Radiological Classification of the Facial Nerve

Related Clinical Trial
Anatomy-Based Fitting in Unexperienced Cochlear Implant Users Effect of Modulated Auditory Stimulation on Interaural Auditory Perception Effect of Donepezil on Speech Recognition in Cochlear Implant Users Analysis of Risk Factors of Neurodevelopmental Disorder in Deaf Infants Under Ten Months of Age. Natural History in Children up to 10 Years With Moderate to Profound Hearing Loss Due to Mutations in GJB2/OTOF Genes Evaluation of Electrode-modiolus Distance and Cochlear Fibrosis Using Depth Sounding and Spectroscopy Tools Audiological and Quality of Life Outcomes of Anatomy Based Fitting in Patients Implanted by Robot Assisted Cochlear Implant Surgery (RACIS) Pupillometry Techniques Usage to Quantify the Programming Parameters Effect in the Auditory Effort in Zti Opticon Cochlear Implant Adult Users Factors Affecting Early Progress of Cochlear Implant Outcomes in Adults Study of Sound and Speech Perception in New Cochlear Implanted Subjects Using or Not an Anatomy-based Fitting Post Approval Study to Assure the ContInued saFety and effectIveness of Neuro Cochlear Implant System in Adult Users Quantification of Visually Evoked Cortical Potentials in Individuals With Hearing Loss A Trial of LY3056480 in Patients With SNLH Fundamental Asynchronous Stimulus Timing Sound Coding Study Phase I Clinical Study of HY01 in Patients Genotype-phenotype Correlation of SLC26A4 in CI Patients With EVA Study of Music and Speech Perception in New Cochlear Implanted Subjects Using or Not a Tonotopy Based Fitting Oral Statins and Protection From Hearing Loss Study of a Minimally Invasive Cochlear Access for Cochlear Implantation Via a Robotic Procedure Cochlear Implant With Dexamethasone Eluting Electrode Array Hearing Implant Performance in Adults With Low-Frequency Residual Hearing Perimodiolar Implant Performance in Adults With Low-Frequency Residual Hearing Cochlear Implanted Listening Effort and Hearing Attention The Performance of a Robot-assisted Minimally Invasive Direct Cochlear Access for Cochlear Implantation Auditory Performances With Different Stimulation Depths in Cochlear Implanted Subjects Using a Fine Structure Strategy Feasibility of the Mi2000 Totally Implantable Cochlear Implant in Severely to Profoundly Deaf Adults. Hearing Aid Noise Reduction in Pediatric Users Pilot Study (Oticon Pilot Study) Phase I/IIa Study Evaluating Safety and Efficacy of an Intratympanic Dose of PIPE-505 in Subjects With Hearing Loss Dexamethasone-Eluting Cochlear Implant Electrode Artificial Intelligence in Diagnosis of DFNA9 Randomized Controlled Trial of Valganciclovir for Cytomegalovirus Infected Hearing Impaired Infants Study to Determine the Safety, Tolerability, and Pharmacokinetic Profile of HPN-07 and HPN-07 Plus NAC Cochlear Implant and Vestibular Function. Quality Control of CE-Certified Phonak Hearing Aids – 2018_42 Quality Control of CE-Certified Phonak Hearing Aids – 2018_28 Enlarged Vestibular Aqueduct Registry Evaluation of the High Frequency Digit Triplet Test in Cystic Fibrosis Effectiveness of P02 Digital Hearing Aids ABR Characteristics and Salivary Cortisone Concentration in Noise-exposed Workers Clinical Investigation of New CI Delivery Models in an Adult Nucleus CI Population Genetic Analysis of Hereditary Disorders of Hearing and Balance Compassionate Use Arm – ABI541 ABI for 10 NF2 Patients Evaluation of a Binaural Beamformer (StereoZoom) in a Virtual Acoustic Environment and in Real Life Evaluation of N6 Sound Processor in Group of Freedom Users Robotic Assisted Cochlear Implantation Feasibility Study Auditory Nerve Test System During Vestibular Schwannoma Resection Cochlear Electrical Impedance and the Effect of Topical Dexamethasone on Cochlear Implant Surgery Comparison Between Neuro 1 and Neuro 2 Cochlear Implant Speech Processors Listening Effort in Cochlear Implant Users Quality Control of CE-Certified Phonak Hearing Aids – 2019_19 Esteem Totally Implantable Hearing System A Clinical Trial of Anakinra for Steroid-Resistant Autoimmune Inner Ear Disease Study of Quality Perception on Music in New Cochlear Implanted Subjects Using or Not a Fine Structure Strategy An Evidence Based Delivery Model of Care for Newly Implanted Adult CI Recipients Study of Auditory Performance on Prosodic Tests in Cochlear Implanted Subjects Using a Fine Structure Strategy CI532 – Early Experience Study Clinical Applications of Round Window Imaging Anatomy in Cochlear Implant Surgery Single-sided Deafness and Cochlear Implants Cochlear Implantation Among Adults and Older Children With Unilateral or Asymmetric Hearing Loss Clinal Evaluation of Navigation Based Functional Ear Surgery Using Image Guided and Robotically Assisted Techniques OTO-413 in Subjects With Speech-in-Noise Hearing Impairment The Efficacy of a Minimally Invasive Direct Cochlear Access Via the HEARO Procedure Clinical Evaluation of a Cochlear Implant System Objective Measures in Cochlear Implant Evaluation of a Binaural Spatialization Method for Hearing Aids Esteem New Subject Enrollment Post Approval Study Safety of Autologous Stem Cell Infusion for Children With Acquired Hearing Loss Investigation of Anatomical Correlates of Speech Discrimination Efficacy of Digital Noise Reduction Strategies: A Hearing Aid Trial Evaluation of Revised Indicatons (ERID) for Cochlear Implant Candidacy for the Adult CMS Population Clinical and Genetic Analysis of Enlarged Vestibular Aqueducts Balance in Children With Cochlear Implants Congenital Cytomegalovirus: Efficacy of Antiviral Treatment Nucleus Freedom Cochlear Implant System Pediatric Post-approval Study Evaluation of the Nucleus Hybrid™ L24 Cochlear Implant System Radiological Classification of the Facial Nerve Congenital Cytomegalovirus: Efficacy of Antiviral Treatment in a Randomized Controlled Trial The Effect of Sound Stimulation on Hearing Ability The Effect of Sound Stimulation on Pure-tone Hearing Threshold Efficacy of SENS 401 in Subjects With Severe or Profound Sudden Sensorineural Hearing Loss The SeaSHeL National Prospective Cohort Study Non-linear Frequency Compared to Conventional Processing in Patients With and Without Cochlear Dead Regions. Study of Low Level Laser Therapy and Word Recognition in Hearing Impaired Individuals Electrode Placement and Audiologic Outcomes With the Advanced Bionics HiFocus L23 Electrode Video HIT in Sudden Sensorineural Hearing Loss Determine the Incidence of Long QT Amongst a Large Cohort of Subjects Diagnosed With Unilateral or Bilateral Sensorineural Hearing Loss. FX-322 in Sensorineural Hearing Loss Autologous Bone Marrow Harvest and Transplant for Sensorineural Hearing Loss FX-322 in Adults With Stable Sensorineural Hearing Loss

