Relationship between site of facial nerve injury and electroneuronography : a retrospective study

• Main Author: Rajoo, Tamil Selvi
• Format: Thesis
• Language: English
• Published: 2023
• Subjects: R Medicine; RA Public aspects of medicine
• Online Access: http://eprints.usm.my/62852/

Objective: To evaluate the clinical outcome of patients with temporal bone fracture (TBF) and traumatic facial nerve injury. The aim was to determine the association between site of facial nerve injury and electroneuronography(ENOG). Study design: This a retrospective study (observational) which done between 1st January 2010 to 31st January 2020. Setting: Tertiary university hospital Patients : 82 patients who had TBF and traumatic facial nerve injury who treated in our hospital. The data on demography of patients, clinical findings, Pure Tone Audiometry, House Brackmann (HB), ENOG and High Resolution Computer Tomography (HRCT) Temporal result were collected and analysed. Results: The mean age of who patients involved in trauma were 27.5 years old. Motor Vehicle Accidents (MVA) constituted 92.7% of cause of trauma. Mostly involving unhelmet motorcyclist (83.3%). Delayed facial paralysis was found in 87.8% cases. The HB grade IV was recorded highest (50%). The conductive hearing loss was most observed. The Longitudinal TBF had highest prevalence (60.5%). Based on new classification of TBF, majority were otic capsule sparing (84.4%). The tympanic segment (28%) commonly injured followed by first genu (24.4%). There was no significant difference between the percentage denervation (ENOG) and the facial canal sites fracture (p value<0.075). Conclusion: There is no association between sites of facial nerve injury and ENOG. The selection of patients for surgery should not solely rely on HRCT but also clinical grading (time of onset) and serial ENOG monitoring.