What is biphasic stridor?

Biphasic stridor occurs when your child breathes in and out, and it indicates a narrowing of the subglottis, the cartilage right below the vocal cords.

Does laryngomalacia cause biphasic stridor?

The differential diagnosis of persistent biphasic stridor in an infant includes severe laryngomalacia, tracheomalacia and, less commonly, vocal cord paresis (causing a hoarse cry), subglottic haemangioma (causing rapidly progressing stridor, sometimes associated with a facial haemangioma) and vascular ring.

Is stridor the same as laryngomalacia?

Laryngomalacia (LAYR inn go mah LAY shah) is also called laryngeal stridor. It results from a weakness of parts of the voice box (larynx) that is present at birth. This condition can cause a high-pitched sound called stridor (STRI der). You may hear this sound when your child breathes in.

Is laryngomalacia inspiratory or expiratory stridor?

In children, laryngomalacia is the most common cause of chronic stridor, while croup is the most common cause of acute stridor. Generally, an inspiratory stridor suggests airway obstruction above the glottis while an expiratory stridor is indicative of obstruction in the lower trachea.

What is biphasic wheeze?

Biphasic stridor (occurring during both the inspiratory and expiratory phases) indicates narrowing at the level of the glottis or subglottis, the point between the upper and lower airways.

What is the difference between laryngomalacia and tracheomalacia?

Both laryngomalacia and tracheomalacia are conditions affecting the airway. While laryngomalacia refers to floppy tissues above the voice box, tracheomalacia is characterized by floppy or weak cartilage of the windpipe. Tracheomalacia is far less common — and usually more serious — than laryngomalacia.

Is laryngomalacia life threatening?

Is laryngomalacia life threatening? Despite the associated noisy breathing, laryngomalacia is usually not dangerous, as most babies with the condition are still able to breathe. While most infants outgrow laryngomalacia, a few cases will require surgery to correct the issue.

How is laryngomalacia diagnosed?

How Is Laryngomalacia Diagnosed? Laryngomalacia can be suspected or presumptively diagnosed by history and physical exam. Diagnosis can be confirmed with In-Office Laryngoscopy/Nasopharyngoscopy in an awake child. This allows the dynamics of the voice box to be fully evaluated.

What is the difference between laryngomalacia and Tracheomalacia?

What stridor means?

Stridor is an abnormal, high-pitched, musical breathing sound. It is caused by a blockage in the throat or voice box (larynx). It is most often heard when taking in a breath.

What does a stridor indicate?

Less musical sounding than a wheeze, stridor is a high-pitched, turbulent sound that can happen when a child inhales or exhales. Stridor usually indicates an obstruction or narrowing in the upper airway, outside of the chest cavity.