Brief Title

Radiological Classification of the Facial Nerve

Official Title

Radiological Classification of the Vertical Segment of Facial Nerve in Cochlear Implant Surgery

Brief Summary

      Cortical mastoidectomy and posterior tympanotomy is a classic approach for cochlear implant.
      Intimate knowledge of the relevant surgical anatomy of the temporal bone and facial recess is
      important to safely perform the posterior tympanotomy. Anatomical variation of facial nerve
      such as lateral or anterior position of vertical segment of facial nerve, will render this
      approach challenging. In this research, investigators proposed a Radiological Classification
      system of the position of vertical segment of facial nerve in relation to the lateral
      semicircular canal to predict difficult cases with narrow facial recess.

Detailed Description

      Cochlear implantation done by mastoidectomy, posterior tympanotomy and round window membrane
      insertion or cochleostomy, if we have to. In cases with very laterally placed vertical
      segment of the facial nerve a trans- mastoid trans- attic approach used with trans canal
      monitoring as an alternative approach. Position of the vertical segment of the facial nerve
      (VFN) determined by coronal view HRCT of temporal bone, bone window of 0.6 mm thickness by
      using the cut posterior to the internal auditory canal at the level of lateral semicircular
      canal (LSCC) and then drawing a line parallel to the bony canal of the VFN and another
      parallel line on the outer bony wall of lateral semicircular canal (LSCC), and comparing
      level of both. The location of the facial nerve classified into normal if the FN is medial,
      same level or lateral to LSCC . Investigators referred the laterally placed FN (LPFN) when
      the whole vertical segment of facial nerve is lateral to LSCC. In addition, distance between
      VFN and LSCC was measured in cases of laterally placed FN.

      Investigators proposed a radiological classification system of the mastoid segment of facial
      nerve to predict round window niche accessibility through posterior tympanotomy
      pre-operatively by using coronal view computed tomography scan of temporal bone. Facial nerve
      position classified into 3 types in relation to LSCC:

        1. TYPE I Medial to LSCC

        2. TYPE II Same level of LSCC

        3. TYPE III Laterally placed to LSCC III a) Less than 2mm III b) More than 2mm

Study Type


Primary Outcome

Radiological classification of vertical segment of facial nerve

Secondary Outcome

 Surgical approach in cochlear implantation


Severe to Profound Sensorineural Hearing Loss


cochlear implant surgery

Study Arms / Comparison Groups

 Cochlear Implant
Description:  Patients with severe to profound sensorineural hearing loss who underwent cochlear implant surgery


* Includes publications given by the data provider as well as publications identified by National Clinical Trials Identifier (NCT ID) in Medline.

Recruitment Information

Recruitment Status


Estimated Enrollment


Start Date

January 2010

Completion Date

October 2016

Primary Completion Date

September 2016

Eligibility Criteria

        Inclusion Criteria:

          -  All patient who underwent cochlear implant surgery with preoperative computed
             tomography scan and high resolution CT scan of temporal bone

        Exclusion Criteria:

          -  None




1 Year - 65 Years

Accepts Healthy Volunteers



Laila M Al Telmesani, MD, , 

Location Countries

Saudi Arabia

Location Countries

Saudi Arabia

Administrative Informations



Organization ID


Responsible Party


Study Sponsor

Imam Abdulrahman Bin Faisal University

Study Sponsor

Laila M Al Telmesani, MD, Principal Investigator, ENTDepartment, Dammam University, Dammam, Saudi Arabia

Verification Date

October 2016