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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. An otoscope can be used to view the eardrum to diagnose a perforation. Perforations may heal naturally ...
Pressure on the outer side of the eardrum normally closely follows ambient pressure, and in the inner ear pressure equalises through the Eustachian tube, which must be open for gas to flow through. If the diver does not equalise sufficiently a pressure difference may develop that is large enough to damage the eardrum as described.
In the middle of the nineteenth century the British otologists James Yearsley and Joseph Toynbee each developed their own form of artificial eardrum. Despite initial enthusiasm for these devices, experience amongst the medical profession over the following half century demonstrated their minimal value in the treatment of a perforated eardrum ...
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Proposition 34 would limit how certain healthcare providers spend revenues from a federal prescription drug program. The measure is an effort by the real estate industry to limit spending by the L ...
Clinical peer review should be distinguished from the peer review that medical journals use to evaluate the merits of a scientific manuscript, from the peer review process used to evaluate health care research grant applications, and, also, from the process by which clinical teaching might be evaluated.
The House Institute Foundation (HIF), formerly the House Ear Institute, is a non-profit 501(c)(3) organization, based in Los Angeles, California, and dedicated to advancing hearing science through research, education, and global hearing health to improve quality of life.
City of Hope is a private, non-profit clinical research center, hospital and graduate school located in Duarte, California, United States.The center's main campus resides on 110 acres (45 ha) of land adjacent to the boundaries of Duarte and Irwindale, with a network of clinical practice locations throughout Southern California, satellite offices in Monrovia and Irwindale, and regional ...