NBME Block 1 and Block 2 for USMLE PDF Download
NBME Block 1 and Block 2 for USMLE one of the best and Essential Guide with Complete concepts of USMLE Examination and now its available for you to read and Gain your Knowledge.and please don’t forget to share and like our Pages.
NBME Block 1 and Block 2 for USMLE
The Eustachian tube (or auditory tube or pharyngotympanic tube) is a tube that links the pharynx to the middle ear. Normally, the Eustachian tube is closed, which helps prevent the inadvertent contamination of the middle ear space by the normal secretions found in the back of the nose. A dysfunctional Eustachian tube that is always open is called a “patulous” Eustachian tube. Patients with this rare condition are plagued by chronic ear infections.
A much more common problem is a failure of the Eustachian tube to effectively regulate air pressure. Partial or complete blockage of the Eustachian tube can cause sensations of popping, clicking, and ear fullness and occasionally moderate to severe ear pain. Young children may describe the popping sensation as “a tickle in my ear.