Sudden Deafness: Quick Facts.* Description
* Additional Online Resources
Sudden Sensorineural Hearing Loss Sensorineural hearing loss
Hearing loss caused by damage to the nerves or parts of the inner ear governing the sense of hearing.
Mentioned in: Tinnitus
sensorineural hearing loss (SSHL SSHL Sigtuna Skolan Humanistiska Läroverket (Swedish private boarding school) ), or sudden deafness sudden deafness Audiology An abrupt hearing loss that follows a known cause of deafness–eg, an explosion, viral infection, or use of certain drugs , is a rapid loss of hearing. SSHL can happen to a person all at once or over a period of up to 3 days. It should be considered a medical emergency. A person who experiences SSHL should visit a doctor immediately.
A doctor can determine whether a person has experienced SSHL by conducting a normal hearing test. If a loss of at least 30 decibels in three connected frequencies is discovered, it is diagnosed as SSHL. A decibel decibel (dĕs`əbĕl', –bəl), abbr. dB, unit used to measure the loudness of sound. It is one tenth of a bel (named for A. G. Bell), but the larger unit is rarely used. is a measure of sound. A decibel level of 30 is half as loud as a normal conversation. A frequency is another way of measuring sound. Frequencies measure sound waves and help to determine what makes one sound different from another sound.
Hearing loss affects only one ear in 9 out of 10 people who experience SSHL. Many people notice it when they wake up in the morning. Others first notice it when they try to use the deafened deaf·en
v. deaf·ened, deaf·en·ing, deaf·ens
1. To make deaf, especially momentarily by a loud noise.
2. To make soundproof.
v.intr. ear, such as when they make a phone call. Still others notice a loud, alarming "pop" just before their hearing disappears. People with SSHL often experience dizziness or a ringing in their ears (tinnitus Tinnitus Definition
Tinnitus is hearing ringing, buzzing, or other sounds without an external cause. Patients may experience tinnitus in one or both ears or in the head. ), or both.
Some patients recover completely without medical intervention, often within the first 3 days. This is called a spontaneous recovery. Others get better slowly over a 1 or 2 week period. Although a good to excellent recovery is likely, 15 percent of those with SSHL experience a hearing loss that gets worse over time.
Approximately 4,000 new cases of SSHL occur each year in the United States. It can affect anyone, but for unknown reasons it happens most often to people between the ages of 30 and 60.
Though there are more than 100 possible causes of sudden deafness, it is rare for a specific cause to be precisely identified. Only 10 to 15 percent of patients with SSHL know what caused their loss. Normally, diagnosis is based on the patient's medical history. Possible causes include the following:
* Infectious diseases.
* Trauma, such as a head injury.
* Abnormal tissue growth.
* Immunologic diseases such as Cogan's syndrome.
* Toxic causes, such as snake bites.
* Ototoxic drugs (drugs that harm the ear).
* Circulatory problems.
* Neurologic causes such as multiple sclerosis.
* Relation to disorders such as Meniere's disease Mé·nière's disease
A pathological condition of the inner ear that is characterized by dizziness, ringing in the ears, and progressive loss of hearing. Also called auditory vertigo, endolymphatic hydrops, labyrinthine vertigo. .
People who experience SSHL should see a physician immediately. Doctors believe that finding medical help fast increases the chances for recovery. Several treatments are used for SSHL, but researchers are not yet certain which is the best for any one cause. If a specific cause is identified, a doctor may prescribe antibiotics for the patient. Or, a doctor may advise a patient to stop taking any medicine that can irritate or damage the ear.
The most common therapy for SSHL, especially in cases with an unknown cause, is treatment with steroids. Steroids are used to treat many different disorders and usually work to reduce inflammation, decrease swelling, and help the body fight illness. Steroid treatment helps some SSHL patients who also have conditions that affect the immune system immune system
Cells, cell products, organs, and structures of the body involved in the detection and destruction of foreign invaders, such as bacteria, viruses, and cancer cells. Immunity is based on the system's ability to launch a defense against such invaders. , which is the body's defense against disease.
