A male patient needs 500 mL of normal saline at 25 mL/h. How many hours will it take to deliver all fluid?

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Multiple Choice

A male patient needs 500 mL of normal saline at 25 mL/h. How many hours will it take to deliver all fluid?

Explanation:
Time needed for an IV infusion = total volume ÷ infusion rate. With 500 mL to deliver and a rate of 25 mL per hour, that’s 500 ÷ 25 = 20 hours. You can verify by multiplying back: 25 mL/h × 20 h = 500 mL, so the fluid is delivered in 20 hours. The other times would yield either too little or too much fluid in that period (for example, 15 hours would deliver 375 mL, 10 hours 250 mL, and 25 hours 625 mL).

Time needed for an IV infusion = total volume ÷ infusion rate. With 500 mL to deliver and a rate of 25 mL per hour, that’s 500 ÷ 25 = 20 hours. You can verify by multiplying back: 25 mL/h × 20 h = 500 mL, so the fluid is delivered in 20 hours. The other times would yield either too little or too much fluid in that period (for example, 15 hours would deliver 375 mL, 10 hours 250 mL, and 25 hours 625 mL).

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