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Make a note only from reference for 10 mark
Here is a structured 10-mark note on Tinnitus based entirely on the reference material (Clinical-Competency Textbook of Shalakya Tantra, Ch. 42.9):
TINNITUS (Karna Nada)
Definition
Tinnitus is the perception of sound in the absence of an external auditory stimulus. It affects approximately 10-15% of adults, with 1-2% experiencing severe, debilitating forms. It may be unilateral or bilateral, continuous or intermittent, described as ringing, buzzing, hissing, roaring, or clicking. It is a symptom, not a disease itself.
1. Etiology / Classification
| Type | Subtypes | Causes |
|---|---|---|
| Objective | Pulsatile (A), Non-pulsatile (B) | Vascular (AVMs, atherosclerosis, venous hums, glomus tumor, carotid artery disease), Raised ICP, Highly vascular tumors |
| Subjective | Pulsatile (C), Non-pulsatile (D) | Hearing loss (NIHL, presbycusis, ototoxic drugs, Meniere's, SSNHL), Ear conditions (cerumen, otosclerosis, TMJ), Neurological (vestibular schwannoma, MS, head/neck trauma), Systemic (hypertension, thyroid, diabetes, anxiety) |
2. Pathophysiology
- Auditory Deafferentation: Cochlear hair cell damage (noise, aging) reduces auditory input to brain
- Central Compensation/Plasticity: Maladaptive reorganization of cochlear nucleus, inferior colliculus, and auditory cortex - neurons become hyperactive, firing spontaneously - perceived as tinnitus
- Limbic & Autonomic Involvement: Activation of limbic (emotion) and autonomic systems explains association with anxiety, depression, and sleep disturbance
- Somatosensory Interactions: Modulation by head/neck movements suggests auditory-somatosensory pathway interaction
3. Diagnosis
History
- Onset, duration, character (constant/intermittent)
- Unilateral vs. bilateral (unilateral pulsatile - rule out retrocochlear pathology)
- Modulating factors (head/neck movements, jaw clenching)
- Associated symptoms: hearing loss, vertigo, otalgia, facial numbness
- Impact on quality of life: sleep, concentration, mood
Physical Examination
- Otoscopy: Rule out cerumen, foreign body, otitis media, tympanic membrane pathology
- Head & Neck Exam: Palpate TMJ; auscultate for bruits (carotid, mastoid, orbit)
- Cranial Nerve Exam: CN V, VII, VIII
Audiological Assessment
- Pure-Tone Audiometry - assess hearing thresholds
- Tympanometry - middle ear function
- Tinnitus Pitch & Loudness Matching
- OAEs - outer hair cell function
- ABR - auditory nerve integrity (if retrocochlear lesion suspected)
Imaging
- MRI with Gadolinium: Unilateral/pulsatile tinnitus (without clear vascular cause), neurological symptoms - to rule out vestibular schwannoma, vascular lesions
- CTA/MRA: Pulsatile tinnitus - to evaluate vascular abnormalities
4. Management
A. Treat Underlying Cause
- Remove cerumen, review/stop ototoxic medications
- Surgical/interventional for AVMs, glomus tumors
- Dental splints for TMJ disorders
- Control hypertension, diabetes, thyroid dysfunction
B. Counseling & Education
- Reassure: tinnitus is rarely a sign of serious disease
- Explain neural basis; provide coping strategies
C. Sound Therapy
- Masking: White noise generators, environmental sounds
- Tinnitus Retraining Therapy (TRT): Directive counseling + broadband noise generators - promotes habituation, reclassifies signal as neutral
- Hearing Aids: For associated hearing loss - amplify external sound, reduce tinnitus noticeability
D. Pharmacological Treatment
- No drug specifically approved for tinnitus
- Antidepressants (TCAs, SSRIs): For co-morbid depression/anxiety
- Anxiolytics (Benzodiazepines): Short-term only; risk of dependence
- Off-label: Gabapentin, clonazepam - inconsistent results
E. Psychological Therapies
- CBT (Cognitive Behavioral Therapy): Most effective - reduces distress and negative thought patterns even if sound persists
- MBSR (Mindfulness-Based Stress Reduction): Non-judgmental awareness; reduces associated stress
F. Lifestyle Modifications
- Stress reduction: Meditation, yoga, exercise
- Sleep hygiene: Improve sleep quality
- Avoid triggers: Loud noise, excess caffeine, alcohol, nicotine
- Hearing protection: Prevent further noise-induced damage
Source: Clinical-Competency Textbook of Shalakya Tantra - Siro-Karna-Nasa-Mukha Roga, Ch. 42.9, pp. 180-182
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