A diver is admitted complaining of ear pain. On examination, the nurse notes a rupture in the tympanic membrane. This hearing loss is the result of an interference with:
1. Bone conduction.
2. Air conduction.
3. Nerve conduction.
4. Middle ear conduction.
Bone conduction.
Rationale: Bone conduction is the conduction of sound to the inner ear through the bones of the skull. If the tympanic membrane is ruptured, the vibrations caused by sound waves are decreased. This results in the vibrations of the bones of the middle ear being decreased and, in turn, conduction of sound by the bones is decreased. Sensorineural losses are caused by damage to auditory nerves or small hair cells in the inner ear. Middle ear conduction is not a mechanism of hearing. Bone conduction occurs when the bones of the middle ear vibrate.
You might also like to view...
A client's medical record reveals presence of an erythematous urticaric rash with pruritus. What assessment findings would the nurse expect?
1. The area of the rash is red. 2. The area has a raised, bumpy texture. 3. The area involved is warm to the touch. 4. The area itches. 5. The area is scaly.
A client with a dog bite is admitted to a local healthcare facility for treatment. What immediate intervention should the nurse perform to treat the client's dog bite?
A) Cleanse the wound with warm, soapy water. B) Apply direct, firm pressure at the site. C) Apply an ice pack or ice bag. D) Apply an Ace roller bandage.
A client with multiple sclerosis has experienced an exacerbation of symptoms, including paresthesias, diplopia, and nystagmus. Which instruction should the nurse provide?
A) Stay out of direct sunlight. B) Restrict intake of high protein foods. C) Schedule extra rest periods. D) Go to the emergency room immediately.
MC Which of the following central venous access devices requires a pulsating action for irrigation?
A. Percutaneous catheter. B. Catheter with Groshong valve. C. Subcutaneous port. D. PICC.