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The EAR Supplement No. 1 to Part 738 (Commerce Country Chart) contains the table with country restrictions. [16] If a line of table that corresponds to the country contains an X in the reason for control column, the export of a controlled item requires a license, unless an exception can be applied. For the purposes of encryption, the following ...
open the ear canal •Seigle's pneumatic speculum: open the ear canal and give a magnification; test the mobility of tympanic membrane; see a magnified image of small perforations; introduce medicine into middle ear; perform Fistula test for vestibular function •Aural/Ear speculum: to fit in and straighten the external ear canal: Lack's ...
The ear canal (external acoustic meatus, external auditory meatus, EAM) is a pathway running from the outer ear to the middle ear. The adult human ear canal extends from the auricle to the eardrum and is about 2.5 centimetres (1 in) in length and 0.7 centimetres (0.3 in) in diameter.
Keratosis obturans is a relatively uncommon ear disease, where a dense plug of keratin, formed by abnormal accumulation of desquamated skin in sheet-like layers , forms in the bony (deeper) part of the external auditory canal. [1]
Facing the inner ear, the medial wall (or labyrinthic wall, labyrinthine wall) is vertical, and has the oval window and round window, the promontory, and the prominence of the facial canal. Facing the outer ear, the lateral wall (or membranous wall), is formed mainly by the tympanic membrane, partly by the ring of bone into which this membrane ...
The tympanic canaliculus (also Jacobson's canaliculus, tympanic canal, inferior tympanic canaliculus, or temporal canaliculus) is a minute canal in the bony ridge that separates the carotid canal and jugular foramen. [1] [2] The proximal opening of the canal is situated upon the inferior surface of the petrous part of the temporal bone; its ...
An otoscope or auriscope is a medical device used by healthcare professionals to examine the ear canal and eardrum. [1] [2] [3] This may be done as part of routine physical examinations, or for evaluating specific ear complaints, such as earaches, sense of fullness in the ear, or hearing loss. [2] [3]
The cochlear duct is part of the cochlea. It is separated from the tympanic duct (scala tympani) by the basilar membrane. [2] It is separated from the vestibular duct (scala vestibuli) by the vestibular membrane (Reissner's membrane). [2] The stria vascularis is located in the wall of the cochlear duct. [2]