Nineteen adults and 9 children who received a unilateral cochlear implant between 2002 and 2007 were included in the study. All subjects were preoperatively diagnosed with significant residual hearing in low frequencies, termed as ‘partial deafness’, and were implanted according to a 6-step round window surgical technique for partial deafness cochlear implantation. Hearing was preserved to a great extent in the partial deafness cochlear implantation (PDCI) group. After a short period following activation of the cochlear implant, highly significant improvement in the recognition of monosyllabic words was observed. With a developed round window surgical procedure and limited electrode insertion, hearing can be preserved in the majority of patients with partial deafness. PDCI is a feasible means of treating individuals who have good low-frequency hearing but severe to profound hearing loss in the mid to high frequencies.

Adunka O, Unkelbach MH, Mack M, Hambek M, Gstoettner W, Kiefer J: Cochlear implantation via the round window membrane minimizes trauma to cochlear structures: a histologically controlled insertion study. Acta Otolaryngol 2004;124:807–812.
Briggs RJ, Tykocinski M, Stidham K, Robertson JB: Cochleostomy site: implications for electrode placement and hearing preservation. Acta Otolaryngol 2005;125:870–876.
Brimacombe JA, Arndt PE, Staller SJ, et al: Multichannel cochlear implantation in adults with severe to profound sensori-neural hearing loss; in Hochmair-Desoyer I, Hochmair E (eds): Cochlear Implants. Wien, Manz, 1994, pp 387–392.
Cullen RD, Higgins C, Buss E, Clark M, Pillsbury HC, Buchman CA: Cochlear implantation in patients with substantial residual hearing. Laryngoscope 2004;114:2218–2223.
Gantz BJ, Turner C: Combining acoustic and electrical speech processing: Iowa/Nucleus hybrid implant. Acta Otolaryngol 2004;124:344–347.
Gantz BJ, Turner C, Gfeller KE: Acoustic plus electric speech processing: preliminary results of a multicenter clinical trial of the Iowa/Nucleus Hybrid implant. Audiol Neurootol 2006;11(suppl 1):63–68.
Gstoettner W, Kiefer J, Baumgartner W, Pok S, Peters S, Adunka O: Hearing preservation in cochlear implantation for electric acoustic stimulation. Acta Otolaryngol 2004;124:348–352.
Gstoettner W, Helbig S, Maier N, Kiefer J, Radeloff A, Adunka O: Ipsilateral electric acoustic stimulation of the auditory system: results of a long term hearing preservation. Audiol Neurootol 2006;11(suppl):49–56.
James CJ, Fraysse B, Deguine O, Lenarz T, Mawman D, Ramos A, Ramsden R, Sterkers O: Combined electroacoustic stimulation in conventional candidates for cochlear implantation. Audiol Neurootol 2006;11(suppl 1):57–62.
Kiefer J, Pok M, Adunka O, Sturzebecher E, Baumgartner W, Schmidt M, Tillein J, Ye Q, Gstoettner W: Combined electric and acoustic stimulation of the auditory system: results of a clinical study. Audiol Neurootol 2005;10:134–144.
Lenarz T: Cochlear implants: selection criteria and shifting borders. Acta Otorhinolaryngol Belg 1998;52:183–199.
Lenarz T, Stover T, Buechner A, Paasche G, Briggs R, Risi F, Pesch J, Batmer RD: Temporal bone results and hearing preservation with a new straight electrode. Audiol Neurootol 2006;11(suppl):34–41.
Li PM, Somdas MA, Eddington DK, Nadol JB Jr: Analysis of intracochlear new bone and fibrous tissue formation in human subjects with cochlear implants. Ann Otol Rhinol Laryngol 2007;116:731–738.
Lorens A, Geremek A, Walkowiak A, Skarżyński H: Residual acoustic hearing in the ear before and after cochlear implantation; in Jahnke K, Fischer M (eds): Fourth European Congress of Oto-Rhino-Laryngology Head and Neck Surgery, vol 1. Bologna, Monduzzi, 2000, pp 135–138.
Lorens A, Polak M, Piotrowska A, Skarzynski H: Outcomes of treatment of partial deafness with cochlear implantation: a DUET study. Laryngoscope 2008;118:288–294.
Nadol JB Jr, Eddington DK: Histopathology of the inner ear relevant to cochlear implantation. Adv Otorhinolaryngol 2006;64:31–49.
Pruszewicz A, Demenko G, Richter L, Wika T: New articulation lists for speech audiometry. Part II (in Polish). Otolaryngol Pol 1994;48:56–62.
Rizer FM: A postoperative audiometric evaluation of cochlear implant patients. Otolaryngol Head Neck Surg 1988;98:203–206.
Roland PS, Wright CG: Surgical aspects of cochlear implantation: mechanisms of insertional trauma. Adv Otorhinolaryngol 2006;64:11–30.
Skarżyński H, Lorens A, D’Haese P, et al: Preservation of residual hearing in children and post-lingually deafened adults after cochlear implantation: an initial study. ORL J Otorhinolaryngol Relat Spec 2002;64:247–253.
Skarzynski H, Lorens A, Piotrowska A: A new method of partial deafness treatment. Med Sci Monit 2003;9:CS20–CS24.
Skarzynski H, Lorens A, Piotrowska A, Anderson I: Partial deafness cochlear implantation provides benefit to a new population of individuals with hearing loss. Acta Otolaryngol 2006;126:934–940.
Skarzynski H, Lorens A, Piotrowska A, Anderson I: Preservation of low frequency hearing in partial deafness cochlear implantation (PDCI) using the round window surgical approach. Acta Otolaryngol 2007a;127:41–48.
Skarzynski H, Lorens A, Piotrowska A, Anderson I: Partial deafness cochlear implantation in children. J Pediatr Otorhinolaryngol 2007b;71:1407–1413.
von Ilberg C, Kiefer J, Tillien J, et al: Electric-acoustic-stimulation (EAS) of the auditory system: new technology against severe hearing loss. ORL J Otorhinolaryngol Relat Spec 1999;61:334–340.
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