The nurse is providing teaching on the miotic medication the client has been prescribed for glaucoma. The client asks the nurse about the purpose of the medication. Which response should the nurse provide to the client?
"The medication causes the pupil to constrict and will lower the pressure in the eye."
"The medication will help dilate the eye to prevent pressure from occurring."
"The medication will relax the muscles of the eyes and prevent blurred vision."
"The medication will help block the responses that are sent to the muscles in the eye."
The Correct Answer is A
A. Miotic medications work by constricting the pupil, which opens the trabecular meshwork and facilitates the drainage of aqueous humor, thus lowering intraocular pressure in clients with glaucoma.
B. Miotics do not dilate the pupil; they constrict it. Dilation would actually increase intraocular pressure, which is not therapeutic in glaucoma.
C. While these medications do affect eye muscles, they do not specifically prevent blurred vision; their primary effect is on eye pressure.
D. Miotics do not block nerve responses; they work by direct action on the eye muscles to promote fluid drainage and reduce pressure.
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Correct Answer is D
Explanation
A. Increased insulin production would not cause polyuria and low specific gravity urine; rather, hyperglycemia from lack of insulin can cause high specific gravity due to glucose in urine.
B. Increased ACTH affects cortisol production but is not directly related to urine concentration or polyuria.
C. Low T3 and T4 levels are associated with hypothyroidism, which typically does not cause polyuria or decreased specific gravity.
D. Insufficient ADH, as seen in diabetes insipidus, leads to the inability to concentrate urine, resulting in a low specific gravity, polyuria, and nocturia due to excessive water loss.
Correct Answer is A
Explanation
A. Chvostek's sign, a facial muscle spasm upon tapping, is a clinical indicator of hypocalcemia, often caused by accidental removal or damage to the parathyroid glands during thyroid surgery.
B. Hypercalcemia does not typically cause a positive Chvostek’s sign.
C. Hypokalemia affects muscle and cardiac function but does not result in a positive Chvostek’s sign.
D. Hyponatremia does not produce Chvostek's sign, which is specific to hypocalcemia.