The healthcare provider orders Lovenox 1 mg/kg SQ now. Your patient weighs 198 lbs. The available concentration is Lovenox 30 mg/0.3 mL. How many mL will the patient receive?
0.9 mL
1.2 mL
0.6 mL
0.3 mL
The Correct Answer is A
Choice A reason: Patient weight: 198 lbs ÷ 2.2 = 90 kg. Dose: 1 mg/kg × 90 kg = 90 mg. Volume: 90 mg ÷ (30 mg/0.3 mL) = 90 × 0.3/30 = 0.9 mL. This delivers the correct anticoagulant dose for conditions like DVT, making it the accurate choice.
Choice B reason: For 90 kg (198 lbs ÷ 2.2), the dose is 90 mg. Volume: 90 mg ÷ (30 mg/0.3 mL) = 0.9 mL. Choice B (1.2 mL) delivers 120 mg (1.2 × 30/0.3), overdosing Lovenox, increasing bleeding risk, making it incorrect.
Choice C reason: The correct volume for 90 mg is 0.9 mL (90 ÷ 30 mg/0.3 mL). Choice C (0.6 mL) delivers 60 mg (0.6 × 30/0.3), underdosing Lovenox, reducing anticoagulant efficacy, which could fail to prevent thrombosis, making this choice incorrect.
Choice D reason: For 90 mg, the volume is 0.9 mL. Choice D (0.3 mL) delivers 30 mg (0.3 × 30/0.3), significantly underdosing Lovenox for a 90 kg patient, risking inadequate anticoagulation and thrombotic events, making this choice incorrect.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: Inhaled glucocorticoids are used daily in COPD to reduce inflammation and prevent exacerbations. This shows correct understanding, making it the correct choice.
Choice B reason: Glucocorticoids are for daily maintenance, not as-needed use, which is for beta2-agonists. This misunderstanding is incorrect for the medication regimen.
Choice C reason: Beta2-agonists are used as needed for symptom relief, not daily, in stable COPD. This is incorrect, as daily use is for maintenance drugs.
Choice D reason: Beta2-agonists relax airways, not suppress inflammation; that’s the glucocorticoid’s role. This incorrect mechanism shows misunderstanding, so it’s incorrect.
Correct Answer is B
Explanation
Choice A reason: Hydrochlorothiazide can treat diabetes insipidus by reducing urine output via sodium reabsorption, but this is a secondary use. Its primary role is in hypertension management, as it lowers blood pressure by decreasing blood volume, making this choice less accurate.
Choice B reason: Hydrochlorothiazide, a thiazide diuretic, is primarily used for hypertension by promoting sodium and water excretion, reducing blood volume and vascular resistance. It’s a first-line treatment per guidelines, effectively lowering blood pressure, making this the correct choice for its primary indication.
Choice C reason: Hydrochlorothiazide treats edema in heart failure or renal disease by increasing diuresis, but this is a secondary indication. Its primary use is hypertension, where it reduces blood pressure more consistently across patients, making this choice less accurate than hypertension.
Choice D reason: Hydrochlorothiazide doesn’t protect against postmenopausal osteoporosis. While thiazides reduce urinary calcium loss, they’re not indicated for osteoporosis prevention, unlike bisphosphonates. Their primary role is hypertension management, making this choice incorrect for the drug’s main therapeutic use.
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