Laryngoscopy and Stroboscopy

Laryngoscopy and Stroboscopy - Voice and Swallowing Doctor - Sunil Verma MD

Laryngoscopy

Laryngoscopy is examination of the throat using a small flexible camera, or endoscope. Laryngoscopy provides a view of the throat while a patient is performing normal actions such as breathing, speaking, coughing and swallowing.

Laryngoscopy may be performed through the nose or through the mouth.


Laryngoscopy through the nose uses a small thin endoscope. This is carefully passed through the nose, and then down behind the palate to examine the throat and larynx.

This may also be called ‘flexible fiberoptic laryngoscopy’ or distal chip endoscopy – both of these procedures are the same in terms of what a patient feels. The difference is the technology in the camera or endoscope used for the examination.

Laryngoscopy through the mouth may use a rigid angled telescope. A patient is seated in a sniffing position with the chin and face forward as if smelling a flower. The examiner holds the patient’s tongue and the endoscope is placed through the mouth. Images are recorded and portrayed on a computer screen.

Laryngoscopy may be performed for a number of reasons including:

Hoarseness
Sore throat
Pain in the throat
Reflux
Breathing difficulty
Post-nasal drip
Cough
Evaluation of cancer extent or spread

Laryngoscopy is the key to detecting of most throat disorders. Benign conditions, such as cysts and polyps, are detected through laryngoscopy. Similarly, leukoplakia and cancers are noted during laryngoscopy as well.

Stroboscopy

Stroboscopy is an examination of the vocal folds during phonation, or the production of sound. Stroboscopy is a basic examination that is performed for every patient with a “hoarse” voice.

Stroboscopy works on the principal that vocal folds vibrate between 100 and 300 times a second during normal sound production. The higher the pitch produced, the more often vocal folds oscillate. During stroboscopy a small microphone is placed along an individual’s neck to detect the frequency of the vocal folds. A small camera is placed either through the nose or through the mouth just above the vocal folds. The strobe light then flashes on and off as often as the vocal folds vibrate. This allows the examiner to view the intracices of vocal fold vibration and detect abnormalities like vocal fold scar, cysts, and polyps.

A stroboscopic examination of the larynx is often called “videostroboscopy.”

Dr-Verma - Voice and Swallowing Doctor - Sunil Verma MD

Throatdisorder.com is an online resource for patients and physicians to learn more about common voice, swallowing, breathing and throat disorders. Throat complaints, from cough to cancer, are a common reason for patients to seek medical treatment. This website developed as a result of Dr. Sunil Verma's passions: that of education, patient care, and interest in technology.

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NOTE : The information presented on this site is for educational purposes only, and is not intended to replace consultation with a qualified physician. It may not be appropriate to your individual case, and should not be used in making treatment decisions, especially with regard to medication. Considerable effort is made to ensure that the information on this site is accurate, but medicine is a changing field, and this website is not responsible for errors or omissions. Use of this website acknowledges the above.

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