IHS Questions- For License Prep Complete Questions & Solutions!

The adult ear canal: - ANSWER Rises upward and forward then descends to the drum The isthmus is: - ANSWER Where the canal narrows to enter the temporal bone The pinna and the external canal together: - ANSWER -Gather and reinforce accoustical signals -With the irregular shape of the auricle, cause increases and decreases at different frequencies as the sound arrives at the ear. -Forms a resonating tube. The average resonant frequency of the ear canal plus concha is: - ANSWER 2700 Hz. The dividing line between the external ear and the middle ear is the: - ANSWER Tympanic membrane. The ear canal contains: - ANSWER Cilia, ceruminous glands. sebaceous glands. The vagus nerve (Xth cranial) is found: - ANSWER Along the bottom of the ear canal. These are parts of the tympanic membrane: - ANSWER Pars tensa, Pars flaccida, Umbo. An otoscopic inspection should reveal: - ANSWER A clear view of the white tympanic membrane. These are parts of the pinna: - ANSWER Tragus, intertragal notch, triangular fossa. Atresia refers to: - ANSWER A closure of the external auditory canal. Perforation of the eardrum can be caused by: - ANSWER -An infection -A fracture of the temporal bone -A nearby explosion. These are types of hearing loss: - ANSWER -Conductive -Central -Sensorineural Conductive losses may be caused by: - ANSWER A prolapsed canal Impacted cerumen Which surgical technique repairs the tympanic membrane? - ANSWER Myringoplasty A cholesteatoma can be described as: - ANSWER A pouch of skin filled with epithelial debris. When an excess of cerumen or a blockage of cerumen is detected, the hearing aid specialist should: - ANSWER Refer the patient to a physician. A swollen ear may be caused by: - ANSWER -Eczema -Otitis externa -Dermatitis Tympanosclerosis may be described as: - ANSWER Calcium deposits. A tympanic membrane perforation may cause a: - ANSWER Conductive loss.