Another common method that may help some patients is a diet low in salt. Researchers believe that this method aids people with SSHL who also have Meniere's disease, a hearing and balance disorder balance disorder Audiology A disturbance in equilibrium due to a disruption of the labryrinth. See Equilibrium. .
Two factors that help hearing function properly are good air and blood flow inside the ear. Many researchers now think that SSHL happens when important parts of the inner ear do not receive enough oxygen. A common treatment for this possible cause is called carbogen inhalation. Carbogen is a mixture of oxygen and carbon dioxide that seems to help air and blood flow better inside the ear. Like steroid therapy, carbogen inhalation does not help every patient, but some SSHL patients taking carbogen have recovered over a period of time.
Additional Online Resources American Academy of Otolaryngology-Head and Neck Surgery (AAO-HNS) 1 Prince Street Alexandria, VA 22314 Voice: (703) 519-1589 TTY: (703) 519-1585 Fax: (703) 299-1125 E-mail: firstname.lastname@example.org Self Help for Hard of Hearing People, Inc. (SHHH) 7910 Woodmont Avenue Suite 1200 Bethesda, MD 20814 Voice: (301) 657-2248 TTY: (301) 657-2249 Fax: (301) 913-9413 E-mail: email@example.com Alexander Graham Bell Association for the Deaf and Hard of Hearing (A.G. Bell) 3417 Volta Place, NW Washington, DC 20007 Voice/TTY: (202) 337-5220 Toll Free: (800) HEAR-KID Fax: (202) 337-8314 E-mail: AGBELL2@aol.com Association of Late Deafened Adults (ALDA) 10310 Main Street Box 274 Fairfax, VA 22030 Voice: (708) 524-0025 TTY: (404) 289-1596 (the ALDA Hotline) Fax: (404) 284-6862
CHID CHID Combined Health Information Database (NIH)
CHID Comparative History of Ideas (University of Washington degree program)
CHID Chemicals and Hazardous Installations Division (United Kingdom) database search
CHID is a database produced by health-related agencies of the Federal Government. This database provides titles, abstracts, and availability information for health information and health education resources. The value of this database is that it lists a wealth of health promotion and education materials and program descriptions that are not indexed elsewhere. Search the database using "sudden deafness" to view citations to journal articles, educational materials, and books on this topic.
PubMed database search
PubMed is a database developed by the National Library of Medicine in conjunction with publishers of biomedical bi·o·med·i·cal
1. Of or relating to biomedicine.
2. Of, relating to, or involving biological, medical, and physical sciences. literature as a search tool for accessing literature citations and linking to full-text journals at web sites of participating publishers. Search the database using "sudden deafness" for medical journal articles.
February 2000 NIH "Not invented here." See digispeak.
NIH - The United States National Institutes of Health. Pub. No. 00-4757
For more information, contact the NIDCD NIDCD National Institute on Deafness & other Communication Disorders Information Clearinghouse.
Health Information | Strategic Planning | Research Funding | Intramural intramural /in·tra·mu·ral/ (-mu´r'l) within the wall of an organ.
Occurring or situated within the walls of a cavity or organ. Research | News & Events | About NIDCD | FAQs | Site Index | Search | Contact Us | Home
National Institute on Deafness and Other Communication Disorders The National Institute on Deafness and Other Communication Disorders (NIDCD), a member of the U.S. National Institutes of Health, is mandated to conduct and support biomedical and behavioral research and research training in the normal and disordered processes of hearing, balance,
National Institutes of Health 31 Center Drive, MSC (1) (MSC.Software Corporation, Santa Ana, CA, www.mscsoftware.com) Founded in 1963 by Richard H. MacNeal and Robert G. Schwendler, MSC is the world's largest provider of mechanical computer aided engineering (MCAE) strategies, simulation software and services. 2320
Bethesda, MD USA 20892-2320