View clinical trials related to Larynx.
Filter by:The purpose of this study is to measure the short- and long-term voice outcome and outcome predictors of glottoplasty, cricothyroid approximation, thyroplasty, and chondrolaryngoplasty using a prospective non-randomized controlled trial and a multidimensional voice assessment protocol. Secondly, a laryngeal magnetic resonance imaging protocol will be developed to measure pre- and postoperative anatomical factors and compare them with the acoustic changes.
Diseases of the larynx and trachea are a heterogenous group of disorders. Witch may include congenital anatomical disorders, neoplastic changes, vocal cord paralysis of varied aetiology or narrowing of the larynx associated with long-term intubation. The multitude of disorders of these organs necessitates the continuing search for diagnostic methods which will not only provide answers to clinical questions but will also be safe and with the least level of interference with the wellbeing of the patient, which is of particular importance in the neonate. In recent decades only a few studies have been reported which described the ultrasound anatomy of the larynx prior to and following intubation or that of the mobility of the vocal cords. To date, no standards have been published concerning the size of the structures of the larynx and trachea or the mobility of the vocal cords on ultrasound examination in the neonate. Additionally, there are no recommendations which include ultrasound examination as a reliable component of the diagnosis of congenital disorders of the larynx or other diseases of this organ. Ultrasound is a non-invasive, repeatable and safe diagnostic method, which has recently, thanks the development of technology, provided for the very accurate imaging of even small structures, as well as their assessment on dynamic examination. Furthermore, the easy availability of this examination may in the future contribute to the early diagnosis of diseases of the larynx and trachea without the need to prolong neonatal hospitalization or anaesthesia. In addition, the use of neural networks to analyse the ultrasound images obtained will provide for the development of algorithms which could become an irreplaceable tool, not only in the diagnosis of the disorders described, but also in predicating disorders affecting their further development or functional disorders in infancy.
The Investigators aim to: 1. Study the effect of hyperventilation on the development of paradoxical vocal cord movement (PVCM) in healthy individuals and in patients with mild and severe asthma, 2. Relate PVCM to airway symptoms and measurements of intra- and extra-thoracic airway hyperresponsiveness (ET-AHR), 3. Evaluate the effects of inhaled anti-cholinergic agents on PVCM induced by hyperventilation. Hypotheses: 1. In health PVCM will not occur in response to hyperventilation, 2. In asthma PVCM will occur in response to hyperventilation, 3. Airway symptoms and ET-AHR will develop in parallel with PVCM, 4. Inhaled anticholinergic agents will prevent PVCM induced by hyperventilation.
Comparision of direct laryngoscopy and video laryngoscopy to learn successful tracheal intubation by novices in anaesthesiology
This is a prospective double blinded randomized crossover controlled trial aiming at validating the measurement of laryngopharyngeal mechanosensitivity in patients with suspected OSA using a recently developed laryngopharyngeal endoscopic esthesiometer and rangefinder (LPEER). Subjects will be recruited from patients with suspected OSA referred for baseline polysomnography to a university hospital sleep laboratory. Intra- and inter-rater reliability will be evaluated using the Bland-Altman's limits of agreement plot, the intraclass correlation coefficient, and the Pearson or Spearman correlation coefficient, depending on the distribution of the variables. Diagnostic accuracy will be evaluate plotting Receiver-operating-characteristic-curves (ROC-curves) using as reference standard basal polysomnogram. The sensory threshold values for patients with mild, moderate, and severe OSA, will be determined and compared using ANOVA or Kruskal Wallis test, depending on the distribution of the variables.