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The healthcare provider prescribes a hydration infusion of normal saline to run over 3 hours at 30 mL/kg for a client who is dehydrated and weighs 70 kg. The nurse should program the infusion pump to deliver how many mL/hour? (Enter numeric value only.)
Correct Answer: 700
Rationale: Volume: 30 mL/kg × 70 kg = 2100 mL. Infusion rate = 2100 / 3 = 700 mL/hour.
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The healthcare provider prescribes cefazolin 800 mg IM every six hours. The available vial is labeled, 'Cefazolin 1 gram,' and the instructions for reconstitution state, For IM use add 2.5 mL sterile water for injection to provide a total volume of 3.0 mL'. After reconstitution, the solution contains how many mg/mL? (Enter numeric value only. If rounding is required, round to the nearest whole number.)
Correct Answer: 333
Rationale: Concentration: 1000 mg / 3 mL = 333.333 mg/mL, rounded to 333.
A client receives a prescription for loratadine suspension 10 mg by mouth once a day. The bottle is labeled 'Loratadine for Oral Suspension, UPS 5 mg per 5 mL.' How many teaspoons should the nurse instruct the client to take? (Enter numerical value only.)
Correct Answer: 2
Rationale: Volume: 10 mg / (5 mg / 5 mL) = 10 mL. Teaspoons: 10 / 5 = 2 teaspoons.
The healthcare provider prescribes enoxaparin 1 mg/kg subcutaneously every 12 hours for a client who weighs 132 pounds. The medication is available in 60 mg/0.6 mL prefilled syringe. How many mL should the nurse administer per day? (Enter numerical value only.)
Correct Answer: 1.2
Rationale: Weight: 132 × 0.454 = 59.928 kg. Dose: 1 mg/kg × 59.928 = 59.928 mg. Volume per dose: (59.928 × 0.6) / 60 = 0.59928 mL. Daily volume: 0.59928 × 2 = 1.19856 mL, rounded to 1.20 mL.
The healthcare provider prescribes amoxicillin 500 mg every 8 hours for a child who weighs 88 pounds. The recommended maximum safe dose is 50 mg/kg/24 hour. The available suspension is labeled, Amoxicillin Suspension 250 mg/5 mL. Based on this child weight, how many mL should the nurse administer? (Enter numerical value only. (If rounding is required, round to the whole number.))
Correct Answer: 10
Rationale: To determine the volume to administer, first convert the child's weight from pounds to kilograms: 88 pounds × 0.454 kg/pound = 39.952 kg (rounded to 40 kg). The safe dose is 50 mg/kg/24 hours, so 50 × 40 = 2000 mg/day. The prescribed dose is 500 mg every 8 hours, or 500 × 3 = 1500 mg/day, which is safe. The suspension is 250 mg/5 mL. Set up a proportion: 250 mg / 5 mL = 500 mg / x mL. Solving, x = (500 × 5) / 250 = 10 mL.
The healthcare provider prescribes magnesium hydroxide 4800 mg by mouth at bedtime for a client with constipation. The bottle is labeled 'Magnesium Hydroxide Saline Laxative, USP 400 mg per 5 mL.' How many ounces should the nurse instruct the client to take with each dose? (Enter numerical value only.)
Correct Answer: 0.41
Rationale: Volume: 4800 mg / (400 mg / 5 mL) = 12 mL. Convert to ounces: 12 × 0.033814 = 0.405768 oz, rounded to 0.41 oz.