Cochlear Implantation ; methods ; Cochlear Implants ; Models, Anatomic

Cochlear Implantation ; methods ; Cochlear Implants ; Humans ; Minimally Invasive Surgical Procedures

Refinement of surgical techniques has allowed hearing preservation after tumor resection to be prioritized. Moreover, restoration of hearing after tumor removal can be attempted in patients with bilateral vestibular schwannomas or those with a schwannoma in the only-hearing ear. Cochlear implantation (CI) has emerged as a proper method of acoustic rehabilitation, provided that the cochlear nerve remains intact. Studies of electrical promontory stimulation in patients after vestibular schwannoma resection have demonstrated favorable results. We describe herein two cases of hearing rehabilitation via CI implemented at the time of vestibular schwannoma resection. Tumors were totally removed, and cochlear implant electrodes were successfully inserted in both cases. Also, post operative CI-aided hearing showed improved results.
Acoustics ; Cochlear Implantation* ; Cochlear Implants* ; Cochlear Nerve ; Ear ; Electrodes ; Hearing ; Humans ; Methods ; Neurilemmoma ; Neuroma, Acoustic* ; Rehabilitation

Cochlear implantation has gradually been accepted as an effective treatment for many patients with severe to pround sensorineural hearing loss. The traditional cochlear implantation does not exist up to expectations in some respects. With the soft surgery technique brought forward, the idea of minimally invasive cochlear implantation is deely rooted among the people. Now many institutions are carring out a series of clinical researches and practices to improve the results of cochlear implantation surgery and reduce the complications around the world. It includes minimally invasive approach, cochleostomy and electrode insertion techniques, especially the latter two affect the preservation of residual hearing. This article is a review of the advances in minimally invasive cochlear implantation from the above three aspects.
Cochlear Implantation ; methods ; Cochlear Implants ; Electrodes, Implanted ; Hearing ; Humans ; Minimally Invasive Surgical Procedures ; methods

Objective:To report the experience of using CT-guided cochlear implant surgery in difficult cases such as severe inner ear deformities and anatomical abnormalities, and to discuss the application value of intraoperative CT-assisted localization in difficult cases of cochlear implant surgery. Methods:Retrospectively analyzed the clinical data of 23 cases of difficult cochlear implant surgery cases completed by our team with the assistance of intraoperative CT, and collected their medical data, including preoperative imaging manifestations, surgical conditions, and intraoperative imaging images for evaluation. Results:During the study period, 23 difficult cases（27 ears） underwent cochlear implantation under the guidance of intraoperative CT, and 4 cases were bilaterally implanted. Including 6 cases of incomplete segmentation type Ⅰ（IP-Ⅰ）, 1 case of incomplete segmentation type Ⅱ（IP-Ⅱ）, 10 cases of incomplete segmentation type Ⅲ（IP-Ⅲ）, 3 cases of common cavity deformity（CC） and 3 cases of cochlear ossification after meningitis. Facial nerve anatomy was abnormal in 9 cases, cerebrospinal fluid "blowout" was serious in 14 cases, electrode position was abnormal in 3 cases requiring intraoperative adjustment of electrode position, anatomical difficulties required intraoperative CT to assist in finding anatomical landmarks in 2 cases, and electrodes were not fully implanted in 3 cases. Conclusion:When faced with difficult cases with challenging and complex temporal bone anatomy, intraoperative CT can accurately evaluate the electrode position and provide intraoperative anatomical details, allowing immediate adjustment of the electrode position if necessary, providing safety guarantee for difficult cases of cochlear implant surgery and ensure accurate implantation of electrodes.
Humans ; Cochlear Implantation/methods* ; Retrospective Studies ; Tomography, X-Ray Computed/methods* ; Cochlea ; Cochlear Implants

Cochlear Implantation ; adverse effects ; methods ; rehabilitation ; Hearing Tests ; Humans

OBJECTIVETo develop an imaging system suitable for cochlear implant research on small laboratory animals.

METHODSA novel micro-focus X-ray imaging system was developed. The key features of the system were the use of a micro-focus X-ray source (less than 10 micrometers) and an appropriate choice of source-object and object-image distance. The new X-ray modality was evaluated on heads of cats, guinea pigs and rats.

RESULTSIt proved to be an useful tool to provide excellent image of small animal cochlea, allowing a clear electrode position to be established, and also helped greatly in detecting the breakage of electrode array.

