Why is it difficult to find an appropriate combination of sedatives, analgesics and paralytics in a patient with increased ICP?
Because patient's are very specific in what they want
They can alter neurological state, masking true neurological changes
Patients are usually allergic to many of these medications
Many patients have comorbidities that make choice of agents difficult
The Correct Answer is B
A. Because patients are very specific in what they want is incorrect because patient preference does not drive the difficulty in medication selection for increased ICP. The challenge is clinical and related to accurate neurological assessment, not patient choice.
B. They can alter neurological state, masking true neurological changes is correct because sedatives, analgesics, and paralytics can suppress consciousness, motor responses, pupillary reactions, and reflexes. In patients with increased ICP, frequent and accurate neurological assessments are critical to detect deterioration. These medications can obscure important changes such as declining level of consciousness or new focal deficits, making it difficult to distinguish medication effects from worsening intracranial pathology.
C. Patients are usually allergic to many of these medications is incorrect because widespread allergies to sedatives, analgesics, and paralytics are uncommon and not the primary concern when managing increased ICP.
D. Many patients have comorbidities that make choice of agents difficult is incorrect because although comorbidities can influence medication selection, this is not the main reason these medications are challenging to use in patients with elevated ICP. The primary concern remains their impact on the ability to perform reliable neurological assessments.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Dribbling of urine is incorrect because this symptom is associated with postrenal causes of acute kidney injury, such as bladder outlet obstruction or urethral stricture. Postrenal AKI occurs when urine cannot exit the urinary tract properly, leading to backpressure on the kidneys. Prerenal AKI, in contrast, is caused by reduced kidney perfusion, not obstruction.
B. Vomiting and diarrhea for 3 days is correct because prolonged fluid loss leads to hypovolemia, which reduces circulating blood volume and renal perfusion. The kidneys rely on adequate blood flow to maintain glomerular filtration rate (GFR). When perfusion is decreased, the kidneys attempt to compensate by activating the renin-angiotensin-aldosterone system, but sustained hypoperfusion can lead to prerenal AKI. This type of AKI is potentially reversible if perfusion is restored promptly, making early recognition and fluid replacement critical. Conditions that commonly cause prerenal AKI include dehydration, hemorrhage, sepsis, heart failure, or severe fluid losses like vomiting and diarrhea.
C. Difficulty starting urine stream is incorrect because this symptom indicates a postrenal obstruction, such as benign prostatic hyperplasia or urethral stricture. In postrenal AKI, urine flow is blocked after it leaves the kidneys, causing backpressure and impaired renal function. This is different from prerenal AKI, where the problem originates beforethe kidneys due to reduced blood flow.
D. History of kidney stones is incorrect because kidney stones can lead to intermittent obstruction of urine flow, resulting in postrenal AKI. While kidney stones can compromise renal function if causing obstruction, they do not directly decrease renal perfusion and therefore are not a risk factor for prerenal AKI.
Correct Answer is A
Explanation
A. Renal biopsy is correct because it is the gold standard for diagnosing intrarenal (intrinsic) causes of AKI, such as acute tubular necrosis, glomerulonephritis, or interstitial nephritis. A biopsy allows direct histological examinationof kidney tissue, confirming the exact type of injury and guiding treatment decisions.
B. CT scan with IV contrast is incorrect because contrast media is nephrotoxicand can actually precipitate contrast-induced AKI. While CT may detect structural abnormalities or obstruction, it does not confirm intrinsic renal pathology.
C. MRI with Gadolinium is incorrect because gadolinium-based contrast is also nephrotoxicin patients with renal impairment, and MRI primarily provides structural imaging rather than histological confirmation of intrarenal injury.
D. ABG is incorrect because arterial blood gas analysis evaluates acid-base balance, oxygenation, and ventilation, not the underlying renal pathology. While ABGs may show metabolic acidosis secondary to AKI, they cannot confirm intrarenal causes.
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