stertorous breathing
Mia Lopez
Updated on July 26, 2026
Stertor’ is noisy breathing which occurs above the larynx. ‘Stridor’ is noisy breathing that occurs at the level of the larynx or below. Stridor can be further subdivided as inspiratory (level of the supraglottis), expiratory (level of the glottis), and biphasic (level of the subglottis or trachea).
What does stridor breathing mean?
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.
What does wheezing in lungs indicate?
Wheezing is the shrill whistle or coarse rattle you hear when your airway is partially blocked. It might be blocked because of an allergic reaction, a cold, bronchitis or allergies. Wheezing is also a symptom of asthma, pneumonia, heart failure and more.
What are the 4 respiratory sounds?
The 4 most common are:
Rales. Small clicking, bubbling, or rattling sounds in the lungs. They are heard when a person breathes in (inhales). Rhonchi. Sounds that resemble snoring. Stridor. Wheeze-like sound heard when a person breathes. Wheezing. High-pitched sounds produced by narrowed airways.
What is stridor vs wheezing?
Wheezing is a musical sound produced primarily during expiration by airways of any size. Stridor is a single pitch, inspiratory sound that is produced by large airways with severe narrowing; it may be caused by severe obstruction of any proximal airway (see A through D in the differential diagnosis outline below).
Is stridor life threatening?
If left untreated, stridor can block the child’s airway. This can be life-threatening or even cause death.
What is the most common cause of stridor?
Stridor is a sign of upper airway obstruction. In children, laryngomalacia is the most common cause of chronic stridor, while croup is the most common cause of acute stridor.
Is stridor a medical emergency?
Inspiratory stridor is often a medical emergency. Assessment of vital signs and degree of respiratory distress is the first step. In some cases, securing the airway may be necessary before or in parallel with the physical examination.
What are the 3 main causes of wheezing?
However, any inflammation in your throat or larger airways can cause wheezing. Common causes include infection, an allergic reaction or a physical obstruction, such as a tumor or a foreign object that’s been inhaled.
Is wheezing serious?
Mild wheezing that occurs along with symptoms of a cold or upper respiratory infection (URI), does not always need treatment. See a doctor if you develop wheezing that is unexplained, keeps coming back (recurrent), or is accompanied by any of the following signs and symptoms: Difficulty breathing. Rapid breathing.
How do I stop wheezing?
Self-care measures
Moisturize the air. Use a humidifier, take a steamy shower or sit in the bathroom with the door closed while running a hot shower. Drink fluids. Warm liquids can relax the airway and loosen up sticky mucus in your throat.Avoid tobacco smoke. Take all prescribed medications.
What are 3 types of normal breath sounds?
Breath sounds are classified into normal tracheal sound, normal lung sound or vesicular breath sounds, and bronchial breath sound.
What is the sound of stridor?
Stridor is a high-pitched squeaking or whistling sound, usually due to an obstruction in an airway.
What is Crepitation sound?
Crepitus in the lungs refers to the sound and sensation associated with subcutaneous emphysema, a condition in which air is trapped under the skin. It is characterized by the palpable or audible popping, crackling, grating, or crunching sensation that can occur when air is pushed through the soft tissue in the chest.
Is stridor on inhale or exhale?
Stridor is a high-pitched sound heard best when your child is breathing in (inhaling). It can also be heard when your child is breathing out (exhaling). Noisy breathing, or stridor, is most often a symptom of a throat or airway problem.
What can cause stridor in adults?
In adults, reasons for stridor typically include issues with your airway, vocal cords, or voice box, such as:
An abscess (a fluid-filled sore)Swelling.Vocal cord problems like an injury or paralysis.Allergies.Growths such as tumors.Inhaling food or an object.Surgery to your thyroid, chest, or esophagus.
Is stridor a symptom of asthma?
Stridor: Causes and possible diseases in adults
In adults, expiratory stridor is more common. The causes of stridor often are associated with the bronchi and the lungs. The causes of expiratory stridor in adults often include diseases of the respiratory tracts, which make exhalation difficult: Bronchial asthma.