The apical extracellular matrix plays a central role in epithelial tube morphogenesis. In the Drosophila tracheal system, Serpentine (Serp), a secreted chitin deacetylase expressed by the tracheal cells plays a key role in regulating tube length. Here, we show that the fly fat body, which is functionally equivalent to the mammalian liver, also contributes to tracheal morphogenesis. Serp was exp...

A middle-aged female with a goiter of 10 years' duration presented with progressive pressure symptoms, nocturnal choking and dyspnea on exertion for 5 months. Physical examination demonstrated a large simple multinodular goiter. Imaging revealed a deep retrosternal goiter extending below the tracheal bifurcation with marked tracheal deviation. Total thyroidectomy was carried out via a cervical ...

Gross R E, Neuhauser E B D. Compression of the trachea by an anomalous innominate artery: an operation for its relief. Am J Dis Child 1948; 75: 570-4. 2 Fearon B, Shortreed R. Tracheobronchial compression by congenital cardiovascular anomalies in children. Syndrome of apnea. Ann Otol Rhinol Laryngol 1963; 72: 949-69. 3 Mustard W T, Bayliss C E, Fearon B, Pelton D, Trusler G A. Tracheal compress...

T he laryngeal mask airway (LMA) is accepted as both a rescue ventilation and a primary airway management device in both the prehospital and emergency department environments. A modified version of the LMA, the intubating laryngeal mask airway (ILMA, LMA-Fastrach; Intavent Ltd, Reading, UK) exists, which, when combined with a modified tracheal tube, can be used for blind tracheal intubation. Th...

OBJECTIVES/HYPOTHESIS Currently available silicone and metallic stents for tracheal stenosis are associated with problems of granulations, mucus trapping, and difficult removals. Our aim was to develop a novel bioabsorbable tracheal stent with mitomycin C (MMC) drug elution to circumvent such problems. STUDY DESIGN A randomized animal study. METHODS Twenty-five rabbits were randomly assigne...

In anesthetized, artificially ventilated rabbits with vagus nerve section, inhalation of CO(2) gas mixtures (tracheal CO(2) concentration ranging from 8.0 to 10.2%) for 60 s decreased slowly adapting pulmonary stretch receptor (SAR) activity during both inflation and deflation. The magnitude of decreased receptor activity during deflation had a more pronounced effect than that seen during infla...

STEPHENS, N. L., AND R. W. MITCHELL. Mechanism of action of respiratory acidosis on tracheal smooth muscle. Am. J. Physiol. 227(3) : 647-651. 1974.-The effects of respiratory acidosis (RA) (increased Pco~) on canine tracheal smooth muscle (TSM) were studied mechanically. Isometrically, maximum tetanic tension (PO) decreased by 15.9 y0 =t 1.97 (mean rt SE) on stimulation every 5 min. The tonic r...

Free full text available from www.ijccm.org A b st ra ct We present three cases of iatrogenic tracheal injury. Two patients suffered acute tracheal injuries during anesthesia/surgery, one was managed surgically and the other conservatively. The third case is a delayed tracheal injury presenting as a fistula. The reasons for surgical vs conservative management of tracheal injuries and preventive...

We present a case of problematic tracheal intubation in an adult patient with an unrecognized tracheal bronchus. Immediately after tracheal intubation and position change to prone, bilateral breath sounds were almost absent, and there was a diminished tidal volume. In order to resolve the ventilatory difficulty, the wire-reinforced tube was replaced with a conventional tube, and proper position...

The Drosophila tracheal system consists of a stereotyped network of epithelial tubes formed by several tracheal cell types. By the end of embryogenesis, when the general branching pattern is established, some specialised tracheal cells then mediate branch fusion while others extend fine terminal branches. Here evidence is presented that the Notch signalling pathway acts directly in the tracheal...