Stridor | EPFL Graph Search

Stridor (Latin for "creaking or grating noise") is a high-pitched extra-thoracic breath sound resulting from turbulent air flow in the larynx or lower in the bronchial tree. It is different from a stertor which is a noise originating in the pharynx. Stridor is a physical sign which is caused by a narrowed or obstructed airway. It can be inspiratory, expiratory or biphasic, although it is usually heard during inspiration. Inspiratory stridor often occurs in children with croup. It may be indicative of serious airway obstruction from severe conditions such as epiglottitis, a foreign body lodged in the airway, or a laryngeal tumor. Stridor should always command attention to establish its cause. Visualization of the airway by medical experts equipped to control the airway may be needed. Stridor may occur as a result of: foreign bodies (e.g., aspirated foreign body, aspirated food bolus); infections (e.g., epiglottitis, retropharyngeal abscess, croup); subglottic stenosis (e.g., following prolonged intubation or congenital); airway edema (e.g., following instrumentation of the airway, tracheal intubation, drug side effect, allergic reaction); laryngospasm (from aspiration, GERD, or complication of anesthesia) subglottic hemangioma (rare); vascular rings compressing the trachea; thyroiditis such as Riedel's thyroiditis; vocal cord palsy; tracheomalacia or tracheobronchomalacia (e.g., collapsed trachea). congenital anomalies of the airway are present in 87% of all cases of stridor in infants and children. vasculitis. infectious mononucleosis peritonsillar abscess Laryngeal edema is a common cause of stridor post extubation (occurring from pressure of the endotracheal tube on the mucosa as a result of endotracheal tube that is too large (e.g. pediatrics), cuff over inflation, and prolonged intubation times.); tumor (e.g., laryngeal papillomatosis, squamous cell carcinoma of larynx, trachea or esophagus); ALL (T-cell ALL can present with mediastinal mass that compresses the trachea and causes inspiratory stridor) Stridor is mainly diagnosed on the basis of history and physical examination, with a view to revealing the underlying problem or condition.

Deep learning parametric response mapping from inspiratory chest CT scans: a new approach for small airway disease screening

Jiancheng Yang, Zhiye Wang, Jun Lu, Zhigang Li, Lin Qi, Ming Li, Bo Du, Yuxuan Sun, Ziyi Liu

Objectives Parametric response mapping (PRM) enables the evaluation of small airway disease (SAD) at the voxel level, but requires both inspiratory and expiratory chest CT scans. We hypothesize that deep learning PRM from inspiratory chest CT scans can eff ...

London2023

Stride count and frequency measured with a wrist-worn inertial sensor

Kamiar Aminian, Benedikt Fasel, Cyntia Duc

This study proposes three simple approaches to estimate the stride count and frequency during walking and running using an inertial measurement system on the wrist. The approaches were based on a time-domain, frequency-domain and autocorrelation analysis, ...

2014

Hydrogen evolution across nano-Schottky junctions at carbon supported MoS2 catalysts in biphasic liquid systems

Hubert Girault, Xile Hu, Marco Cantoni, Pekka Eero Peljo, Micheal Diarmaid Scanlon, Peiyu Ge

The activities of a series of MoS2-based hydrogen evolution catalysts were studied by biphasic reactions monitored by UV/Vis spectroscopy. Carbon supported MoS2 catalysts performed best due to an abundance of catalytic edge sites and strong electronic coup ...

2012