Temporal Bone Fractures: Diagnosis, Management and Complications
A temporal bone fracture is a break through the part of the skull that contains the external auditory canal, middle ear, inner ear, facial nerve canal and major blood vessels. It usually follows high-energy blunt head trauma such as a road-traffic collision, fall, assault or crush injury. The fracture may be only one component of a serious head or multiple-trauma presentation.
The danger is not the fracture line alone. Injury can cause intracranial haemorrhage, cerebrospinal fluid leakage, facial-nerve paralysis, conductive or sensorineural hearing loss, vertigo, ossicular disruption and meningitis. Initial care must therefore follow trauma priorities before detailed ear assessment.
Blood or clear fluid from the ear after head trauma is a possible skull-base fracture. Stabilise airway, breathing and circulation with cervical-spine protection, assess the Glasgow Coma Scale, avoid ear irrigation or blind instrumentation, and arrange urgent CT and specialist care.
Learning objectives
- Describe the important anatomy and common mechanisms of temporal bone fracture.
- Recognise otic capsule-sparing and otic capsule-violating injuries.
- Identify Battle sign, haemotympanum, CSF otorrhoea, hearing loss and facial weakness.
- Outline safe initial assessment, imaging and bedside hearing tests.
- Explain the management of CSF leak, facial palsy, hearing loss and vestibular symptoms.
- Recognise complications requiring urgent ENT, neurosurgical or trauma review.
Relevant anatomy
The temporal bone forms the lateral skull base. Review the external, middle and inner ear anatomy before studying the fracture patterns. A fracture can cross several closely related structures.
The external canal, tympanic membrane, ossicles and mastoid air cells may be injured, causing bleeding, haemotympanum, perforation and conductive hearing loss.
The cochlea, vestibule and semicircular canals form the bony labyrinth. Violation of this capsule strongly predicts sensorineural hearing loss, vertigo and CSF leakage.
The facial nerve travels through the fallopian canal. The petrous carotid canal, sigmoid sinus and jugular bulb are nearby and may be injured in severe trauma.
Mechanisms and classification
Common mechanisms
- Road-traffic collisions, including motorcycle and pedestrian injuries.
- Falls from height or a fall onto a hard surface.
- Assault with a blunt object.
- Sports, occupational or crush injury.
- Penetrating trauma, which is less common but may cause complex open injury.
Modern classification
| Fracture type | Definition | Expected complications |
|---|---|---|
| Otic capsule-sparing | The fracture does not cross the cochlea, vestibule or semicircular canals. It is the more common pattern. | Conductive hearing loss, haemotympanum, tympanic-membrane injury, ossicular disruption and facial-nerve injury may occur. |
| Otic capsule-violating | The fracture crosses the bony labyrinth. | Higher risk of profound sensorineural hearing loss, severe vertigo, CSF leak, facial-nerve injury and intracranial complications. |
The older description of longitudinal, transverse and mixed fractures can still be found in textbooks. However, classification according to whether the otic capsule is spared or violated better predicts the major functional complications.
Clinical presentation
History
- Mechanism, direction and estimated force of impact.
- Loss of consciousness, amnesia, seizure, vomiting or worsening headache.
- Bleeding or clear watery discharge from the ear or nose.
- Sudden hearing loss, tinnitus, a blocked-ear sensation or sound distortion.
- Vertigo, imbalance, nausea or oscillopsia.
- Facial weakness noticed immediately after injury or developing later.
- Anticoagulant use, bleeding disorder, alcohol or drug exposure and other injuries.
Important examination findings
- Battle sign: post-auricular bruising over the mastoid, which may appear hours after injury.
- Haemotympanum: blue-black or dark blood visible behind an intact tympanic membrane.
- Blood in the ear canal from canal laceration, tympanic-membrane perforation or middle-ear bleeding.
- Clear otorrhoea or rhinorrhoea suggesting a CSF leak.
- Conductive or sensorineural hearing loss.
- Nystagmus, vertigo, ataxia or severe imbalance.
- Upper- or lower-motor-pattern facial weakness depending on associated injury; traumatic intratemporal injury usually causes ipsilateral lower motor neuron facial palsy.
- Periorbital ecchymosis, scalp injury or other signs of basilar skull fracture.
