title: A Safe Method of Tracheal Polyflex Stent Placement: A Review of 20 Patients.
abstract: BACKGROUND
  Surgery is an appropriate therapeutic approach for tracheal stenosis due to various benign and malignant conditions. When surgery is postponed for certain reasons, other options are chosen for airway patency. One alternative is using airway stents.
  
  
  OBJECTIVE
  We aimed to introduce a safe method of tracheal polyflex stent placement in patients with tracheal stenoses.
  
  
  METHODS
  During a 7-year period (2002 - 2008), polyflex stents were used 29 times among 20 patients for various indications. After encountering many difficulties in earlier cases, we gradually developed our new method and used it in most of our patients. In this method, without using large rigid bronchoscopes, the introducer tube could be used as a bronchoscope with the aid of a zero-degree lens and ventilating apparatus. In this method, the rate of possible trauma to the airway can be minimized by avoiding the use of thick rigid bronchoscopies and the stent can be placed faster and more accurately.
  
  
  RESULTS
  Polyflex stents were used in 11 men (55%) and 9 women with a mean age of 38.5 years. Stents were removed and changed in 12 cases and replaced with another type of stent in 3 patients. Indications were recurrence of tracheal stenosis (7), multisegmental tracheal stenosis (3), anesthesia limitations (3), tracheal tumors (2), dehiscence of tracheal anastomosis (1), severe inflammation of the tracheal mucosa (1), esophagobronchial fistula (1), and external pressure on the left main bronchus (1). In one patient, a stent was used to open a kinked Dumon stent as a temporary life-saving procedure. We found 6 cases of stent migration, 3 cases of granulation tissue formation, 1 case of infection, and 1 case of surgical site dehiscence.
  
  
  CONCLUSIONS
  Stents would be regarded as a temporary means of reaching the ideal condition for resection and reconstruction in most patients with tracheal stenoses. Although an optimal stent has not been introduced yet, we used polyflex stents in most of our patients with tracheal stenosis due to its availability and ease of use. We suggest that this method is safe and less time consuming than its traditional method of placement.
authors.affiliation: Tracheal Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Thoracic Surgery Department, Shahid Beheshti University of Medical Sciences, Tehran, IR Iran.
authors.forename: Saviz
authors.initials: S
authors.lastname: Pejhan
authors.affiliation: Tracheal Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Thoracic Surgery Department, Shahid Beheshti University of Medical Sciences, Tehran, IR Iran.
authors.forename: Mojtaba
authors.initials: M
authors.lastname: Javaherzadeh
authors.affiliation: Lung Transplantation Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Thoracic Surgery Department, Shahid Beheshti University of Medical Sciences, Tehran, IR Iran.
authors.forename: Abolghasem
authors.initials: A
authors.lastname: Daneshvar
authors.affiliation: Tracheal Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Thoracic Surgery Department, Shahid Beheshti University of Medical Sciences, Tehran, IR Iran.
authors.forename: Roya
authors.initials: R
authors.lastname: Farzanegan
keywords: Methods; Stents; Thoracic; Tracheal Stenosis; Treatment