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The cone of light, or light reflex, is a visible phenomenon which occurs upon examination of the tympanic membrane with an otoscope. [1] Shining light on the tympanic membrane causes a cone-shaped reflection of light to appear in the anterior inferior quadrant.
The pneumatic otoscope is the standard tool used in diagnosing otitis media (infection of the middle ear). [4] The pneumatic otoscope has a pneumatic (diagnostic) head, which contains a lens, an enclosed light source, and a nipple for attaching a rubber bulb and tubing.
Tympanic membrane retraction describes a condition in which a part of the eardrum lies deeper within the ear than its normal position.. The eardrum comprises two parts: the pars tensa, which is the main part of the eardrum, and the pars flaccida, which is a smaller part of the eardrum located above the pars tensa.
Otitis media is a group of inflammatory diseases of the middle ear. [2] One of the two main types is acute otitis media (AOM), [3] an infection of rapid onset that usually presents with ear pain. [1] In young children this may result in pulling at the ear, increased crying, and poor sleep. [1] Decreased eating and a fever may also be present. [1]
Normal ear drum. A perforated eardrum (tympanic membrane perforation) is a prick in the eardrum.It can be caused by infection (otitis media), trauma, overpressure (loud noise), inappropriate ear clearing, and changes in middle ear pressure.
Diagnosing bullous myringitis involves using an otoscope to spot distinctive white sack-like structures on the eardrum.Ear pain is the primary complaint. However, differentiating it from acute otitis media can be difficult, leading to early misdiagnosis.The rarity of bullous myringitis, especially compared to acute otitis media, can result in common misdiagnoses.
Long term otitis media (or 'glue ear') [2] Insertion of a tympanostomy tube. [4] [5] [6] If aspiration is performed as part of the insertion, the risk of tympanosclerosis occurring increases. [7] Risk also increases if a larger tube is used, [8] or if the procedure is repeated. [9] Atherosclerosis [10]
Otitis media, cholesteatoma [1] Types: Dilatory, baro-challenged induced, patulous [1] Causes: Common cold, influenza, allergic rhinitis, sinusitis [1] Differential diagnosis: Endolymphatic hydrops, temporomandibular joint dysfunction, superior canal dehiscence syndrome, labyrinthine fistula [1]