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A doctor orders 40 mEq IV of potassium chloride. Available is 5 mEq/hr. The supply is 40 mEq per 100 mL. How many mL of potassium chloride per hour will the nurse give?

Answer :

The doctor orders 40 meq of IV potassium chloride, but the available amount is 5 meq/hr, with the supply of 40 meq per 100 ml. The nurse will give 0.8 ml of potassium chloride per hour.

Solution: We need to use the formula of intravenous infusion to solve the problem.

IV infusion (ml/hr) = Total volume of IV fluid (ml) × Drip rate (gtts/min) / Time of infusion (min)1000 ml = 1 liter.

We need to use this to convert ml into liters as well.

Therefore,IV infusion (in liters/hr) = Total volume of IV fluid (in liters) × Drip rate (gtts/min) / 60 (min)

First, we need to find out the drip rate. Drip rate = Ordered dose / Hourly volume

Drip rate = 40 meq / 5 meq/hr

Drip rate = 8 gtts/min

Then, we need to find out the total volume of IV fluid.

Total volume of IV fluid = Ordered dose / Available dose

Total volume of IV fluid = 40 meq / 40 meq / 100 ml

Total volume of IV fluid = 100 ml.

Then, we need to find out the IV infusion in liters per hour.

IV infusion (in liters/hr) = Total volume of IV fluid (in liters) × Drip rate (gtts/min) / 60 (min)IV infusion

= 100 ml / 1000 ml × 8 gtts/min / 60 (min)IV infusion

= 0.8 ml/min.

Therefore, the nurse will give 0.8 ml of potassium chloride per hour.

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