Falling GCS, unequal pupils, new focal deficit, repeated vomiting, severe or worsening headache, seizure, shock, airway compromise, CSF leakage or expanding neck/ear bleeding demands immediate resuscitation and senior trauma or neurosurgical review.
Immediate assessment
Use a structured trauma approach. Detailed ear examination comes after life-threatening problems have been identified and treated.
- Airway with cervical-spine protection: use jaw thrust and appropriate airway support while maintaining spinal precautions.
- Breathing: assess oxygenation, chest movement and associated thoracic injury.
- Circulation: control external haemorrhage, obtain IV access and treat shock according to trauma protocol.
- Disability: record GCS, pupils, limb movement, blood glucose and seizure activity.
- Exposure: inspect for other injuries while preventing hypothermia.
Once stable, perform a focused ENT and neurological examination. Document facial movement before sedation or intubation whenever the situation permits. Inspect the pinna and canal gently with appropriate ENT instruments, but do not insert equipment deeply when fracture, canal injury or CSF leakage is suspected.
Bedside hearing assessment
In an alert, cooperative patient, whispered voice plus Weber and Rinne tests can help distinguish conductive from sensorineural loss. Review the physiology of hearing to interpret the findings. Formal pure-tone audiometry is required after stabilisation because bedside testing is easily affected by pain, confusion, blood and environmental noise.
Investigations and interpretation
| Investigation | Purpose | Interpretation and cautions |
|---|---|---|
| Non-contrast CT head | Detects intracranial haemorrhage, skull-base fracture, pneumocephalus and mass effect. | Signs of basal skull fracture require urgent CT under current head-injury guidance. A routine head CT may identify the injury but may not fully define fine temporal-bone anatomy. |
| High-resolution CT temporal bones | Defines the fracture path, otic-capsule involvement, ossicular injury, pneumolabyrinth and facial canal disruption. | Usually requested when complications are suspected or detailed ENT surgical planning is needed. |
| CT angiography | Assesses the internal carotid artery and other vessels. | Consider when the fracture crosses the carotid canal, there is severe unexplained bleeding, a focal neurological deficit or concern for vascular injury. |
| Audiometry and tympanometry | Quantifies conductive and sensorineural loss and middle-ear dysfunction. | Arrange when the patient is stable; persistent conductive loss may indicate ossicular disruption. |
| Facial-nerve electrodiagnostic testing | Assesses degeneration in complete facial paralysis. | Timing and interpretation require ENT expertise. Immediate complete palsy is more concerning for disruption than delayed palsy. |
| CSF-specific testing | Beta-2 transferrin or beta-trace protein can confirm that clear fluid is CSF. | Collect only when safe and available. A negative test does not replace clinical and imaging assessment if leakage is intermittent. |
| Laboratory tests | FBC, group and cross-match, coagulation profile, electrolytes and other tests according to trauma severity. | Results support resuscitation and surgery but do not diagnose the fracture. |
Use the general guide to ordering and interpreting ENT investigations alongside local trauma-imaging pathways.
Management
General and supportive care
- Admit or transfer according to neurological status, associated injuries and complications.
- Continue neurological observations, pupil assessment, vital signs and fluid balance.
- Give appropriate analgesia and antiemetic treatment while avoiding oversedation that obscures neurological change.
- Elevate the head of the bed when clinically appropriate and not contraindicated by spinal or haemodynamic concerns.
- Coordinate trauma, ENT, neurosurgical, radiology and audiology care.
Ear canal and tympanic-membrane care
- Do not irrigate or syringe the ear.
- Do not probe the canal or attempt blind removal of clot, bone or foreign material.
- Do not tightly pack a draining ear; use a loose sterile absorbent dressing externally if required.
- Keep the ear dry. Avoid unprescribed ear drops, oil and traditional preparations.
- Treat a tympanic-membrane perforation conservatively unless ENT identifies a specific indication for intervention.
CSF otorrhoea or rhinorrhoea
- Use skull-base precautions: avoid nose blowing, forceful coughing/straining where possible, nasal instrumentation and positive pressure through the nose unless required for life-saving airway care.
- Observe the volume and duration of leakage and monitor for meningitis.
- Many traumatic leaks close spontaneously; persistent or high-volume leakage may require lumbar drainage or surgical repair under specialist care.
