The practical nurse (PN) reviews instructions for use of polyethylene glycol with a client scheduled for a colonoscopy. Which instruction should the PN include?
Drink each glass of solution rapidly at regular specified time intervals
Dilute the liquid medication with fruit juice to mask the flavor
Drink the solution with the evening meal before the scheduled exam
Report the onset of watery diarrhea to the healthcare provider (HCP)
The Correct Answer is A
Choice A reason: Polyethylene glycol, a bowel prep for colonoscopy, requires rapid drinking at specified intervals to ensure effective colon cleansing. This osmotic laxative draws water into the bowel, promoting evacuation. Consistent, rapid intake ensures complete bowel clearance, critical for clear visualization during the procedure.
Choice B reason: Diluting polyethylene glycol with fruit juice is incorrect, as it may alter the solution’s osmotic balance, reducing efficacy. The preparation must remain undiluted to draw sufficient water into the colon for cleansing, making this instruction inappropriate for achieving a clear colonoscopy.
Choice C reason: Drinking polyethylene glycol with a meal is incorrect, as food can interfere with bowel cleansing. The solution is taken on an empty stomach, typically the day before the exam, to ensure the colon is clear, making this instruction counterproductive to the prep’s purpose.
Choice D reason: Watery diarrhea is the expected outcome of polyethylene glycol, not an adverse effect requiring reporting. It indicates effective bowel cleansing for colonoscopy. Instructing to report this normal response is unnecessary and may cause confusion, as diarrhea is the goal of the preparation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: Using an Amsler grid monitors macular degeneration, not sildenafil-related visual changes, which include color tinting or blurred vision due to PDE5 inhibition affecting retinal blood flow. This is not a standard monitoring tool for sildenafil side effects, making it inappropriate for this context.
Choice B reason: Instilling eye drops is irrelevant, as sildenafil’s visual changes are systemic, caused by its effect on retinal phosphodiesterase, not a local eye condition treatable with drops. No evidence supports eye drops for this side effect, making this choice incorrect and ineffective.
Choice C reason: Wearing dark glasses may reduce light sensitivity but does not address sildenafil’s visual side effects, like blue-green color distortion, caused by altered retinal signaling. This is a temporary, drug-induced effect, and glasses do not mitigate the underlying issue, making this choice inadequate.
Choice D reason: Reporting visual changes immediately is critical, as sildenafil can cause rare but serious effects like non-arteritic anterior ischemic optic neuropathy, impairing retinal blood flow. Prompt reporting allows the provider to assess severity, adjust dosing, or discontinue the drug to prevent permanent vision loss.
Correct Answer is C
Explanation
Choice A reason: Appetite changes may occur with levothyroxine due to metabolic effects, but they are not the most critical side effect. Excessive thyroid hormone can overstimulate metabolism, but cardiovascular effects, like tachycardia, are more immediate and dangerous, making appetite monitoring less urgent.
Choice B reason: Sleep disturbances may result from levothyroxine’s stimulatory effects, but they are less severe than cardiovascular risks. Overdose can cause insomnia by increasing metabolism, but heart rate is a more direct indicator of hyperthyroidism, which poses greater health risks, making this choice secondary.
Choice C reason: Heart rate is critical to monitor, as levothyroxine increases metabolism, potentially causing tachycardia or arrhythmias if overdosed. Excess thyroid hormone mimics hyperthyroidism, stressing the cardiovascular system, which can lead to palpitations or heart failure, making this the most important parameter for side effect detection.
Choice D reason: Daily weights track fluid or metabolic changes but are less specific for levothyroxine side effects. Weight loss may occur with excess dosing, but cardiovascular effects, like increased heart rate, are more immediate and life-threatening, requiring closer monitoring than weight fluctuations.
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