Rn Hesi Med Surg Dosage Calculations

Rn Hesi Med Surg Dosage Calculations ( 55 Questions)

Question 1 :

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 mL"]

To answer this question, we need to convert the child's weight from pounds to kilograms,  and then calculate the safe dose range and the amount of suspension needed. 

One pound is equal to 0.454 kg, so 88 pounds is equal to 0.454 x 88 = 39.952 kg. We can  round this to 40 kg for simplicity. 

The safe dose range is 50 mg/kg/24 hour, so for a 40 kg child, the safe dose range is 50 x  40 = 2000 mg/24 hour. This means that the child can receive up to 2000 mg of  amoxicillin in a day. 

The prescription is for 500 mg every 8 hours, which means that the child will receive  three doses in a day, totaling 500 x 3 = 1500 mg. This is within the safe dose range.

 

The suspension is labeled, Amoxicillin Suspension 250 mg/5 mL, which means that  every 5 mL of suspension contains 250 mg of amoxicillin. To find out how many mL of  suspension are needed for one dose of 500 mg, we can use a proportion: 

250 mg / 5 mL = 500 mg / x mL 

Cross-multiplying and solving for x, we get: 

x = (500 x 5) / 250 

x = 10 mL 

Therefore, the nurse should administer 10 mL of suspension for one dose of 500 mg




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