PANCE PEARLS-Hearing, Vestibular, Middle Ear COPY Flashcards
Sensorineural Hearing Loss: Weber and Rinne Test
sensori_N_EURAL lateralizes to _N_ORMAL ear and _N_ORMAL Rinne
- Weber: Lateralizes to NORMAL ear. Thus, if lateralizes right, SNHL on left.
- Rinne: AC> BC (though patient will still have difficulty hearing own voice and deciphering words)
__________
Etiologies
- INNER EAR
- Most common: Presbyacusis
- Chronic loud noise exposure
- CNS lesions (ex. acoustic neuroma)
- Labyrinthitis
- Meniere syndrome
Sensorineural Hearing Loss: Etiologies
__________
Etiologies
- INNER EAR
- Most common: Presbyacusis
- Chronic loud noise exposure
- CNS lesions (ex. acoustic neuroma)
- Labyrinthitis
- Meniere syndrome
_______
sensori_N_EURAL lateralizes to _N_ORMAL ear and _N_ORMAL Rinne
- Weber: Lateralizes to NORMAL ear. Thus, if lateralizes right, SNHL on left.
- Rinne: AC> BC (though patient will still have difficulty hearing own voice and deciphering words)
Meniere’s Disease (Idiopathic Endolymphatic Hydrops):
Pathophysiology
Pathophysiology
- Idiopathic distention of endolymphatic compartment of inner ear by excess fluid
- This results in increased pressure within the inner ear
Clinical Manifestations
- Episodic peripheral vertigo lasting minutes to hours
- Horizontal nystagmus (sign of peripheral vertigo)
- Tinnitus
- Ear fullness
- fluctuating hearing loss (primarily low tone hearing loss)
- Nausea
- Vomiting
Diagnosis
- Transtympanic electrocochleography most accurate (during active episode)
- Loss of nystagmus with caloric testing
- Audiometry (loss of low tones)
Management
Symptomatic
- antiemetics
- antihistamines (Meclizine, Prochlorperazine)
- Benzodiazepines (diazepam)
- Anticholinergics (Scopolamine)
- Decompression if refractory to meds or severe (ex. Typanostomy tube or Labyrinthectomy)
Preventative
- Diuretics (hydrochlorothiazide): reduce endolymphatic pressure
- Avoid: salt, caffeine, chocolate, ETOH (these increase endolymphatic pressure)
Meniere’s Disease (Idiopathic Endolymphatic Hydrops):
Clinical Manifestations (7)
Clinical Manifestations
- Episodic peripheral vertigo lasting minutes to hours
- Horizontal nystagmus (sign of peripheral vertigo)
- Tinnitus
- Ear fullness
- fluctuating hearing loss (primarily low tone hearing loss)
- Nausea
- Vomiting
Diagnosis
- Transtympanic electrocochleography most accurate (during active episode)
- Loss of nystagmus with caloric testing
- Audiometry (loss of low tones)
Management
Symptomatic
- antiemetics
- antihistamines (Meclizine, Prochlorperazine)
- Benzodiazepines (diazepam)
- Anticholinergics (Scopolamine)
- Decompression if refractory to meds or severe (ex. Typanostomy tube or Labyrinthectomy)
Preventative
- Diuretics (hydrochlorothiazide): reduce endolymphatic pressure
- Avoid: salt, caffeine, chocolate, ETOH (these increase endolymphatic pressure)
Pathophysiology
- Idiopathic distention of endolymphatic compartment of inner ear by excess fluid
- This results in increased pressure within the inner ear
Meniere’s Disease (Idiopathic Endolymphatic Hydrops):
Diagnosis
Diagnosis
- Transtympanic electrocochleography most accurate (during active episode)
- Loss of nystagmus with caloric testing
- Audiometry (loss of low tones)
Management
Symptomatic
- antiemetics
- antihistamines (Meclizine, Prochlorperazine)
- Benzodiazepines (diazepam)
- Anticholinergics (Scopolamine)
- Decompression if refractory to meds or severe (ex. Typanostomy tube or Labyrinthectomy)
Preventative
- Diuretics (hydrochlorothiazide): reduce endolymphatic pressure
- Avoid: salt, caffeine, chocolate, ETOH (these increase endolymphatic pressure)
Pathophysiology
- Idiopathic distention of endolymphatic compartment of inner ear by excess fluid
- This results in increased pressure within the inner ear
Clinical Manifestations
- Episodic peripheral vertigo lasting minutes to hours
