title: Placement of retrievable self-expandable metallic stents with barbs into patients with obstructive prostate cancer.
abstract: OBJECTIVE
  To evaluate the technical feasibility and clinical effectiveness of retrievable self-expandable metallic stents with barbs in patients with obstructive prostate cancer.
  
  
  METHODS
  Retrievable self-expandable metallic stents with eight barbs each were inserted into eight consecutive patients with obstructive prostate cancer. Patient ages ranged from 55 to 76 years (mean, 69 years). All eight patients had previously received hormone therapy, and three had undergone palliative transurethral prostatectomy. Stents were removed using a 21-F stent removal set if they caused complications.
  
  
  RESULTS
  Stent placement was technically successful and well tolerated in all patients. One had severe incontinence, which improved spontaneously, and two had gross haematuria, which disappeared spontaneously within 4 days. Peak urine flow rates and post-void residual urine volumes 1 month after stent placement were 5.6-10.2 ml/s (mean, 8.3 ml/s), and 5-45 ml (mean, 27 ml), respectively. During a mean follow-up of 192 days (range, 39-632 days), one patient required stent removal after 232 days because of stone formation within the stent. No further intervention was required because the mass improved after stent removal.
  
  
  CONCLUSIONS
  These preliminary results suggest that retrievable stents with eight barbs are both feasible to place and effective in patients with obstructive prostate cancer.
authors.affiliation: Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, 388-1, Poongnap 2-dong, Songpa-gu, Seoul 138-736, Republic of Korea. hysong@amc.seoul.kr
authors.forename: Ho-Young
authors.initials: HY
authors.lastname: Song
authors.forename: Choung Soo
authors.initials: CS
authors.lastname: Kim
authors.forename: In Gab
authors.initials: IG
authors.lastname: Jeong
authors.forename: Dalsan
authors.initials: D
authors.lastname: Yoo
authors.forename: Jin Hyoung
authors.initials: JH
authors.lastname: Kim
authors.forename: Deok Ho
authors.initials: DH
authors.lastname: Nam
authors.forename: Jae-Ik
authors.initials: JI
authors.lastname: Bae
authors.forename: Jung-Hoon
authors.initials: JH
authors.lastname: Park
mesh_terms: D000368:Aged; D020878:Device Removal / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005240:Feasibility Studies; D006801:Humans; D008297:Male; D008670:Metals; D008875:Middle Aged; D011471:Prostatic Neoplasms / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery*; D011859:Radiography; D015607:Stents; D016896:Treatment Outcome; D014517:Ureteral Obstruction / Q000000981:diagnostic imaging / Q000209:etiology / Q000601:surgery*
chemical_list: D008670:Metals