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A patient is ordered to receive sodium supplementation by intravenous infusion of a sodium phosphate dibasic...

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Advance Math

A patient is ordered to receive sodium supplementation byintravenous infusion of a sodium phosphate dibasic solution[Na2H PO4 ,MW=141.96 g/mol]. The patient is ordered to receive 0.5 mEq ofNa + ions per hour.

A 500 mL intravenous bag is prepared that contains 47 mL of a 1%solution of sodium phosphate dibasic. What should be the infusionrate (in units of mL/min) necessary to produce the ordereddose of 0.5 mEq/hr of sodium?

(Note: Consider the total solution volume to be 500 mL. Alsoassume the sodium phosphate dibasic salt completely disassociatesin solution. Please do not assume the specifics of this questionare exactly clinically relevant due to the variability in thisquestion.)

Answer & Explanation Solved by verified expert
3.6 Ratings (404 Votes)

solution)

1% Na2H PO4  means 1 gram of Na2H PO4 in 100 ml of the solution .

So amount of Na2H PO4 in 47 ml = 1 * 47 /100= 0.47 gram = 470 mg

So number of moles of Na2H PO4 = 470/141.96 = 3.31 millimoles

So number of equivalents of po4- = 3.31 new

So 3.31 m Eq of po4- present in 500 ml of solution.

So 0.5 mEq present in 500/3.31 * 0.5 = 302 ml

Infusion rate per minute = 302/60 = 5.03 ml/minute.

So the infusion rate should be 5.03 ml/minute.

hence solved
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