- Horizontal nystagmus (sign of peripheral vertigo)
- Tinnitus
- Ear fullness
- fluctuating hearing loss (primarily low tone hearing loss)
- Nausea
- Vomiting
Meniere’s Disease (Idiopathic Endolymphatic Hydrops):
Management (Symptomatic and Preventative)
Management
Symptomatic
- antiemetics
- antihistamines (Meclizine, Prochlorperazine)
- Benzodiazepines (diazepam)
- Anticholinergics (Scopolamine)
- Decompression if refractory to meds or severe (ex. Typanostomy tube or Labyrinthectomy)
Preventative
- Diuretics (hydrochlorothiazide): reduce endolymphatic pressure
- Avoid: salt, caffeine, chocolate, ETOH (these increase endolymphatic pressure)
Pathophysiology
- Idiopathic distention of endolymphatic compartment of inner ear by excess fluid
- This results in increased pressure within the inner ear
Clinical Manifestations
- Episodic peripheral vertigo lasting minutes to hours
- Horizontal nystagmus (sign of peripheral vertigo)
- Tinnitus
- Ear fullness
- fluctuating hearing loss (primarily low tone hearing loss)
- Nausea
- Vomiting
Diagnosis
- Transtympanic electrocochleography most accurate (during active episode)
- Loss of nystagmus with caloric testing
- Audiometry (loss of low tones)
Acoustic (Vestibular) CN VIII Neuroma/Vestibular Schwannoma:
Pathophysiology
Pathophysiology
Cranial nerve VIII/8 Schwannoma-benign tumor of Schwann cells, which produce myelin sheath
Clinical Manifestation
**Unilateral SNHL is an acoustic neuroma until proven otherwise**
- Unilateral SNHL
- Tinnitus
- Headache
- Facial Numbness
- Continuous disequilibrium/vertigo (unsteadiness while walking)
Diagnosis
- CT scan. Usually unilateral.
- If bilateraly, suspect neurofribromatosis type II
Management
- Surgery
- Focused radiation therapy
Acoustic (Vestibular) CN VIII Neuroma/Vestibular Schwannoma:
Clinical manifestation
Clinical Manifestation
**Unilateral SNHL is an acoustic neuroma until proven otherwise**
- Unilateral SNHL
- Tinnitus
- Headache
- Facial Numbness
- Continuous disequilibrium/vertigo (unsteadiness while walking)
Diagnosis
- CT scan. Usually unilateral.
- If bilateraly, suspect neurofribromatosis type II
Management
- Surgery
- Focused radiation therapy
Pathophysiology
Cranial nerve VIII/8 Schwannoma-benign tumor of Schwann cells, which produce myelin sheath
Acoustic (Vestibular) CN VIII Neuroma/Vestibular Schwannoma:
Diagnosis
Diagnosis
- CT scan. Usually unilateral.
- If bilateraly, suspect neurofribromatosis type II
Management
- Surgery
- Focused radiation therapy
Pathophysiology
Cranial nerve VIII/8 Schwannoma-benign tumor of Schwann cells, which produce myelin sheath
Clinical Manifestation
**Unilateral SNHL is an acoustic neuroma until proven otherwise**
- Unilateral SNHL
- Tinnitus
- Headache
- Facial Numbness
- Continuous disequilibrium/vertigo (unsteadiness while walking)
Acoustic (Vestibular) CN VIII Neuroma/Vestibular Schwannoma:
Management
Management
- Surgery
- Focused radiation therapy
Pathophysiology
Cranial nerve VIII/8 Schwannoma-benign tumor of Schwann cells, which produce myelin sheath
Clinical Manifestation
**Unilateral SNHL is an acoustic neuroma until proven otherwise**
- Unilateral SNHL
- Tinnitus
- Headache
- Facial Numbness
- Continuous disequilibrium/vertigo (unsteadiness while walking)
Diagnosis
- CT scan. Usually unilateral.
- If bilateraly, suspect neurofribromatosis type II
**Unilateral SNHL is an __________ until proven otherwise**
Acoustic (Vestibular) CN VIII Neuroma/Vestibular Schwannoma
Pathophysiology
Cranial nerve VIII/8 Schwannoma-benign tumor of Schwann cells, which produce myelin sheath
Clinical Manifestation
**Unilateral SNHL is an acoustic neuroma until proven otherwise**
- Unilateral SNHL
- Tinnitus
- Headache
- Facial Numbness
- Continuous disequilibrium/vertigo (unsteadiness while walking)
Diagnosis
- CT scan. Usually unilateral.
