A patient is ordered 1 mg/kg of furosemide IV push. The patient weights 121 Ibs. The medication is supplied 40 mg/10 mL. How many mL should the nurse administer? (round to the nearest tenth)
The Correct Answer is ["13.8"]
The patient weighs 121 lbs, which is approximately 55 kg (121 ÷ 2.2).
The prescribed dose is 1 mg/kg, so the patient requires 55 mg of furosemide. The medication is supplied at a concentration of 40 mg per 10 mL.
To find out how many mL of furosemide to administer, set up a proportion: 40 mg is to 10 mL as 55 mg is to X mL.
Therefore, the nurse should administer 13.8 mL of furosemide, rounding to the nearest tenth.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["11"]
Explanation
The patient weighs 121 lbs, which is approximately 55 kilograms (121 ÷ 2.2).
Next, multiply the patient's weight in kilograms by the dosage prescribed, which is 20 units/kg. This results in a total dosage of 1100 units (55 kg × 20 units/kg).
The medication is supplied as 25,000 units in 250 mL, so to find out how many mL of medication is needed, set up a proportion: 25,000 units is to 250 mL as 1100 units is to X mL. Solving for X gives you 11 mL (1100 units × 250 mL ÷ 25,000 units).
Therefore, the nurse will administer 11 mL of Heparin to the patient.
Correct Answer is B
Explanation
A. Sodium is crucial for maintaining normal cellular function, especially for nerve impulses and muscle contractions. However, sodium imbalances typically affect the general function of the heart, and sodium abnormalities are not commonly associated with torsades de pointes, which is a type of polymorphic ventricular tachycardia.
B. Magnesium plays a critical role in the electrical stability of the heart and helps regulate potassium and calcium channels, which are involved in the cardiac action potential. Hypomagnesemia (low magnesium) is a well-known risk factor for torsades de pointes, a specific type of polymorphic ventricular tachycardia that is associated with QT interval prolongation. In this case, the magnesium level is 2.5 mg/dL, which is above the normal range (1.6-2.2 mg/dL), suggesting hypermagnesemia.
C. Calcium is vital for proper muscle function, including the heart muscle, and is essential for electrical conduction. Hypocalcemia (low calcium) can lead to QT interval prolongation, which in turn increases the risk for arrhythmias such as torsades de pointes. However, in this case, the calcium level is 8.0 mg/dL, which is only slightly below the normal range (8.2-10.2 mg/dL), making calcium a less likely primary contributor to torsades de pointes in this situation.
D. Potassium plays a crucial role in regulating the resting membrane potential and action potentials in cardiac cells. Hypokalemia (low potassium) can lead to QT prolongation and increase the risk of arrhythmias, including torsades de pointes. However, in this case, the potassium level is 2.8 mEq/L, which is low (normal range: 3.5-5.3 mEq/L), and hypokalemia is more commonly associated with arrhythmias such as torsades de pointes than hyperkalemia (high potassium).
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