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Visual and Auditory SystemsMedical-Surgical Nursing-7th edition

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A-scan ultrasonography is used to...
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Get an axial length measurement for calculating power of an intraocular lens implanted after cataract extraction.
B-scan ultrasonography is used for...
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The diagnosis of ocular pathology such as intraocular foreign bodies or tumors, vitreous opacities and retinal detachments.
How is an A-scan ultrasonography performed?
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The cornea is anesthetized and a probe is flattened against the cornea
How is a B scan ultrasonography performed?
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The cornea is anesthetized and a probe is placed against the eyelid
What is the purpose of Fluorescein angiography?
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It provides diagnostic information regarding the retina and about flow of blood though pigment epithelial and retinal vessels.
How is Fluorescein administered for an angiography?
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It is intravenously injected into the antecubital or other peripheral vein.
What are the concerns related to fluorescein angiography?
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Fluorescein is toxic to tissues so a nurse needs to monitor for extravasation. Occasionally severe allergic reactions can occur so a nurse needs to be familiar with the emergency equipment and procedures.
What are some normal responses to the fluorescein angiography that a nurse should tell the patient about?
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The dye can cause nausea or vomiting and yellow discoloration of urine and skin (which goes away)
What is the Amsler Grid Test?
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A self administered test used to monitor macular problems.
This ocular test is a handheld card printed with a grid of lines (like graph paper). The patient fixates on a center dot and records any waving, missing or distorted grid lines.
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The Amsler grid test. Self-administered to monitor for macular changes.
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This ocular test is commonly used on diabetic patients to locate diabetic neuropathy prior to laser destruction of neovascularization (new vessels developed from inflammation or a tumor)
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Fluorescein angiography
Why is information from a patient about food and environmental allergies important to know about when getting a history related to the ears?
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Allergies can cause the eustachian tube to become edematous and prevent aeration of the middle ear
What can cause congenital hearing loss?
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Infectious diseases (rubella, influenza, syphilis, etc.), teratogenic medications or hypoxia in the first trimester.
Which symptoms related to the ears are important to record in the patient's own words?
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Dizziness, tinnitus, and hearing loss (it can help differentiate the cause)
The age of onset of presbycusis follows a ________ pattern.
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Familial
Tinnitus can result from high ______ intake.
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Aspirin
Which groups of drugs are potentially(and commonly) ototoxic? (7)
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Aminoglycosides, antibiotics, salicylates, antimalarial agents, chemotherapy agents, diuretics, and NSAIDS.
Who is most likely to identify gradual hearing losses?
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Those who communicate most frequently with the patient.
T/F The use of hearing aids can cause trauma and increase the risk of infection.
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TRUE
What substances increase the amount of endolymph in the inner ear system?
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Alcohol and sodium
A syndrome characterized by recurring episodes of hearing loss, tinnitus, vertigo and aural fullness. It often results in gradually progressive deafness….
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Meniere's disease
  
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