PMID: 2502762Jul 1, 1989Paper

Pediatric cochlear implantation: strategies to accommodate for head growth

Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
D R MarksS Greenberg

Abstract

Accommodation for head growth presents one of several challenges unique to pediatric cochlear implantation. Given contemporary cochlear implant device designs, an electrode cable implanted at the age of 2 years must extend 2 to 3 cm as the head grows during childhood. In an initial study we found that model lead wires with redundant loops extended effectively when they were maintained within air-containing spaces such as the mastoid cavity or middle ear space. However, when looped leads traversed soft tissues overlying the parietal bone, they became embedded in fibrous tissue and did not extend. The present study evaluated three different configurations of expansile devices that were enclosed in polytetrafluoroethylene (PTFE) envelopes to deter fibrous ingrowth. This simple strategy was designed to ensure effective cable extension over cable pathlengths by protecting the redundant leads from any mechanically significant connective tissue ingrowth. Twelve such devices were implanted across the calvaria of four newly weaned piglets. Skull growth and changes in electrode dimensions were documented by sequential computed tomographic scans. At 3 months of age, cranial circumferences had increased substantially. Animals were then kil...Continue Reading

References

Jan 1, 1986·Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery·G M O'DonoghueR A Schindler
Jul 1, 1986·Acta Oto-laryngologica·G M O'DonoghueR A Schindler
Jul 1, 1986·The Annals of Otology, Rhinology, and Laryngology·T L Eby, J B Nadol
May 1, 1985·Ear and Hearing·K I Berliner, L S Eisenberg
Jan 1, 1969·Journal of Neurosurgery·R Hooper
Jul 1, 1980·The Annals of Otology, Rhinology, and Laryngology·R J Ruben, I Rapin

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Citations

May 15, 2018·Journal of Neural Engineering·Robert K ShepherdDavid A X Nayagam
Jul 1, 1991·Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery·R A HoffmanE Goldofsky
Apr 19, 2003·Acta Oto-laryngologica·Jona Kronenberg, Lela Migirov

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