The long-term effects of modified electrode surfaces and intracochlear corticosteroids on postoperative impedances in cochlear implant patients

Otology and Neurotology

Volumn 30, Issue 5, 2009, Pages 592-598

  Paasche, Gerrit ^a   Tasche, Claudia ^b   Stöver, Timo ^a   Lesinski Schiedat, Anke ^a   Lenarz, Thomas ^a  

^a HANNOVER MEDICAL SCHOOL   (Germany)

^b Research and Technology Labs   (Australia)

Author keywords

Cochlear implant; Contour electrode; Electrical stimulation; Iridium coated contacts; Postoperative impedance; Steroids; Stimulation effect; Tissue reaction

Indexed keywords

IRIDIUM; METAL OXIDE; TRIAMCINOLONE ACETONIDE; TRIAMHEXAL 40; UNCLASSIFIED DRUG;

ADULT; ARTICLE; BRAIN NUCLEUS; CLINICAL ARTICLE; COCHLEA; COCHLEA PROSTHESIS; CONTROLLED STUDY; ELECTRODE; ELECTROSTIMULATION; FEMALE; HUMAN; IMPEDANCE; IMPLANTATION; INTERMETHOD COMPARISON; MALE; PERCEPTION DEAFNESS; PEROPERATIVE CARE; POSTOPERATIVE PERIOD; PRIORITY JOURNAL; REHABILITATION CARE; SURFACE PROPERTY; TISSUE GROWTH;

ACOUSTIC IMPEDANCE TESTS; ADRENAL CORTEX HORMONES; ADULT; AGED; COCHLEA; COCHLEAR IMPLANTATION; COCHLEAR IMPLANTS; DATA INTERPRETATION, STATISTICAL; ELECTRIC STIMULATION; ELECTRODES; FEMALE; FOLLOW-UP STUDIES; HUMANS; INJECTIONS; MALE; MIDDLE AGED;

EID: 68849089967     PISSN: 15317129     EISSN: 15374505     Source Type: Journal    
DOI: 10.1097/MAO.0b013e3181ab8fba     Document Type: Article

References (23)

1. Strauss-Schier A, Battmer RD, Rost U, Allum-Mecklenburg DJ, Lenarz T. Speech-tracking results for adults. Ann Otol Rhinol Laryngol Suppl 1995;166:88-91.
2. Calmels MN, Saliba I, Wanna G, et al. Speech perception and speech intelligibility in children after cochlear implantation. Int J Pediatr Otorhinolaryngol 2004;68:347-351 (Pubitemid 38201619)
3. Blamey P, Pyman BC, Gordon M, et al. Factors predicting post-operative sentence scores in postlinguistically deaf adult cochlear implant patients. Ann Otol Rhinol Laryngol 1992;101:342-348
4. Shepherd RK, Hatsushika S, Clark GM. Electrical stimulation of the auditory nerve: the effect of electrode position on neural excitation. Hear Res 1993;66:108-120 (Pubitemid 23102403)
5. de Boer RW, van Oosterom A. Electrical properties of platinum electrodes: impedance measurements and time-domain analysis. Med Biol Eng Comput 1978;16:1-10.
6. Hyland M, Mailley S, Savanidis C, McLaughlin J, McAdams E. Thin film platinum and iridium oxide coatings applied to gold/flexible polymers for functional electrical stimulation electrodes. Proceedings of the 5th Annual Conference of the International Functional Electrical Stimulation Society. 2000. Center for Sensory-Motor Interaction (SMI), Aalborg University, Denmark, June 18-24, 2000.
7. Ruddy HA, Loeb GE. Influence of materials and geometry on fields produced by cochlear electrode arrays. Med Biol Eng Comput 1995;33:793-801.
8. Tykocinski M, Duan Y, Tabor B, Cowan RS. Chronic electrical stimulation of the auditory nerve using high surface area (HiQ) platinum electrodes. Hear Res 2001;159:53-68. (Pubitemid 32746938)
9. Peeters S, van Immerseel L, Zarowski A, Houben V, Govaerts P, Offeciers E. New developments in cochlear implants. Acta Otorhinolaryngol Belg 1998;52:115-127
10. Paasche G, Bockel F, Tasche C, Lesinski-Schiedat A, Lenarz T. Changes of postoperative impedances in cochlear implant patients: the short-term effects of modified electrode surfaces and intracochlear corticosteroids. Otol Neurotol 2006;27:639-647 (Pubitemid 44180475)
11. Lenarz T, Lesinski-Schiedat A, Weber B, Rost U, Tasche C, Battmer RD. Surgical Aspects and Preliminary Results with the Nucleus 24 k and the Nucleus Contour Electrode. 5th European Symposium on Paediatric Cochlear Implantation, Antwerp, 2000.
12. Xu J, Shepherd RK, Millard RE, Clark GM. Chronic electrical stimulation of the auditory nerve at high stimulus rates: a physiological and histopathological study. Hear Res 1997;105:1-29. (Pubitemid 27104532)
13. Tykocinski M, Saunders E, Cohen LT, et al. The Contour electrode array: safety study and initial patient trials of a new perimodiolar design. Otol Neurotol 2001;22:33-41. (Pubitemid 32184311)
14. van Wermeskerken GK, van Olphen AF, Smoorenburg GF. Intra-and postoperative electrode impedance of the straight and Contour arrays of the Nucleus 24 cochlear implant: relation to T and C levels. Int J Audiol 2006;45:537-544
15. Kawano A, Seldon HL, Clark GM, Ramsden RT, Raine CH. Intracochlear factors contributing to psychophysical percepts following cochlear implantation. Acta Otolaryngol (Stockh) 1998;118: 313-326 (Pubitemid 28273170)
16. De Ceulaer G, Johnson S, Yperman M, et al. Long-term evaluation of the effect of intra-cochlear steroid deposition on electrode impedance in cochlear implant patients. Otol Neurotol 2003;24:769-774 (Pubitemid 37122544)
17. Huang CQ, Shepherd RK. Reduction in excitability of the auditory nerve following electrical stimulation at high stimulus rates: V. Effects of electrode surface area. Hear Res 2000;146:57-71.
18. Busby PA, Plant KL, Whitford LA. Electrode impedance in adults and children using the Nucleus 24 cochlear implant system. Cochlear Implants Int 2002;3:87-103.
19. Huang CQ, Tykocinski M, Stathopoulos D, Cowan R. Effects of steroids and lubricants on electrical impedance and tissue response following cochlear implantation. Cochlear Implants Int 2007; 8:123-147 (Pubitemid 47500009)
20. Newbold C, Richardson R, Huang CQ, Milojevic D, Cowan RS, Shepherd RK. An in vitro model for investigating impedance changes with cell growth and electrical stimulation: implications for cochlear implants. J Neural Eng 2004;1:218-227 (Pubitemid 41079656)
21. Swanson B, Seligman P, Carter P. Impedance measurement of the Nucleus 22-electrode array in patients. Ann Otol Rhinol Laryngol Suppl 1995;166:141-144
22. Dorman MF, Smith LM, Dankowski K, McCandless G, Parkin JL. Long-term measures of electrode impedance and auditory thresholds for the Ineraid cochlear implant. J Speech Hear Res 1992;35: 1126-1130
23. Saunders E, Cohen LT, Aschendorff A, et al. Threshold, comfortable level and impedance changes as a function of electrode-modiolar distance. Ear Hear 2002;23:28S-40. (Pubitemid 34195172)