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February 10, 2012

Laryngitis (cont.)

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Is laryngitis contagious?

Laryngitis is contagious if it is caused by an infection. If a respiratory infection or cold is caused by an infection, they are contagious. Laryngitis, upper respiratory infections, and colds are commonly a viral infection spread by aerosol droplets.

Covering the nose and mouth when coughing and sneezing, and proper hygiene habits (for example, washing the hands often) help prevent transmission of viruses.

How is laryngitis diagnosed?

The health care practitioner can often diagnose laryngitis quickly at the doctor's office. The history of upper respiratory tract infection associated with loss of voice is reinforced by the patient answering questions in a hoarse voice. The examination is often brief and limited to the ears, nose, and throat, looking for other potential causes of the cold-like symptoms. If the throat is red and there is a concern about a strep throat in addition to the laryngitis, a throat swab for a strep screen may be done.

If the hoarse voice becomes chronic, the health care practitioner may want to take a more detailed history, accessing reasons why the larynx and vocal cords have become inflamed for a prolonged period of time.

Questions may be asked about:

Most cases of laryngitis need no testing to confirm the diagnosis. In those patients with chronic laryngitis, the necessity for blood tests, X-rays and other diagnostic tests will depend upon the patient presentation and the potential concerns that the health care practitioner has regarding the cause of the hoarseness.

Laryngoscopy is the most common test performed to look directly at the vocal cords and evaluate their function. Using a thin tube containing a lighted fiberoptic camera inserted through the nose into the back of the throat, an otolaryngologist (ear, nose, and throat specialist) can see whether the vocal cords are inflamed, if there are any polyps or nodules growing on them, and if they move appropriately with breathing and speaking.


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