A newly admitted client has been prescribed trimethoprim-sulfamethoxazole.
The nurse understands that this medication is contraindicated based on which lab result?
Serum fasting glucose of 101 mg/dL.
Platelets of 160,000 uL.
Hemoglobin of 13.6 g/dL.
Serum creatinine of 2.5 mg/dL.
The Correct Answer is D
Choice A rationale
A serum fasting glucose of 101 mg/dL is slightly above the normal range (70-100 mg/dL), indicating a possible prediabetes condition. However, it is not a contraindication for trimethoprim-sulfamethoxazole.
Choice B rationale
A platelet count of 160,000 uL is within the normal range (150,000-450,000 uL). Therefore, it is not a contraindication for trimethoprim-sulfamethoxazole.
Choice C rationale
A hemoglobin level of 13.6 g/dL is within the normal range for both men (13.5-17.5 g/dL) and women (12.0-15.5 g/dL). Thus, it is not a contraindication for trimethoprim-sulfamethoxazole.
Choice D rationale
A serum creatinine level of 2.5 mg/dL is above the normal range (0.6-1.2 mg/dL for men, 0.5- 1.1 mg/dL for women), indicating impaired kidney function. Trimethoprim-sulfamethoxazole is contraindicated in patients with severe renal insufficiency.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Consuming excessive amounts of antacids, such as TUMS, can lead to metabolic alkalosis. Antacids contain bicarbonate, which can neutralize stomach acid. However, excessive bicarbonate in the body can disrupt the acid-base balance, leading to metabolic alkalosis.
Choice B rationale
Respiratory acidosis is typically caused by conditions that result in hypoventilation, such as lung diseases or drug overdose, not by excessive antacid consumption.
Choice C rationale
Metabolic acidosis is typically caused by conditions that increase acid in the body or decrease bicarbonate, such as kidney disease or lactic acidosis, not by excessive antacid consumption.
Choice D rationale
Respiratory alkalosis is typically caused by conditions that result in hyperventilation, such as anxiety or fever, not by excessive antacid consumption.
Correct Answer is C
Explanation
Choice A rationale
Heparin does not actually thin the blood or make it less thick. Instead, it works by increasing the activity of antithrombin, a protein that inhibits blood clotting. This prevents new clots from forming and existing clots from growing larger.
Choice B rationale
Heparin does not dissolve clots or decrease the formation of platelets. Its primary action is to increase the activity of antithrombin, which in turn inactivates thrombin and factor Xa, two key players in the blood clotting process.
Choice C rationale
This statement is accurate. Heparin does not thin the blood; instead, it prevents new clots from forming and existing clots from growing larger. It does this by increasing the activity of antithrombin, which in turn inactivates thrombin and factor Xa.
Choice D rationale
Heparin does not decrease the number of platelets or make the blood flow more easily. Its primary action is to increase the activity of antithrombin, which in turn inactivates thrombin and factor Xa.
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