Fracture of temporal bone
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Transcript of Fracture of temporal bone
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Fracture of temporal boneFracture of temporal bone
Chunfu Dai M.D & Ph.DChunfu Dai M.D & Ph.DOtolaryngology Department Otolaryngology Department
Fudan UniversityFudan University
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Classifications Classifications 1.1. Longitudinal fracturesLongitudinal fractures2.2. Transverse fracturesTransverse fractures3.3. Mixed fracturesMixed fractures
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Longitudinal fracturesLongitudinal fractures 80% of Temporal Bo80% of Temporal Bone Fracturesne Fractures Lateral Forces along Lateral Forces along the petrosquamous sthe petrosquamous suture lineuture line 15-20% Facial Nerve 15-20% Facial Nerve involvementinvolvement EAC lacerationEAC laceration
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Transverse fracturesTransverse fractures 20% of Temporal 20% of Temporal Bone FracturesBone Fractures Forces in the AntForces in the Antero-Posterior direro-Posterior directionection Inner ear injuryInner ear injury 50% Facial Nerve 50% Facial Nerve InvolvementInvolvement EAC intactEAC intact
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Physical ExaminationPhysical Examination Tuning Fork examTuning Fork exam Pneumatic OtoscopyPneumatic Otoscopy
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Imaging Imaging HRCTHRCT MRIMRI Angiography/ MRAAngiography/ MRA
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symptomssymptoms Hearing Loss & tinnitHearing Loss & tinnitus us DizzinessDizziness CSF Otorrhea and RhCSF Otorrhea and Rhinorrheainorrhea Facial Nerve InjuriesFacial Nerve Injuries
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Hearing lossHearing loss Formal Audiometry vs. Tuning ForkFormal Audiometry vs. Tuning Fork 71% of patients with Temporal Bone Tra71% of patients with Temporal Bone Trauma have hearing lossuma have hearing loss TM PerforationsTM Perforations
CHL > 40db suspicion for ossicular discontinCHL > 40db suspicion for ossicular discontinuityuity
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Hearing lossHearing lossLongitudinal FracturesLongitudinal Fractures
Conductive or mixed hearConductive or mixed hearing lossing loss 80% of CHL resolve spont80% of CHL resolve spontaneouslyaneously
Transverse FracturesTransverse Fractures Sensorineural hearing losSensorineural hearing losss Less likely to improveLess likely to improve
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Dizziness Dizziness Otic capsule fracture, labyrinthine concuOtic capsule fracture, labyrinthine concussion, Perilymphatic Fistulassion, Perilymphatic Fistula Perilymphatic FistulasPerilymphatic Fistulas
Fluctuating dizziness and/or hearing lossFluctuating dizziness and/or hearing loss Tulio’s PhenomenonTulio’s Phenomenon ManagementManagement
40% spontaneously close40% spontaneously close Surgical managementSurgical management
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Dizziness Dizziness BPPVBPPV
Acute, latent, and fatiAcute, latent, and fatigable vertigogable vertigo Can occur any time fCan occur any time following injuryollowing injury Dix HallpikeDix Hallpike Epley ManeuverEpley Maneuver
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CSF Otorrhea and RhinorrheaCSF Otorrhea and Rhinorrhea Temporal bone Fractures are the most cTemporal bone Fractures are the most common cause of CSF Otorrheaommon cause of CSF Otorrhea Beta-2-transferrinBeta-2-transferrin HRCTHRCT
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CSF Otorrhea and RhinorrheaCSF Otorrhea and Rhinorrhea ManagementManagement
Conservative therapyConservative therapy Lie in bed with Head elevated 30-45°Lie in bed with Head elevated 30-45°
AntibioticsAntibiotics SurgerySurgery
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CSF Otorrhea and RhinorrheaCSF Otorrhea and RhinorrheaSurgical ManagementSurgical Management Surgical approachSurgical approach
Status of hearing Status of hearing Meningocele/encephaloceleMeningocele/encephalocele Fistula locationFistula location
TransmastoidTransmastoid Middle Cranial FossaMiddle Cranial Fossa
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Facial Nerve InjuriesFacial Nerve Injuries EvaluationEvaluation
