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Stridor (from Latin 'creaking/grating noise') is an extra-thoracic high-pitched 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.
Rhonchi are coarse rattling respiratory sounds, usually caused by secretions in bronchial airways. The sounds resemble snoring. "Rhonchi" is the plural form of the singular word "rhonchus". [8] Stridor: Wheeze-like sound heard when a person breathes. Usually it is due to a blockage of airflow in the windpipe (trachea) or in the back of the ...
Croup (/ k r uː p / KROOP), also known as croupy cough, is a type of respiratory infection that is usually caused by a virus. [2] The infection leads to swelling inside the trachea, which interferes with normal breathing and produces the classic symptoms of "barking/brassy" cough, inspiratory stridor and a hoarse voice. [2]
[3] [4] It is caused by partial obstruction of the upper airways, at the level of the nasopharynx or oropharynx. [1] It is distinguished from stridor by its pitch. [4] Stertor is low-pitched, and can occur when breathing in, out or both. [5] Stertor and stridor can occur together, such as when adenotonsillar hypertrophy and laryngomalacia occur ...
Laryngomalacia (literally, "soft larynx") is the most common cause of chronic stridor in infancy, in which the soft, immature cartilage of the upper larynx collapses inward during inhalation, causing obstruction of the airways.
The most common symptom of laryngotracheal stenosis is gradually-worsening breathlessness particularly when undertaking physical activities (exertional dyspnea).The patient may also experience added respiratory sounds which in the more severe cases can be identified as stridor but in many cases can be readily mistaken for wheeze.
Respiratory symptoms and signs that may be present include shortness of breath, wheezes, or stridor. [4] The wheezing is typically caused by spasms of the bronchial muscles [19] while stridor is related to upper airway obstruction secondary to swelling. [18] Hoarseness, pain with swallowing, or a cough may also occur. [15]
As the condition worsens, stridor and bluish skin may occur. [1] Epiglottitis was historically mostly caused by infection by H. influenzae type b (commonly referred to as "Hib"). [1] With vaccination, it is now more often caused by other bacteria, most commonly Streptococcus pneumoniae, Streptococcus pyogenes, or Staphylococcus aureus. [1]