The transgenic tobacco plant XD4V-26 carrying the recombinant mouse aryl hydrocarbon receptor XD4V-mediated β-glucuronidase (GUS) reporter gene expression system was used for assay of dioxins and dioxin-like compounds consisting of polychlorinated dibenzeno-p-dioxins, polychlorinated dibenzofurans, and coplanar polychlorinated biphenyls (Co-PCBs) in actually contaminated soils. The transgenic t...

Tip-enhanced Raman scattering (TERS) and optically excited tip-enhanced fluorescence (TEF) of a self-assembled porphyrin monolayer on Ag(111) are studied using an ultrahigh vacuum scanning tunneling microscope (UHV-STM). Through selectively exciting different Q-bands of meso-tetrakis- (3,5-ditertiarybutylphenyl)-porphyrin (H2TBPP), chemical information regarding different vibronic excited state...

H-type tracheoesophageal fistula (TEF) is extremely rare in infants and children, and clinical manifestations of this condition are diverse based on its severity. Some cases of congenital TEF diagnosed in adulthood have been reported, which indicate the difficulty of early diagnosis of this disease. Gastroesophageal reflux (GER) may induce chronic aspiration, pulmonary aspiration, apparent life...

BACKGROUND Airway obstruction or tracheoesophageal fistula (TEF) near the tracheal carina requires placement of Y-shaped stents. Herein, we describe our multicenter experience with the placement of Dumon silicone Y-stents. We also conduct a systematic review for studies describing the deployment of airway silicone Y-stents. METHODS This was a retrospective analysis of consecutive subjects who...

Tracheoesophageal fistulas (TEF) present a perioperative management challenge. A 62 year-old man with esophageal carcinoma presented with a large tracheoesophageal fistula extending most of the trachea. Previously, the patient had two overlapping esophageal and one tracheal stent placed, but he developed progressive tracheal disruption due to esophageal stent perforation near the level of the c...

Persistent air leak is not a common problem in patients who are under mechanical ventilation support; however, it can be encountered in intensive care unit (ICU). It is often due to nonuniform contact between the cuff and the tracheal wall caused by insufficient cuff pressure or malposition of the tube. Tracheostomy is commonly applied and is a relatively safe invasive procedure in ICU. We repo...

BACKGROUND Esophageal atresia (EA), tracheoesophageal fistula (TEF), or both is a complicated problem. The purpose of this study was to evaluate the outcomes and postoperative complications in patients with EA/TEF who were admitted to our hospital. METHODS In total, 15 patients were enrolled from 1994 to 2003, including 8 males and 7 females. Patient demographics, associated anomalies, and ou...

There is no PF for TCDD currently available in the Integrated Risk Information Service database (3). However, the PF originally derived from the aforementioned study was 156,000 mg/kg/day and may be modified downward to approximately 100,000 mg/kg/day, based on reinterpretation of histopathologic data. Applying van Birgelen's TEF to these values would suggest a PF for the carcinogenic action of...

Tracheal penetration of esophageal self-expanding metallic stents (SEMS) with/without tracheoesophageal fistula (TEF) formation is a rare occurrence. We report the case of a 66-year-old female patient with advanced esophageal squamous cell carcinoma who had undergone palliative esophageal stenting on three occasions for recurrent esophageal stent obstruction. On evaluation of symptoms of breath...