A miotic medication has been prescribed for a client with acute angle-closure glaucoma. The client asks the nurse about the purpose of the medication. Which response should the nurse provide to the client?
"The medication will help block the neural impulses that are sent to the muscles in the eye."
"The medication will help dilate the pupil to allow drainage of fluid to occur."
"The medication causes the pupil to constrict, opening the angle where the iris meets the cornea."
"The medication pulls excess aqueous humor from the eye, into the bloodstream."
The Correct Answer is C
A. This statement is not accurate in the context of miotic medications. Miotic drugs do not work by blocking neural impulses to the muscles. Instead, they directly affect the eye's pupil size and fluid dynamics. This response does not correctly describe the action of miotic agents.
B. This response is incorrect because miotic medications actually constrict the pupil, not dilate it. In acute angle-closure glaucoma, dilation of the pupil would worsen the condition by further blocking the drainage angle. Miotics are used to constrict the pupil, which helps open the angle between the iris and the cornea, thereby facilitating fluid drainage.
C. Miotic medications cause the pupil to constrict (miosis), which helps in opening the narrow angle between the iris and the cornea. In acute angle-closure glaucoma, the angle is closed or narrow, preventing proper drainage of aqueous humor. By constricting the pupil, miotic medications can help to relieve this obstruction and allow better drainage of fluid, thereby reducing intraocular pressure.
D. This statement is incorrect regarding the action of miotic medications. Miotic drugs do not pull aqueous humor into the bloodstream. Their primary effect is on the pupil's size and the angle of the eye to improve drainage. Medications that reduce aqueous humor production or increase its outflow, such as carbonic anhydrase inhibitors or prostaglandin analogs, are responsible for these actions
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Hypernatremia (elevated sodium levels) is not a common sign of Addisonian crisis. In Addisonian crisis, the lack of aldosterone leads to sodium loss, which often results in hyponatremia (low sodium levels) rather than hypernatremia. The patient might also experience dehydration and electrolyte imbalances, but hypernatremia is not typical in this scenario.
B. Fluid volume overload is not characteristic of Addisonian crisis. Instead, Addisonian crisis often leads to fluid volume deficit due to the loss of aldosterone, which impairs sodium and water retention. This can result in dehydration and low blood volume rather than fluid overload.
C. Hypokalemia (low potassium levels) is not typically associated with Addisonian crisis. In fact, the lack of aldosterone in Addisonian crisis leads to potassium retention, resulting in hyperkalemia (elevated potassium levels). Therefore, monitoring for hypokalemia is not relevant in the context of Addisonian crisis following a bilateral adrenalectomy.
D. Hypoglycemia (low blood glucose levels) is a key sign of Addisonian crisis. Cortisol plays a crucial role in glucose metabolism and maintaining blood glucose levels. With the loss of cortisol production after a bilateral adrenalectomy, patients may experience hypoglycemia, which can be a critical indicator of Addisonian crisis.
Correct Answer is B
Explanation
A. A pneumothorax, or collapsed lung, occurs when air enters the pleural space, leading to lung collapse. While a pneumothorax can be a serious issue, it is not a typical finding associated with advanced COPD.
B. Hyperinflation is a hallmark finding of advanced COPD. It occurs when air becomes trapped in the lungs due to obstructed airways and damaged alveoli, leading to increased lung volumes and overexpansion of the lungs. On a chest X-ray, hyperinflation appears as an increased retrosternal air space, flattened diaphragm, and possibly increased lung volumes.
C. The presence of masses on a chest X-ray might suggest malignancies or other lung pathologies, but it is not a typical finding in COPD. While lung cancer can co-occur with COPD, masses themselves are not a direct indicator of COPD but rather a potential separate issue that would need further evaluation.
D. Atelectasis refers to the collapse of lung tissue due to loss of air in the alveoli, which can occur from various causes including obstruction or compression of the lung. While atelectasis can be seen in various pulmonary conditions, it is not specific to advanced COPD.
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