- If bilateraly, suspect neurofribromatosis type II
Management
- Surgery
- Focused radiation therapy
Barotrauma:
Pathophysiology
Pathophysiology
- Rapid pressure change leads to the inability of the Eustachian Tube to equalize pressure
- Symptoms similar to Eustachian Tube Dysfunction
- Ex: taking a flight on an airplane, scuba diver, or patients on mechanical ventilation
Clinical Manifestations
- Auricular pain and fullness
- Hearing loss that persists after the etiologic event
- May have bloody discharge if traumatic
- Tympanic Membrane: +/- rupture or petechiae
Management
- Autoinsufflation (swallowing, yawning)
- Decongestants or antihistamines (reduce eustachian tube edema)
Barotrauma:
Clinical Manifestations (4)
Clinical Manifestations
- Auricular pain and fullness
- Hearing loss that persists after the etiologic event
- May have bloody discharge if traumatic
- Tympanic Membrane: +/- rupture or petechiae
Management
- Autoinsufflation (swallowing, yawning)
- Decongestants or antihistamines (reduce eustachian tube edema)
Pathophysiology
- Rapid pressure change leads to the inability of the Eustachian Tube to equalize pressure
- Symptoms similar to Eustachian Tube Dysfunction
- Ex: taking a flight on an airplane, scuba diver, or patients on mechanical ventilation
Barotrauma:
Management
Management
- Autoinsufflation (swallowing, yawning)
- Decongestants or antihistamines (reduce eustachian tube edema)
Pathophysiology
- Rapid pressure change leads to the inability of the Eustachian Tube to equalize pressure
- Symptoms similar to Eustachian Tube Dysfunction
- Ex: taking a flight on an airplane, scuba diver, or patients on mechanical ventilation
Clinical Manifestations
- Auricular pain and fullness
- Hearing loss that persists after the etiologic event
- May have bloody discharge if traumatic
- Tympanic Membrane: +/- rupture or petechiae
Patient is experiencing a “false sense of motion” or “exaggerated sense of motion”. What is the terminology for this?
Vertigo
Vertigo
Location of problem: Peripheral vertigo
Peripheral Vertigo
Location of problem
- Labyrinth or vestibular nerve (which is part of CNVIII/8)
Etiologies
- Benign Positional Vertigo (BPV) (most common)
- Meniere
- Vestibular Neuritis
- Labyrinthitis
- Cholesteatoma
Clinical
- HORIZONTAL nystagmus (usually beats away from affected side)
- Fatigable
- Sudden onset of tinnitus and hearing loss usually associated with peripheral compared to central causes
Vertigo
Etiologies: Peripheral vertigo
Peripheral Vertigo
Etiologies
- Benign Positional Vertigo (BPV) (most common)
- Meniere
- Vestibular Neuritis
- Labyrinthitis
- Cholesteatoma
Clinical
- HORIZONTAL nystagmus (usually beats away from affected side)
- Fatigable
- Sudden onset of tinnitus and hearing loss usually associated with peripheral compared to central causes
Location of problem
- Labyrinth or vestibular nerve (which is part of CNVIII/8)
Vertigo
Clinical Presentation: Peripheral vertigo
Peripheral Vertigo
Clinical
- HORIZONTAL nystagmus (usually beats away from affected side)
- Fatigable
- Sudden onset of tinnitus and hearing loss usually associated with peripheral compared to central causes
Location of problem
- Labyrinth or vestibular nerve (which is part of CNVIII/8)
Etiologies
- Benign Positional Vertigo (BPV) (most common)
- Meniere
- Vestibular Neuritis
- Labyrinthitis
- Cholesteatoma
Vertigo
- Episodic vertigo
- No hearing loss
Peripheral Vertigo
- Benign Positional Vertigo (BPV) (most common)
Vertigo
- Episodic vertigo
- Positive for hearing loss
Peripheral Vertigo
- Meniere
Vertigo
- Continuous vertigo
- Positive for hearing loss
Peripheral Vertigo
- Labyrinthitis
Vertigo
- Continuous vertigo
- No hearing loss
Peripheral Vertigo
- Vestibular Neuritis
Vertigo
Pathophysiology of nausea and vomiting
Nausea and vomiting are caused by sensory conflict mediated by the neurotransmitters GABA, acetylcholine, histamine, dopamine, and serotonin. Antiemetics work primarily by these transmitters
Vertigo
Identify which type of vertigo:
- HORIZONTAL nystagmus
- Fatigable
Peripheral Vertigo
Vertigo
Identify which type of vertigo:
- VERTICAL nystagmus
- NONFatigable (continuous)
Central Vertigo
Vertigo
Central Vertigo: Location of problem
Central Vertigo
Location of problem
Brainstem or cerebellar
Etiologies
- Cerebellopontine tumors
- Migraine
- Cerebral vascular disease
- Multiple sclerosis
- Vestibular neuroma
Clinical
- VERTICAL nystagmus
- NONfatigable (continuous)
- Gait problems more severe
- Gradual onset
- Positive CNS signs
Vertigo
Central Vertigo: possible etiologies (5)
Central Vertigo
Etiologies
- Cerebellopontine tumors
- Migraine
- Cerebral vascular disease
- Multiple sclerosis
- Vestibular neuroma
Clinical
- VERTICAL nystagmus
- NONfatigable (continuous)
- Gait problems more severe
- Gradual onset
- Positive CNS signs
Location of problem
Brainstem or cerebellar
Vertigo
Central Vertigo: clinical manifestations (5)
Central Vertigo
Clinical
- VERTICAL nystagmus
- NONfatigable (continuous)
- Gait problems more severe
- Gradual onset
- Positive CNS signs
Location of problem
Brainstem or cerebellar
Etiologies
- Cerebellopontine tumors
- Migraine
- Cerebral vascular disease
- Multiple sclerosis
- Vestibular neuroma
Vertigo: What is your first line for managing Nausea/Vomiting in patients with vertigo? Other treatments?
