Factors to Obstructive Granulation Tissue Formation After Ultraflex Stenting in Benign Tracheal Narrowing
|ClinicalTrials.gov Identifier: NCT01006200|
Recruitment Status : Completed
First Posted : November 2, 2009
Last Update Posted : November 2, 2009
|Condition or disease|
|Chronic Obstructive Pulmonary Disease|
From August 2001 to September 2007, patients with benign tracheal stenosis who underwent endoscopic tracheal stent placements at the Chang Gung Memorial Hospital, a university-affiliated hospital in Northern Taiwan, were evaluated.
Definition of airway conditions Dynamic collapse (tracheao-malacia) was defined as tracheal lumen narrowing on expiration under bronchoscopic examination. Structural tracheal stenosis was defined as tracheal stenosis excluding dynamic collapse. Etiologies of structural tracheal stenosis were post-intubation or tracheostomy, post-tuberculosis infection, granulation tissue formation cause previous SEMS re-stenosis, previous SEMS fracture, corrosive injury with stricture, mediastinitis cause airway stricture, and goiter compression.
Obstructive granulation tissue formation after SEMS implantation was defined as granulation tissue obstructing the lumen of the SEMS under bronchoscopic examination, including the proximal and distal ends.
Significant variables, such as structural obstruction airway before SEMS implantation was entered into a forward logistical regression analysis to determine the net effect of each predictor while controlling the net effects of others to obstructive granulation tissue formation. Obstructive granulation tissue formation curves between patients with and those without structural tracheal stenosis before SEMS implantation were compared by log rank test.
|Study Type :||Observational|
|Actual Enrollment :||67 participants|
|Official Title:||Factors to Obstructive Granulation Tissue Formation After Ultraflex Stenting in Benign Tracheal Narrowing|
|Study Start Date :||August 2001|
|Primary Completion Date :||September 2007|
|Study Completion Date :||September 2007|
Structural /dynamic airway obstruction
Obstructive granulation tissue formation after SEMS implantation was defined as granulation tissue obstructing the lumen of the SEMS under bronchoscopic examination.
- factors to obstructive granulation tissue formation [ Time Frame: time from stent placement to granualtion tissue formation after metallic stent placement in benign tracheal obstruction. ]
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01006200
|Chang Gung Memorial Hospital|
|Taipei, Taiwan, 10507|
|Principal Investigator:||Fu-Tsai Chung||Department of Thoracic Medicine, Chang Gung Memorial Hospital|