PRACTICE+MATH+PROBLEMS

PRACTICE MATH PROBLEMS NUFT 442 (Round answers to the 10th if indicated) 1. Order: Dopamine 5 mcg/kg/min. Available: Dopamine 2 grams in 250 mL 0.9 % NSS. The patient’s weight is 176 pounds. At how many mL/hr should the IV pump be programmed? mL/hr 176 pounds/ 2.2kg/pound =80 kg 250 mL x 5mcg x 60 min x 80 kg x 1 gm x 1 mg = 250x5x60x80 = 2 gm kg/min 1 hr 1000 mg x 1000 mcg 2x1000x1000 6000000 = 3 ml/hr 2000000 PRACTICE DOPAMINE QUESTION The client is ordered Dopamine 4 mcg/kg/min. The dopamine is supplied 2 grams in 250 mL NSS. The client’s weight is 156 pounds. At how many mL/hr should the IV pump be programmed? Round to the tenth. Order: Dobutamine 5 mcg/kg/min. Weight: 357 pounds. Available: Dobutamine 500 mg/250 ml NSS. At how many mL/hr should the IV pump be programmed? mL/hr 357 pounds/2.2 kg/pound = 162.3 kg 250 ml x 5 mcg x 60 min x 162.3 kg x 1 mg = 250x5x60x162.3 = 500 mg kg/min 1 hr 1000 mcg 500x1000 12172500 = 24.3mL/hr 500000 Method #2

250 mL 500 mg × 1 mg 1000 mcg × 5 mcg kg / min × 60 min 1 hour × 1 kg 2.2 lbs × 357 lbs pt = 26,775,000 1,100,000 =24.34=24.3mL/hour PRACTICE DOBUTAMINE QUESTION The client is ordered Dobutamine 3 mcg/kg/min. The client weighs 189 pounds. The Dobutamine is supplied as 500 mg/500 ml NSS. What is the correct infusion pump setting? 2. Order: Lidocaine 4 mg/min. Available: Lidocaine 2 Gm/250 mL D5W. At how many mL/hr should the IV pump be programmed? mL/hr 250 mL x 4 mg x 60 min x 1 Gm = 250x4x60 = 2 Gm min 1 hr 1000 mg 2x1000 60000 = 30 mL/hr 2000 PRACTICE LIDOCAINE QUESTION The client is ordered a lidocaine drip 2mg/min. Lidocaine is supplied as 1gm/100mL. Calculate the flow rate in mL/hr. 3. Order: Vancomycin 500mg in 200mLD5W is to infuse over two hours. Drip factor is 15gtts/mL. What is the rate? X= gtts/minute Drip rate factor =gtts/minute 15 gtts 1 mL × 200 mL 2 hours × 1 hour 60 minutes = 3,000 120 = 25 gtts/minute PRACTICE DRIP RATE FACTOR QUESTION The client is to receive 120 mL of normal saline over 1 hour. The tubing drip factor is 10 gtts/mL. What rate should the nurse use to infuse the fluid? 4. Calculate the total 12-hour (0700-1900) shift intake, both PO and IV separately, for the patient who received:

11000 5000 units kg 2.2 pounds PRACTICE HEPARIN QUESTION The client is ordered 74 units/kg heparin bolus. The client weighs 191 pounds. The heparin is supplied as 5000 units/mL. What should the nurse administer? Round to the tenth. Order: Penicillin G potassium 400,000 units IM q4h. Available: Penicillin G 5,000,000 units. Directions on label state: Add 8.2 mL sterile water to provide 500,000 units/mL. What dose will the nurse administer? mL 400000 = 0.8 mL 500000 PRACTICE RECONSTITUTION PROBLEM The client is ordered 350,000 units of Penicillin G potassium IM q6 hours. The Penicillin G is supplied in a vial with directions on the label; Dilute with 8.2 mL sterile water to provide 500,000 units/mL . What dose should the nurse administer? Round to the tenth. Order: Infuse 250 mL packed cells (1 unit) in 3 hours What is the correct flow rate? mL/hr 250 mL 3 hr = 83.3 mL/hour PRACTICE BLOOD INFUSION QUESTION The client is ordered 1 unit of packed red blood cells (PRBC) over 2 hours. What is the correct flow rate?

Order: Humulin R Insulin IV drip at 6 units/hour. Calculate the flow rate in mL/hour. The medication is supplied Humulin R Insulin 100units/100 mL NSS. mL/hr 100 mL 100 units x 6 units 1 hr = 600 mL 100 hr = 6mL/hr PRACTICE INSULIN QUESTION The client is ordered Humulin R Insulin IV drip at 9 units/hour. The medication is supplied as 120 units in 100 mL NSS. What is the correct flow rate?