nitinol and Uterine-Cervical-Neoplasms

Self-expandable metallic stents (SEMS) of varying designs and materials have been developed to reduce complications, but few comparative data are available with regard to the type of stent and the stent manufacturer. We analyzed the success rates and complication rates, according to stent type (uncovered vs. covered stent) and individual stent manufacturer, in malignant colorectal obstruction.. From November 2001 to August 2008, 103 patients were retrospectively included in this study: four types of uncovered stents in 73 patients and two types of covered stents in 30 patients. The SEMS was inserted into the obstructive site by using the through-the-scope method.. Technical and clinical success rates were not different between stent type or among stent manufacturers: 100 and 100% (p = ns) and 100 and 96.6% (p > 0.05), respectively, in uncovered and covered stents. Stent occlusion and migration rates were 12.3 and 3.3% (p = 0.274) and 13.7 and 16.7% (p = 0.761), respectively, in uncovered and covered stents, and 11.1, 5, and 9% (p = 0.761) and 25.9, 15, and 0% (p = 0.037) in Wallstent, Niti-S, and Bonastent uncovered stents, respectively.. The placement of SEMS is an effective and safe treatment for patients with malignant colorectal obstruction. Although minor differences in outcome were detected according to the type and the manufacturer of the stents, no statistically significant difference was observed, except in stent migration among the stent manufacturer.

Topics: Adenocarcinoma; Aged; Aged, 80 and over; Alloys; Carcinoma; Chromium Alloys; Coated Materials, Biocompatible; Cobalt; Colonic Diseases; Colonic Neoplasms; Colonoscopy; Equipment Design; Female; Fluoroscopy; Foreign-Body Migration; Humans; Intestinal Obstruction; Male; Middle Aged; Palliative Care; Pancreatic Neoplasms; Radiography, Interventional; Rectal Diseases; Stents; Stomach Neoplasms; Treatment Outcome; Uterine Cervical Neoplasms

The paper is concerned with the description of the first experience in a new method of roentgen endoprosthetics of the cervical canal of the uterus using a nitinol spiral prosthesis. The spiral has a shape memory effect. Prostheses were implanted to 13 patients with strictures or atresia of the cervical canal after bougienage for a period of 193 days. A new canal was formed with further epithelialization within this period. Recurrences after prosthesis removal were unnoticed.

Topics: Adult; Alloys; Carcinoma in Situ; Cervix Uteri; Constriction, Pathologic; Dilatation; Female; Humans; Laser Therapy; Postoperative Complications; Prostheses and Implants; Prosthesis Design; Radiography; Time Factors; Uterine Cervical Neoplasms