Previous statusPrevious status TimeTime Onset and progressionOnset and progression Complete vs. IncompleteComplete vs. Incomplete
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House Brackman grading systemHouse Brackman grading systemII NormalNormal Normal facial functionNormal facial functionIIII MildMild Slight synkinesis/weaknessSlight synkinesis/weaknessIIIModerate Complete eye closure, noticeable syIIIModerate Complete eye closure, noticeable synkinesis, slight forehead movementnkinesis, slight forehead movementIVModerately SevereIVModerately Severe Incomplete eye closure, Incomplete eye closure, symmetry at rest, no forehead movementsymmetry at rest, no forehead movementVV SevereSevere Assymetry at rest, barely noticeablAssymetry at rest, barely noticeable motione motionVITotalVITotal No movementNo movement
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Electrophysiologic TestingElectrophysiologic Testing NETNET MSTMST ENoGENoG
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Nerve Excitability TestNerve Excitability TestMaximal Stimulation TestMaximal Stimulation Test
>3.5mA difference suggests a poor >3.5mA difference suggests a poor prognosis for return of facial functionprognosis for return of facial function
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ElectroneuronographyElectroneuronography Most accurate, qualitative measurementMost accurate, qualitative measurement Reduction of >90% amplitude correlates Reduction of >90% amplitude correlates with a poor prognosis for spontaneous rwith a poor prognosis for spontaneous recoveryecovery
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ElectromyographyElectromyography Limited use until 10-14 daysLimited use until 10-14 days Polyphasic potentials= GoodPolyphasic potentials= Good
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Facial Nerve InjuriesFacial Nerve Injuries Decision to treat is primarily based on wDecision to treat is primarily based on whether there is complete vs. incomplete hether there is complete vs. incomplete paralysisparalysis
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TreatmentTreatment Conservative treatment candidatesConservative treatment candidates Surgical candidatesSurgical candidates
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Conservative Treatment Conservative Treatment CandidatesCandidates
Chang and CassChang and Cass Normal Facial Function regardless of progreNormal Facial Function regardless of progressionssion Incomplete paralysis and no progression to Incomplete paralysis and no progression to complete paralysiscomplete paralysis Less than 95% degeneration by ENoGLess than 95% degeneration by ENoG
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Surgical CandidatesSurgical Candidates Critical Prognostic factorsCritical Prognostic factors
Immediate vs. DelayedImmediate vs. Delayed Complete vs. Incomplete paralysisComplete vs. Incomplete paralysis ENoG criteriaENoG criteria
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Algorithm for Facial Nerve Algorithm for Facial Nerve InjuryInjury
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Surgical ApproachSurgical Approach Suspect location of neural injurySuspect location of neural injury Presence or absence of hearingPresence or absence of hearing
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Surgical ApproachSurgical Approach Lateral to the geniculate ganglionLateral to the geniculate ganglion
transmastoidtransmastoid Medial to the Geniculate GanglionMedial to the Geniculate Ganglion
No useful hearingNo useful hearing Transmastoid-translabyrinthineTransmastoid-translabyrinthine
Intact hearingIntact hearing Transmastoid-trans-epitympanicTransmastoid-trans-epitympanic Middle Cranial FossaMiddle Cranial Fossa
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Surgical findingsSurgical findings Nerve repairNerve repair
Direct anastomosisDirect anastomosis Nerve graftNerve graft
DecompressionDecompression
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Case ReportCase Report 32 yr old fisherman was wading32 yr old fisherman was wading
Minding his own businessMinding his own business Hit in head by a flying fishHit in head by a flying fish Immediate profound vertigo, hearing losImmediate profound vertigo, hearing losss CT scan revealed longitudinal Temp bonCT scan revealed longitudinal Temp bone fracturee fracture
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