14%) 2 days to 16 weeks (mean, 4 weeks) after stent placement as a result of severe pain (n = 7), stent migration (n = 6), or stent deformity (n = 2). Stent removal was well tolerated in all patients. CONCLUSION: Use of retrievable covered nitinol stents seems to be a safe and effective method of treatment in patients with malignant esophageal strictures. However, removal of the stents was needed in 14% of the patients because of complications. Patients who underwent radiation therapy after stent placement and those with the type B stent experienced more complications than other patients.
KW - Esophagus, stenosis or obstruction
KW - Stents and prostheses
UR - http://www.scopus.com/inward/record.url?scp=0036118330&partnerID=8YFLogxK
U2 - 10.1016/S1051-0443(07)61722-9
DO - 10.1016/S1051-0443(07)61722-9
M3 - Article
C2 - 11875088
AN - SCOPUS:0036118330
SN - 1051-0443
VL - 13
SP - 285
EP - 292
JO - Journal of Vascular and Interventional Radiology
JF - Journal of Vascular and Interventional Radiology
IS - 3
ER -