- Routine prophylactic antibiotics are not automatically indicated for every closed fracture or CSF leak; follow neurosurgical/ENT and current local protocol.
Facial-nerve palsy
Record whether paralysis was immediate or delayed, partial or complete. Protect the cornea with lubrication, eyelid taping or other eye-care measures when closure is incomplete. Delayed palsy is often related to oedema and may recover with specialist-directed medical treatment. Immediate complete paralysis with an unfavourable electrical test and CT evidence of canal disruption may require surgical exploration or decompression.
Hearing loss
Conductive loss from haemotympanum often improves as blood resolves. Persistent conductive loss raises concern for ossicular-chain disruption and may later require ossiculoplasty. Sensorineural loss is more likely with otic-capsule violation; rehabilitation may include hearing aids or cochlear implantation after full audiological and ENT assessment.
Vertigo and balance disturbance
Short-term vestibular suppressants and antiemetics may be used for severe acute symptoms according to prescription, but prolonged suppressants can delay central compensation. Persistent symptoms need reassessment for benign positional vertigo, labyrinthine injury or perilymph fistula and may benefit from vestibular rehabilitation.
Complications
Intracranial haemorrhage, cerebral contusion, raised intracranial pressure, facial palsy and other cranial-nerve deficits.
Persistent conductive or sensorineural hearing loss, tinnitus, ossicular disruption, perilymph fistula, vertigo and chronic imbalance.
Persistent CSF fistula, recurrent meningitis, pneumocephalus and, less commonly, intracranial infection.
External canal stenosis, chronic tympanic-membrane perforation, cholesteatoma and delayed facial or auditory problems.
Review related complications in mastoid and skull-base disease. A patient may initially appear stable but develop delayed facial weakness, meningitis symptoms or persistent hearing loss, so follow-up matters.
Nursing care and patient education
- Perform and document scheduled GCS, pupil, limb, facial-movement and vital-sign observations.
- Observe ear or nasal drainage without occluding it; record amount, colour and associated symptoms.
- Maintain cervical-spine and fall precautions until cleared.
- Provide prescribed analgesia, antiemetics, eye protection and wound care.
- Keep the ear dry and reinforce avoidance of ear cleaning, syringing and nose blowing.
- Assist safe mobilisation; severe vertigo creates a high fall risk.
- Arrange ENT, audiology and neurological follow-up.
- Teach urgent return signs: fever, neck stiffness, worsening headache, repeated vomiting, drowsiness, seizure, new weakness, increasing clear drainage, facial weakness, worsening hearing or severe vertigo.
Clinical scenario
A 26-year-old motorcyclist is brought after a collision. He is drowsy with GCS 13, has blood in the right ear canal, a blue-black tympanic membrane, reduced hearing and bruising behind the ear. His face moves symmetrically and there is no obvious limb weakness.
Interpretation: haemotympanum and Battle sign indicate a possible basilar/temporal bone fracture. Protect the cervical spine, complete ABCDE assessment, obtain urgent non-contrast CT head, involve the trauma and ENT teams, avoid irrigation or packing of the ear, and repeat neurological and facial-nerve observations. Formal hearing assessment and high-resolution temporal-bone CT can follow according to findings and specialist advice.
Key examination points
- Temporal bone fracture is usually caused by high-energy head trauma.
- Battle sign, haemotympanum, ear bleeding and CSF otorrhoea are key signs.
- Otic capsule violation predicts severe sensorineural hearing loss and vestibular complications.
- Perform trauma resuscitation and cervical-spine protection before detailed otoscopy.
- CT is the primary imaging test; plain skull radiographs are inadequate for important head injury.
- Document facial movement and hearing early, then arrange formal audiometry.
- Never syringe or blindly instrument an ear when skull-base fracture is suspected.
- Management targets complications: CSF leak, facial palsy, hearing loss, vertigo and intracranial injury.
References and further reading
- NICE NG232: Head injury—assessment and early management.
- NICE NG39: Major trauma—assessment and initial management.
- MSD Manual Professional: Temporal bone fractures.
- MSD Manual Professional: Traumatic brain injury.
- MSD Manual Professional: Traumatic perforation of the tympanic membrane.
For education only. Follow current Uganda Clinical Guidelines, local trauma protocols and senior ENT/neurosurgical advice for individual patients.
