WBR0265

Author	PageAuthor::Vendhan Ramanujam
Exam Type	ExamType::USMLE Step 2 CK
Main Category	MainCategory::Internal medicine
Sub Category	SubCategory::Head and Neck
Prompt	[[Prompt::Following a large explosion at a construction site during excavation, its workers are brought to the ER. While examining them none appear to be injured. But some were diagnosed with hearing loss following the explosion. They were exposed to sound pressure levels of 190 dB. Which of the following is the most likely type of hearing loss]]
Answer A	AnswerA::Permanent conductive hearing loss
Answer A Explanation	AnswerAExp::'''Incorrect'''-Since spontaneous and surgical repair of ruptured tympanic membrane is possible, permanent conductive hearing loss usually does not occur.
Answer B	AnswerB::Temporary conductive hearing loss
Answer B Explanation	[[AnswerBExp::Correct-Acute exposures to sound pressure levels above 180 dB result in traumatic rupture of the tympanic membrane and conductive hearing loss. The rupture should repair spontaneously unless infection occurs. If the loss persists for more than 3 months, surgical repair is possible.]]
Answer C	AnswerC::Temporary sensorineural hearing loss
Answer C Explanation	AnswerCExp::'''Incorrect'''-Sensorineural hearing loss is generally due to fractures or trauma to the inner ear.
Answer D	AnswerD::Permanent sensorineural hearing loss
Answer D Explanation	AnswerDExp::'''Incorrect'''-Sensorineural hearing loss is generally due to fractures or trauma to the inner ear.
Answer E	AnswerE::Mixed conductive and sensorineural hearing loss
Answer E Explanation	AnswerEExp::'''Incorrect'''-Mixed hearing loss can occur secondary to fractures of the temporal bone when both the middle and the inner ear are traumatized.
Right Answer	RightAnswer::B
Explanation	[[Explanation::Acute exposures to sound pressure levels above 180 dB result in traumatic rupture of the tympanic membrane and conductive hearing loss. The rupture should repair spontaneously unless infection occurs. If the loss persists for more than 3 months, surgical repair is possible. Educational Objective: Acute exposures to sound pressure levels above 180 dB result in traumatic rupture of the tympanic membrane and a temporary conductive hearing loss, which reverses either spontaneously or by surgical repair. Educational Objective: References: ]]
Approved	Approved::Yes
Keyword
Linked Question	Linked::
Order in Linked Questions	LinkedOrder::