What is the most common cause of vertigo?
Benign Positional Vertigo (BPV)
Benign Paroxysmal Positional Vertigo (BPV or BPPV)
Pathophysiology
Pathophysiology
- Caused by displaced otoliths (calcium carbonate particles)
- Normally, otoliths are attached to the hair cells inside the saccule and utricule (attached to the 3 semicircular canals)
- Head movements cause displaced otolith movement, which leads to vertigo
Clinical manifestations
- Sudden, episodic peripheral vertigo (provoked with changes of head positioning)
- Vertigo usually lasts 10-60 seconds
- Positive Dix-Hallpike Test/Nylan Barany
- Patient placed in supine position with head 30 degrees lower than body
- Head quickly turned 90 degrees to one side
- Result: Delayed fatigable horizontal nystagmus
- IF NYSTAGMUS IS PERSISTANT OR NON-FATIGABLE, ASSESS FOR CENTRAL CAUSE OF VERTIGO INSTEAD.
Management
- Epley maneuver
- Canalith repositioning mainstay of treatment
- Usually resolves with time as the otoliths naturally dissolve and the vertigo episodic brief
- Medications usually not needed. But, if medicate:
- antihistamines,
- anticholinergics,
- benzodiazepines
Benign Paroxysmal Positional Vertigo (BPV or BPPV)
Clinical Manifestations
Clinical manifestations
- Sudden, episodic peripheral vertigo (provoked with changes of head positioning)
- Vertigo usually lasts 10-60 seconds
- Positive Dix-Hallpike Test/Nylan Barany
- Patient placed in supine position with head 30 degrees lower than body
- Head quickly turned 90 degrees to one side
- Result: Delayed fatigable horizontal nystagmus
- IF NYSTAGMUS IS PERSISTANT OR NON-FATIGABLE, ASSESS FOR CENTRAL CAUSE OF VERTIGO INSTEAD.
Management
- Epley maneuver
- Canalith repositioning mainstay of treatment
- Usually resolves with time as the otoliths naturally dissolve and the vertigo episodic brief
- Medications usually not needed. But, if medicate:
- antihistamines,
- anticholinergics,
- benzodiazepines
Pathophysiology
- Caused by displaced otoliths (calcium carbonate particles)
- Normally, otoliths are attached to the hair cells inside the saccule and utricule (attached to the 3 semicircular canals)
- Head movements cause displaced otolith movement, which leads to vertigo
Benign Paroxysmal Positional Vertigo (BPV or BPPV)
Management
Management
- Epley maneuver
- Canalith repositioning mainstay of treatment
- Usually resolves with time as the otoliths naturally dissolve and the vertigo episodic brief
- Medications usually not needed. But, if medicate:
- antihistamines,
- anticholinergics,
- benzodiazepines
Pathophysiology
- Caused by displaced otoliths (calcium carbonate particles)
- Normally, otoliths are attached to the hair cells inside the saccule and utricule (attached to the 3 semicircular canals)
- Head movements cause displaced otolith movement, which leads to vertigo
Clinical manifestations
- Sudden, episodic peripheral vertigo (provoked with changes of head positioning)
- Vertigo usually lasts 10-60 seconds
- Positive Dix-Hallpike Test/Nylan Barany
- Patient placed in supine position with head 30 degrees lower than body
- Head quickly turned 90 degrees to one side
- Result: Delayed fatigable horizontal nystagmus
- IF NYSTAGMUS IS PERSISTANT OR NON-FATIGABLE, ASSESS FOR CENTRAL CAUSE OF VERTIGO INSTEAD.