Quality Control after Cochlear Implant Surgery by Means of Rotational Tomography

Aschendorff, Antje; Kubalek, Ralf; Turowski, Bernd; Zanella, Friedhelm E.; Hochmuth, A; Schumacher, Martin; Klenzner, T.; Laszig, Roland

doi:10.1097/00129492-200501000-00007

Cited by 147 publications

(132 citation statements)

References 8 publications

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“…75,81 A recent study has also explored the utility of CBCT in evaluating progressive hearing loss. Dalchow et al 82 submitted 25 patients with audiometry-confirmed conductive hearing loss to preoperative CBCT and concluded that CBCT could be accurate both in predicting the continuity of the ossicular chain and in detecting ossicular erosions.…”

Section: Sinus Imaging/frontal Recessmentioning

confidence: 99%

Conebeam CT of the Head and Neck, Part 2: Clinical Applications

Miracle¹,

Mukherji²

2009

AJNR Am J Neuroradiol

300

207

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SUMMARY: Conebeam x-ray CT (CBCT) is being increasingly used for point-of-service head and neck and dentomaxillofacial imaging. This technique provides relatively high isotropic spatial resolution of osseous structures with a reduced radiation dose compared with conventional CT scans. In this second installment in a 2-part review, the clinical applications in the dentomaxillofacial and head and neck regions will be explored, with particular emphasis on diagnostic imaging of the sinuses, temporal bone, and craniofacial structures. Several controversies surrounding the emergence of CBCT technology will also be addressed. C onebeam CT (CBCT) is an advancement in CT imagingthat has begun to emerge as a potentially low-dose crosssectional technique for visualizing bony structures in the head and neck. The physical principles, image quality parameters, and technical limitations relevant to CBCT imaging were discussed in Part 1 of this 2-part series. The second part presented here will highlight the evidence related to CBCT applications in head and neck as well as dentomaxillofacial imaging. Controversial aspects of this technology will also be addressed, including limitations in image quality and its often officebased operational model.CBCT was first adapted for potential clinical use in 1982 at the Mayo Clinic Biodynamics Research Laboratory. 1 Initial interest focused primarily on applications in angiography in which soft-tissue resolution could be sacrificed in favor of high temporal and spatial-resolving capabilities. Since that time, several CBCT systems have been developed for use both in the interventional suite and for general applications in CT angiography. 2,3 Exploration of CBCT technologies for use in radiation therapy guidance began in 1992, 4,5 followed by integration of the first CBCT imaging system into the gantry of a linear accelerator in 1999. 6 The first CBCT system became commercially available for dentomaxillofacial imaging in 2001 (NewTom QR DVT 9000; Quantitative Radiology, Verona, Italy). Comparatively low dosing requirements and a relatively compact design have also led to intense interest in surgical planning and intraoperative CBCT applications, particularly in the head and neck but also in spinal, thoracic, abdominal, and orthopedic procedures. [7][8][9][10][11] Diagnostic applications in CT mammography and head and neck imaging are also under evaluation. 12-14 The technical and clinical considerations pertaining to CBCT imaging in many of these applications have been the subjects of several recent reviews. [15][16][17][18][19] The recent review by Dörfler et al 16 of the neurointerventional applications of CBCT is of particular interest to the field of neuroradiology.The discussion below will focus on the diagnostic and treatment-planning applications of CBCT in dentomaxillofacial and head and neck imaging. Commercially available CBCT systems for dentomaxillofacial imaging include the CB MercuRay and CB Throne (Hitachi Medical, Kashiwi-shi, Chiba-ken, Japan), 3D Accuitomo products (J. Mor...

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Section: Sinus Imaging/frontal Recessmentioning

confidence: 99%

Conebeam CT of the Head and Neck, Part 2: Clinical Applications

Miracle¹,

Mukherji²

2009

AJNR Am J Neuroradiol

300

207

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“…For this reason we feel that it will be necessary for manufacturers to approach the development of future electrodes with a very broad view that includes a critical examination of current electrodes, anatomy of the ST, the surgical approach, surgical instrumentation and device specific training for surgeons. We envision that advances in imaging will allow both improved speech processor fitting by documenting the unique position of each electrode within the cochlea and increased safety by giving the surgeon detailed feedback after each surgery [158][159][160]. With the application of successful design features from current electrodes and improved surgical training and instrumentation, it appears that relatively modest modifications of the current designs will ensure routine atraumatic electrode insertion to a depth of up to 400°.…”

Section: Future Intracochlear Electrode Arraysmentioning

confidence: 99%

Cochlear Implants: System Design, Integration, and Evaluation

Zeng

Rebscher

Harrison³

et al. 2008

IEEE Rev. Biomed. Eng.