CONCLUSIONSExperimental studies performed in cats, guinea pigs and rats confirmed that micro-focus radiography was an important tool for cochlear implant research in laboratory

Animals ; Cats ; Cineradiography ; methods ; Cochlea ; diagnostic imaging ; Cochlear Implantation ; Cochlear Implants ; Guinea Pigs ; Rats ; X-Rays

OBJECTIVE: To study the effect of binaural bi-modal fitting (one cochlear implant and a contralateral hearing aid) on speech recognition of cochlear implant recipients with low frequency electrodes incompletely implanted. METHOD: A total of 15 cochlear implant(CI) users who have low residual hearing (250 Hz 45-90 dBHL, 500 Hz 75 - 100 dBHL) of their non surgery ears. We closed the top three electrodes to simulate the state of low-frequency electrodes incompletely implanted by fitting software. (1) The same tester received twice speech recognition tests in incompletely implanted state, one test used single CI model and the other used binaural bi-modal fitting model. (2)The same tester received above twice speech recognition tests again, but in completely implanted state. Then we compared the results of tests. RESULT: The CI users used binaural bi-modal fitting have higher speech recognition score than the same users used unilateral cochlear implant model in low-frequency electrodes incompletely implanted state(P<0. 05). The gap between the scores of the tests by using two usage patterns in low frequency electrodes incompletely implanted state was more than that in completely implanted state (P<0. 05). CONCLUSION Binaural bi-modal fitting can help CI users to improve their speech recognition ability in low-frequency electrodes incompletely implanted state.
Cochlear Implantation ; methods ; Cochlear Implants ; Electrodes, Implanted ; Hearing ; Hearing Aids ; Hearing Tests ; Humans ; Speech ; Speech Perception

BACKGROUND AND OBJECTIVES: ObjectivesZZAlthough many studies have shown that cochlear implantation promotes restoration of adequate hearing and verbal ability, there is little research showing whether patients with cochlear implants (CI) adapted well to the society by forming a good interpersonal relationship. The purpose of this study was to investigate the interpersonal competence of college students who acquired good verbal ability through CI. SUBJECTS AND METHOD: Interpersonal competence was examined using the Korean version of interpersonal competence questionnaire. Participants were 23 college students with CI who had good verbal communication abilities. Their interpersonal competence was compared to that of 28 college students with normal hearing (NH). To identify the factors contributing to the interpersonal competence, regression analysis was performed using speech perception, vocabulary and speech intelligibility as independent variables. RESULTS: College students with CI showed significantly weaker interpersonal competence than those with NH. Among 5 sub-factors of interpersonal competence, assertion and conflict management were not significantly different between two groups and initiation, caring others, and appropriate disclosure of CI group were significantly weaker than NH group. But college students with CI who had normal vocabulary and Speech Intelligibility Ratings score of 5 showed good interpersonal competence, which was comparable to those with NH. CONCLUSION: College students with CI who acquired good verbal communication ability demonstrates lower interpersonal competence than those with NH. Therefore, it is necessary to support them to improve interpersonal competence as well as speech-language ability.
Cochlear Implantation ; Cochlear Implants* ; Communication ; Disclosure ; Hearing ; Humans ; Mental Competency* ; Methods ; Speech Intelligibility ; Speech Perception ; Vocabulary

BACKGROUND AND OBJECTIVES: The objective of this study was to examine the effect of early cochlear implantation (CI) performed in infants less than 12 months of age. SUBJECTS AND METHOD: Twenty-five children who received their first CI before 12 months of age were included in this study (infant group). The speech perception and language outcomes of these children were compared with those of 14 children who received their first CI between 13 and 24 months of age (older group). All children received sequential bilateral CI with the inter-stage interval of less than 2 years. Speech perception was measured using Categories of Auditory Performance, monosyllabic word test and sentence test, and language ability was measured using Sequenced Language Scale for Infants, Preschool Receptive-Expressive Language Scale, or Receptive & Expressive Vocavulary Test, depending on the age at the time of testing. RESULTS: There were no significant differences in speech perception abilities between the infant group and the older group. The mean expressive language score of infant group was higher than that of the older group, but the difference was not statistically significant. However, the receptive language score of infant group was significantly higher than that of the older group. CONCLUSION: Children who received CI before 12 months of age achieved better receptive language ability than those who received it after 12 months of age. Thus CI should be performed as early as before 12 months of age to achieve better language ability.
Child* ; Cochlear Implantation ; Cochlear Implants* ; Humans ; Infant ; Language ; Methods ; Speech Perception*