Retrievable covered nitinol stents: Experiences in 108 patients with malignant esophageal strictures

Ho Young Song, Hee Lee Deok, Tae-Seok Seo, Sung Bae Kim, Hwoon Yong Jung, Jong Hoon Kim, Seung Il Park

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish
Pages (from-to)285-292
Number of pages8
JournalJournal of Vascular and Interventional Radiology
Volume13
Issue number3
DOIs
Publication statusPublished - 2002 Jan 1
Externally publishedYes

Fingerprint

Esophageal Stenosis
Stents
Radiotherapy
nitinol

Keywords

  • Esophagus, stenosis or obstruction
  • Stents and prostheses

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

Cite this

Retrievable covered nitinol stents : Experiences in 108 patients with malignant esophageal strictures. / Song, Ho Young; Deok, Hee Lee; Seo, Tae-Seok; Kim, Sung Bae; Jung, Hwoon Yong; Kim, Jong Hoon; Park, Seung Il.

In: Journal of Vascular and Interventional Radiology, Vol. 13, No. 3, 01.01.2002, p. 285-292.

Research output: Contribution to journalArticle

Song, Ho Young ; Deok, Hee Lee ; Seo, Tae-Seok ; Kim, Sung Bae ; Jung, Hwoon Yong ; Kim, Jong Hoon ; Park, Seung Il. / Retrievable covered nitinol stents : Experiences in 108 patients with malignant esophageal strictures. In: Journal of Vascular and Interventional Radiology. 2002 ; Vol. 13, No. 3. pp. 285-292.
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abstract = "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.",
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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

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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.

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