Experimental Trial of Balloon-Expandable, Metallic Palmaz Stent in the Trachea

Desenvolvimento de uma órtese de Dumon modificada para aplicações traqueais: um estudo experimental em cães

“…In the present study, we attempted to optimize the relationship between stent wall thickness and radial strength by testing different densities in order to determine which would best tolerate the tracheal pressure on the stent walls. (2,3,6,14) Other simplified silicone prototypes, such as the Tygon model, have been tested, with relative success. (15) Additional tests involving bioabsorbable stent materials that approach the ideal are in progress.…”

“…It is also of note that we did not observe stent-induced lesions such as rough epithelium denudation, pyogenic granulomas or even fistulae, all of which have been previous described. (2,5,6,14,17) We believe that this was possible due to the anatomical design and to the use of highly biocompatible silicone, which is appropriate for long-term implantation even in humans. In addition, silicone stents are still considered safer than metallic stents for benign disorders.…”

Esophageal Trachea, a Unique Foregut Malformation Requiring Multistage Surgical Reconstruction: Case Report

“…Internal stenting, using metallic, silicon or bioresorbable materials, is an attractive strategy, particularly because of low invasiveness. It was firstly proposed for adult patients (30), but it never reached appreciation for the use in pediatric cases, due to the higher rate of complications, such as migration and erosion, as well as because the small size of pediatric airways and the need for growth (31)(32)(33)(34). External stenting can be performed using either autologous or prosthetic materials.…”

Management of tracheobronchial obstruction in infants using metallic stents: long-term outcome

“…Palmaz stents had been shown in an experimental trial to provoke an inflammatory reaction and epithelialization. [22] When compared to self expanding stents, Palmaz stent had the advantage of expansion under direct observation. Balloon dilatation was performed first to a satisfactory size, followed by insertion of the Palmaz stent to maintain luminal patency.…”

“…In patient 5, although the stent was fractured and migrated, removal would be extremely difficult due to granulation formation. It had been reported by an experimental study by Fraga et al [22] that attempts to remove stent could be fatal, the stent was found to be incorporated into the fibrotic tracheal wall and could not be removed even after death. Okuyama et al [33] Our study was one of the few published series with no reported stent related mortalities.…”