655

198

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As the most successful neural prosthesis, cochlear implants have provided partial hearing to more than 120,000 persons worldwide; half of which being pediatric users who are able to develop nearly normal language. Biomedical engineers have played a central role in the design, integration and evaluation of the cochlear implant system, but the overall success is a result of collaborative work with physiologists, psychologists, physicians, educators, and entrepreneurs. This review presents broad yet in-depth academic and industrial perspectives on the underlying research and ongoing development of cochlear implants. The introduction accounts for major events and advances in cochlear implants, including dynamic interplays among engineers, scientists, physicians, and policy makers. The review takes a system approach to address critical issues from design and specifications to integration and evaluation. First, the cochlear implant system design and specifications are laid out. Second, the design goals, principles, and methods of the subsystem components are identified from the external speech processor and radio frequency transmission link to the internal receiver, stimulator and electrode arrays. Third, system integration and functional evaluation are presented with respect to safety, reliability, and challenges facing the present and future cochlear implant designers and users. Finally, issues beyond cochlear implants are discussed to address treatment options for the entire spectrum of hearing impairment as well as to use the cochlear implant as a model to design and evaluate other similar neural prostheses such as vestibular and retinal implants.

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“…[16,17] Aschendorff ve ark. [18] elektrot yerleşim derinliğinin, Eisenberg ve ark. [17] ise tek kanallı implantın ameliyat sonrası denge ve vestibüler semptomlar üzerine olası bir etkisinin olmadığını belirtmişlerdir.…”

Section: Discussionunclassified

Long-term vestibular evoked myogenic potential responses in children with cochlear implant

Topal¹

2017

Kulak Burun Bogaz Ihtis Derg

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ÖZAmaç: Bu çalışmada koklear implant cerrahisi uygulanan hastalarda vestibüler sistemin işlevleri vestibüler uyarılmış miyojenik potansiyeller (VEMP) üzerinden uzun dönemde değerlendirildi. Hastalar ve Yöntemler:Çalışmamıza koklear implant cerrahisi sonrası en az bir yıldır takip edilen 18 yaş altı 35 hasta (19 erkek, 16 kız; ort. yaş 13.0±3.6 yıl; dağılım 5-18 yıl) dahil edildi. Kontrol grubu, öyküsünde vestibüler sistemle ilgili herhangi bir yakınması olmayan 35 gönüllü 18 yaş altı sağlıklı birey (21 erkek, 14 kız; ort. yaş 14.6±3.2 yıl; dağılım 5-18 yıl) içerdi. Çalışma ve kontrol grubunun her iki kulaklarından elde edilen servikal ve oküler VEMP yanıtları gruplar arasında karşılaştırıldı. Bulgular:Koklear implantlı çocuklarda servikal VEMP dalgası elde edilme oranları ameliyat edilen ve karşı taraf kulaklar arasında istatistiksel olarak anlamlı bir farklılık göstermedi (p=0.802). Koklear implantlı çocuklarda ameliyat edilen ve karşı taraf kulaklar arasında oküler VEMP dalgası elde edilme oranlarında da anlamlı bir farklılık yoktu (p=0.078). Kontrol grubundaki çocukların kulaklarında servikal VEMP ve oküler VEMP dalgaları, implantlı hastaların hem ameliyat edilen hem karşı taraf kulaklarına kıyasla anlamlı olarak daha yüksek oranda elde edildi (p<0.001).Sonuç: Bu çalışmada, koklear implantlı hastaların uzun dönem takiplerinde sağlıklı kontrollere kıyasla VEMP testi bozuklukları tespit edildi. VEMP testi bozukluklarının bir kısmı implant gereksinimine neden olan ilk tanı ile ilişkili, bir kısmı da cerrahiye bağlı vestibül hasarına ikincil olabilir. Özellikle iki taraflı koklear implantasyon planlanan hastalarda cerrahiye hazırlık aşamasında ameliyat öncesi vestibüler testler de yapılmalıdır. ABSTRACTObjectives: This study aims to evaluate the long-term functions of vestibular system via vestibular evoked myogenic potentials (VEMPs) in patients who were administered cochlear implant surgery. Patients and Methods:Our study included 35 patients aged under 18 years (19 males, 16 females; mean age 13.0±3.6 years; range 5 to 18 years) who were followed-up for at least one year after cochlear implant surgery. Control group included 35 voluntary individuals aged under 18 years (21 males, 14 females; mean age 14.6±3.2 years; range 5 to 18 years), who had no history of any complaint related to the vestibular system. Cervical and ocular VEMP responses acquired in both ears of study and control groups were compared between the groups. Results:Rates of cervical VEMP wave acquisition in children with cochlear implants did not show any significant difference between the operated and opposite side ears (p=0.802). In children with cochlear implants, there was also no significant difference between the operated and opposite side ears in terms of rates of ocular VEMP wave acquisition (p=0.078). In the ears of children in the control group, cervical VEMP and ocular VEMP waves were acquired at significantly higher rates compared to those in both operated and opposite side ears of children with implants (p<0.001). Conclusion:In th...

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Quality Control after Cochlear Implant Surgery by Means of Rotational Tomography

Abstract: The impact of these findings may influence further developments of electrode arrays as well as surgical techniques for implantation.

Cited by 147 publications

References 8 publications

Conebeam CT of the Head and Neck, Part 2: Clinical Applications

Conebeam CT of the Head and Neck, Part 2: Clinical Applications

Cochlear Implants: System Design, Integration, and Evaluation

Long-term vestibular evoked myogenic potential responses in children with cochlear implant

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