Atraumatic round window deep insertion of cochlear electrodes

Abstract Conclusion: This study shows that by using the round window approach and deep insertion, it is possible to reduce electrode insertion trauma (EIT), as indicated by the results of the hearing preservation marker. Objectives: In this prospective study EIT was evaluated in 42 subjects with low frequency hearing before surgery with 28 mm round window deep insertion. Methods: The degree of hearing preservation was a marker of EIT. Pure tone audiometry, monosyllable testing was conducted preoperatively and then at 3, 6, and 13 months after surgery. Results: Immediate hearing preservation (3 months postoperatively) was 92.9% (39/42). The surgery-related hearing preservation 13 months after surgery varied from 85% (34/40) to 90% (36/40). The ipsilateral implanted ear showed significant differences between preoperative and postoperative hearing thresholds (p < 0.005). Comparisons of thresholds for the control ear showed a significant difference between preoperative and postoperative thresholds tested 13 months after surgery (p < 0.05). When the subtraction factor of the mean contralateral hearing loss for each tested frequency for the same time interval was applied to the implanted ear, no significant hearing loss was found, showing that postoperative ipsilateral progressive hearing loss was caused by etiology rather than surgery.

[1]  Hinrich Staecker,et al.  Partial deafness cochlear implantation at the University of Kansas: techniques and outcomes. , 2010, Journal of the American Academy of Audiology.

[2]  A. Lorens,et al.  Results of Partial Deafness Cochlear Implantation Using Various Electrode Designs , 2009, Audiology and Neurotology.

[3]  A. Lorens,et al.  Outcomes of Treatment of Partial Deafness With Cochlear Implantation: A DUET Study , 2008, The Laryngoscope.

[4]  C. Luetje,et al.  Hybrid Cochlear Implantation: Clinical Results and Critical Review in 13 Cases , 2007, Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology.

[5]  Robert K. Shepherd,et al.  Does cochlear implantation and electrical stimulation affect residual hair cells and spiral ganglion neurons? , 2007, Hearing Research.

[6]  P. van de Heyning,et al.  Outcomes in adults implanted with the FLEXsoft electrode , 2007, Acta oto-laryngologica.

[7]  Anna Piotrowska,et al.  Preservation of low frequency hearing in partial deafness cochlear implantation (PDCI) using the round window surgical approach , 2007, Acta oto-laryngologica.

[8]  Fred F Telischi,et al.  Conservation of Residual Acoustic Hearing After Cochlear Implantation , 2006, Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology.

[9]  Thomas Lenarz,et al.  Temporal Bone Results and Hearing Preservation with a New Straight Electrode , 2006, Audiology and Neurotology.

[10]  Jan Kiefer,et al.  Impact of electrode insertion depth on intracochlear trauma , 2006, Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery.

[11]  Thomas Lenarz,et al.  Residual Hearing Conservation and Electroacoustic Stimulation with the Nucleus 24 Contour Advance Cochlear Implant , 2006, Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology.

[12]  Donald K. Eddington,et al.  Effect of Cochlear Implantation on Residual Spiral Ganglion Cell Count as Determined by Comparison with the Contralateral Nonimplanted Inner Ear in Humans , 2005, The Annals of otology, rhinology, and laryngology.

[13]  F. Telischi,et al.  Pattern Of Hearing Loss In A Rat Model Of Cochlear Implantation Trauma , 2005, Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology.

[14]  Jan Kiefer,et al.  Combined Electric and Acoustic Stimulation of the Auditory System: Results of a Clinical Study , 2005, Audiology and Neurotology.

[15]  Kumiko Yukawa,et al.  Effects of Insertion Depth of Cochlear Implant Electrodes upon Speech Perception , 2004, Audiology and Neurotology.

[16]  Anna Piotrowska,et al.  [New method of partial deafness treatment]. , 2003, Otolaryngologia polska = The Polish otolaryngology.

[17]  M. Pronicki,et al.  Living related donor liver transplantation from Hepatitis B core antibody positive donor , 2003 .

[18]  Peter Nopp,et al.  Deep electrode insertion in cochlear implants: apical morphology, electrodes and speech perception results. , 2003, Acta oto-laryngologica.

[19]  Anna Piotrowska,et al.  Preservation of Residual Hearing in Children and Post-Lingually Deafened Adults after Cochlear Implantation: An Initial Study , 2002, ORL.

[20]  B. Reimer,et al.  Results of cochlear implantation in patients with severe to profound hearing loss--implications for patient selection. , 1998, Audiology : official organ of the International Society of Audiology.

[21]  Thomas R. Van De Water,et al.  Brain-derived neurotrophic factor gene therapy prevents spiral ganglion degeneration after hair cell loss , 1998, Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery.

[22]  A Pruszewicz,et al.  [New articulation lists for speech audiometry. Part I]. , 1994, Otolaryngologia polska = The Polish otolaryngology.

[23]  A Pruszewicz,et al.  [New articulation lists for speech audiometry. Part II]. , 1994, Otolaryngologia polska = The Polish otolaryngology.