the organ of hearing...eczema, psoriasis, allergy & trauma clinical appearance of o.e....
TRANSCRIPT
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The Organ of Hearing
(Organon Auditus; The Ear)
Dr. Anvari
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The external ear
� auricula or pinna
� external acoustic � external acoustic meatus.
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Nerves� Auriculares anterior
& superior & the intrinsic muscles on the lateral surface are supplied by the temporal branch of the facial nerve
� the Auricularis posterior and the intrinsic muscles on the cranial surface by the posterior auricular branch of the same nerve.
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Arteriesof the auricula
� posterior auricularfrom the external carotid
� anterior auricular� anterior auricularfrom the superficial temporal.
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Ear (Microtia)
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External Acoustic Meatus(external auditory canal or meatus)
� S-shaped curve = 2.4 cm
� cartilaginous portion = 8 mm
� osseous portion = 16 mm
• tympanic sulcus
� pars externa
� inward, forward, and slightly upward
� pars media
� inward and backward
� pars interna
� inward, forward, and slightly downward
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Ear Wax is Your Friend!
• Waxy sebaceous secretions + skin cells• Anti-pseudomonal due to acidic PH• Moisture repelling waxy consistency• Occasionally needs removal if:• Occasionally needs removal if:
– Impairs hearing– Interferes with hearing aids– Impairs inspection– Cerumen “dam” causes water trapping
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Low Tech Wax Removal
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Arteries and nerves
� posterior auricular
� Deep auricular (maxillary)
� superficial temporal.
� auriculotemporal (V3)
�
� auricularbranch of the � superficial temporal. � auricularbranch of the vagus.
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Anatomy of the Ear
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Parts of the ear
� External (auricle and external external auditory canal)
� Channel sound in
� Makes ear wax
� Self cleaning
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Proper Technique?
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Ant in external auditory meatus
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Exostosis
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Otitis Externa (O.E.)
� more common in swimmers/divers
� most commonly bacterial
� 90% pain (otalgia), 10% itch� 90% pain (otalgia), 10% itch
� pain with manipulation
� lymph node enlargement
� foul greenish-tinged discharge
� eczema, psoriasis, allergy & trauma
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Clinical Appearance of O.E.
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Suppurative O. E.
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Suppurative O. E.
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� ��ش ه��� ��� ه���م ازدواج ���رت آ� �� � ��� ه���.���رت آ� �� � ��� ه���.
ب ا"!%$ #"!� ( �'((