The flow rate to infuse 1000 ml of NS over 4 hours if the set delivers 10 gttsml?

Answer 1

If the set delivers 10 drops per ml, you want a total of 1000x10 drops of normal saline over 4 hours. This is 10000 drops and now divide that by 4 hours, but you will want the 4 hours as minutes. So 4 hours is 240 minutes. Then answer must be in the form drops per minute so divide 10000 drops by 240 minutes and the exact answer is 125/3 which is 41.67 drops per minute. We need can't measure part of a drop so round this off to 42 drops per minute. Now let's check the answer. 42 drops per minute x240 minutes=10000 drops which is 1000 ml. DONE