bacterial meningitis and cochlear implants jordan hoel, calvin keyes, dustin movinsky, erica whitson
TRANSCRIPT
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Bacterial Meningitis and Cochlear Implants
Jordan Hoel, Calvin Keyes,Dustin Movinsky,Erica Whitson
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Cochlear Implants
• Cochlear implants are a surgically implanted electronic device that provide a sense of sound to profoundly deaf or severely hard of hearing individuals.
• Older versionsof cochlear implants use “positioners”.
Photo courtesy of “http://thinkorthwim.com/ “
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Cochlear Implants
• Positioners were used to facilitate electrical currents by holding the implant up against the wall of the cochlea.
• These cochlear implants were discontinued after 2002, but were in manufacture between 1999 and July 2002.
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Bacterial Meningitis
• Meningitis is an inflammation of the cerebrospinal fluid (CSF).
• Most cases of bacterial meningitis are caused by Streptococcus pneumoniae.
• While not specific to this strain of bacterium, the meningococcal polysaccharide vaccine (MPSV4) can help lower the risk of infection.
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Bacterial Meningitis
• Symptoms of meningitis usually appear three to seven days after exposure.
• Severe headaches, stiff neck muscles and fever are the most common symptoms but also nausea, sensitivity to light and vomiting have been reported.
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Linking Bacterial Meningitis & Cochlear ImplantsA 2004 Study, «Bacterial Meningitis
Among Children With Cochlear Implants Beyond 24 Months After Implantation » found that the inclusion of a positioner increased the risk of contracting bacterial meningitis.
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Linking Bacterial Meningitis & Cochlear ImplantsThe 2004 results were taken from a
cohort of 4265 children, only 829 of which had positioners, as shown in the graphic below.
Photo courtesy of Pediatrics Journal.
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Linking Bacterial Meningitis & Cochlear Implants• During the 2004 study only 12
new cases of bacterial meningitis were reported.
• Of those 12, 11 had implants that included positioners.
• Positioners do not cause meningitis, they simply increase the risk of infection.
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Bibliography• Biernath, Krista, Reefhuis, Jennita,
Whitney, Cynthia, Mann, Eric, & Costa, Pamela. (2006). Bacterial meningitis among children with cochlear implants beyond 24 months after implantation. Pediatrics, retrieved from “http://www.pediatrics.org/cgi/content/full/117/2/284”.
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Bibliography• Centers for Disease Control and
Prevention. (2009, June 29). CDC - Meningitis: Topic Home. Retrieved from http://www.cdc.gov/meningitis/index.html