Ménière's Disease

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Ménière's Basics - Dizzying Definitions

  • Disorder of the inner ear; linked to endolymphatic hydrops (excess fluid).
  • Classic Triad:
    • Episodic vertigo: spinning, lasts 20 mins to 12 hrs.
    • Sensorineural Hearing Loss (SNHL): fluctuating, often low-frequency.
    • Tinnitus (ringing) &/or aural fullness.
    • 📌 Mnemonic: "Can't Hear, Can't Stand, Ringing Sound".
  • Epidemiology:
    • Onset typically 30-60 years.
    • Slight female predilection.

⭐ The classic triad of Ménière's disease is episodic vertigo, sensorineural hearing loss (typically low-frequency and fluctuating), and tinnitus or aural fullness.

Pathophysiology - Pressure Problems

  • Core pathology: Endolymphatic hydrops - significant distension of the membranous labyrinth due to an ↑ in endolymph volume.
  • Primary mechanism: Believed to be impaired resorption of endolymph, primarily within the endolymphatic sac and duct.
  • Etiological theories:
    • Idiopathic (most common)
    • Viral (e.g., HSV)
    • Autoimmune
    • Genetic factors
    • Vascular insufficiency
    • Trauma

⭐ The fundamental pathophysiological basis of Ménière's disease is endolymphatic hydrops.

Endolymphatic hydrops in the inner ear

Clinical Picture & Dx - Cracking the Case

  • Key Symptoms (Classic Tetrad):

    • Episodic vertigo: Rotatory, lasts 20 mins - 12 hrs.
    • Sensorineural Hearing Loss (SNHL): Fluctuating, progressive; initially ↓low-frequency.
    • Tinnitus: Typically low-pitched, roaring or hissing.
    • Aural fullness/pressure in the affected ear.
  • Associated Features: Nausea, vomiting common during vertigo. Tumarkin's otolithic crisis (sudden drop attacks without loss of consciousness) is rare but characteristic.

  • Diagnostic Criteria (AAO-HNS 2015 - Simplified):

    • Definite Ménière's Disease:
      • Two or more spontaneous episodes of vertigo, each lasting 20 minutes to 12 hours.
      • Audiometrically documented low- to mid-frequency SNHL in the affected ear on at least one occasion before, during, or after one of the vertigo episodes.
      • Fluctuating aural symptoms (hearing, tinnitus, or fullness) in the affected ear.
    • Probable Ménière's Disease:
      • Two or more episodes of vertigo or dizziness, each lasting 20 minutes to 24 hours.
      • Fluctuating aural symptoms (hearing, tinnitus, or fullness) in the affected ear.
      • (Other causes excluded by investigation).
  • Investigations:

    • Audiometry: Confirms SNHL (typically ↓low-frequency in early stages), may show recruitment, diplacusis.

      ⭐ Audiometry in early Ménière's disease typically reveals a fluctuating, low-frequency sensorineural hearing loss.

    • Electrocochleography (ECochG): May show an ↑Summating Potential (SP) / Action Potential (AP) ratio (e.g., >0.4); supports diagnosis of endolymphatic hydrops.
    • Vestibular Evoked Myogenic Potentials (VEMP): Can assess saccular and utricular function; may be abnormal.
    • MRI Brain (with gadolinium): Essential to rule out retrocochlear pathology (e.g., vestibular schwannoma, MS).
  • Diagnostic Flow (Definite MD):

Management Maze - Treatment Tactics

Goals: Reduce vertigo frequency/severity, preserve hearing, alleviate tinnitus/fullness.

  • Acute Attack Management:
    • Vestibular suppressants: Diazepam, Dimenhydrinate
    • Antiemetics: Promethazine, Prochlorperazine
  • Chronic/Prophylactic Management:
    • Lifestyle: Low salt diet (<2-3 g/day), avoid caffeine/alcohol/nicotine, stress reduction.

      ⭐ A low-salt diet (e.g., <2-3 grams/day) is a cornerstone of conservative management for Ménière's disease.

    • Medical: Diuretics (HCTZ + triamterene), Betahistine (16-48 mg TID).
  • Intratympanic Therapy (For refractory cases):
    • Steroids (e.g., Dexamethasone)
    • Gentamicin (chemical labyrinthectomy - for severe, intractable vertigo in unilateral disease).
  • Surgical Options (Last resort for refractory cases):
    • Endolymphatic sac decompression/shunt
    • Vestibular neurectomy
    • Labyrinthectomy (sacrifices hearing).

High‑Yield Points - ⚡ Biggest Takeaways

  • Classic triad: Episodic vertigo, fluctuating low-frequency SNHL, and tinnitus; often with aural fullness.
  • Pathophysiology: Endolymphatic hydrops (distension of membranous labyrinth).
  • Electrocochleography (ECoG) is diagnostic: ↑ SP/AP ratio (> 0.4).
  • Acute management: Vestibular sedatives (e.g., prochlorperazine, diazepam), antiemetics.
  • Chronic management: Salt restriction, diuretics (acetazolamide, HCTZ), betahistine.
  • Refractory cases: Intratympanic gentamicin, endolymphatic sac surgery, or labyrinthectomy.
  • Tumarkin's otolithic crisis (sudden drop attacks without loss of consciousness) is a severe manifestation.

Practice Questions: Ménière's Disease

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Triad of Meniere’s disease includes all except?

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Flashcards: Ménière's Disease

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What kind of drugs are the mainstay of treatment for acute meniere's disease?_____

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What kind of drugs are the mainstay of treatment for acute meniere's disease?_____

Vestibular sedatives

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