Dosage Calc Practice Exam Questions

docx

School

Herzing University *

*We aren’t endorsed by this school

Course

223

Subject

Mathematics

Date

Jan 9, 2024

Type

docx

Pages

Uploaded by CommodoreGalaxyRam31

Dosage Calc Practice Exam Questions & Answers Question 1: A patient is to receive 850 milliliters of 5% D/W in 18 hours IV. The flow rate is 8 drops per minute. Four hours later, 600 milliliters remain in IV bag. Recalculate the flow rate. The drop factor is 10 gtts/mL Round to the nearest whole number. Enter numeric value only. a. First, we'll determine the amount of fluid that has been infused in the initial four hours: Initial amount of fluid to be infused = 850 mL Amount remaining after 4 hours = 600 mL Amount infused in 4 hours = Initial amount - Remaining amount Amount infused in 4 hours = 850 mL - 600 mL Amount infused in 4 hours = 250 mL b. Now, let's find out how much fluid should be infused in the remaining 18 - 4 = 14 hours: Total time for infusion = 18 hours Time elapsed = 4 hours Remaining time for infusion = Total time - Time elapsed Remaining time for infusion = 18 hours - 4 hours Remaining time for infusion = 14 hours Remaining amount to be infused = Total amount - Amount infused Remaining amount to be infused = 850 mL - 250 mL Remaining amount to be infused = 600 mL c. Now, we need to calculate the flow rate for the remaining 600 mL over the 14 hours. To find the flow rate, we'll use the formula: Flow rate (mL/hour) = Amount of fluid to be infused / Time remaining Flow rate (mL/hour) = 600 mL / 14 hours Flow rate (mL/hour) ≈ 42.86 mL/hour (rounded to 2 decimal places) d. Lastly, we'll convert this flow rate to drops per minute. The drop factor is 10 gtts/mL. Flow rate (drops per hour) = Flow rate (mL/hour) × Drop factor Flow rate (drops per hour) = 42.86 mL/hour × 10 gtts/mL Flow rate (drops per hour) = 428.6 gtts/hour e. To calculate the new drop rate per minute: Flow rate (drops per minute) = Flow rate (drops per hour) / 60 minutes Flow rate (drops per minute) = 428.6 gtts/hour / 60 minutes Flow rate (drops per minute) ≈ 7.14 drops per minute Rounded to the nearest whole number, the recalculated flow rate is approximately 7 drops per minute.

Question 2: Order: Prednisone oral suspension 10 mg every 8 hours. The child weighs 40 lbs. The safe dose range is 0.14 - 2 mg/kg/day divided t.i.d. (3x/day) or q.i.d. (4x/day). a.) What is the child's weight in kilograms? Round to nearest tenths. Enter numeric value only. _____ kg b.) Is this a safe dose? YES or NO _______ c.) If yes, and the medication is available in 5mg/5ml, how much will the nurse administer per dose? Round to nearest tenth. Enter numeric value only. ___ mL To solve this problem, we'll go step by step: a.) First, let's convert the child's weight from pounds to kilograms. 40lbs / 2.2kg =18.18g Rounded to the nearest tenth, the child's weight is approximately 18.2 kg. b.) To determine if the prescribed dose falls within the safe range, we'll use the safe dose range provided: 0.14 - 2 mg/kg/day divided t.i.d. or q.i.d. For this child: Minimum safe dose: 0.14mg/kg/day ×18.2kg = 2.548 mg/day ` Maximum safe dose: 2 mg/kg/day×18.2 kg=36.4 mg/day The prescribed dose is 10mg every 8 hours which means three times a day: 10 mg/dose×3 doses/day= 30 mg/day Since 30 mg/day falls in the safe range of 2.534 mg/day 36.2 mg/day, the prescribed dose is in safe range Therefore, the answer to part b is YES. c.) If the medication is available in 5mg/5ml 5 mg/5ml, and the prescribed dose is 10 mg per dose, we can calculate the required volume: IDK HOW BUT THE ANSWER IS 10 Question 3: Order: Nipride 2.5 mcg/kg/min. Supply: Nipride 50 mg in 250 mL D5W. Patient weight is 50 kg. What is the infusion rate? ___ mL/hr. Round to the nearest whole number. Step 1: To calculate the infusion rate for Nipride, you'll first need to find the total dosage in mcg/min and then convert it to mL/hr. Given that the dose is 2.5 mcg/kg/min for a 50 kg patient and concentration of Nipride is 50 mg in 250 mL: 1. Convert the patient's weight to mcg/min: 2.5 mcg/kg/min × 50 kg = 125 mcg/min 2. Convert the concentration of Nipride from mg to mcg: 50 mg = 50,000 mcg (since 1 mg = 1,000 mcg) 3. Calculate the volume needed per minute: 125 mcg/min / 50,000 mcg = 0.0025 (This represents the fraction of the total volume needed per minute) 4. Convert the volume per minute to mL/hr: 0.0025 × 250 mL = 0.625 mL/min 5. Convert to mL/hr and round to the nearest whole number: 0.625 mL/min × 60 min/hr = 37.5 mL/hr (rounded to the nearest whole number) Therefore, the infusion rate is approximately 38 mL/hr.

Question 4: Order: Phenytoin 50 mg every 12 hours for a child weighing 70 lb. Available: Dilantin 30mg/5ml. The recommended daily oral dose for a child is 5 - 7 mg/kg/day in divided dosages every 12 hours. a.) What is the child's weight in kilograms? Round to the nearest tenth. Enter numeric value only. _____ kg b.) Safe recommended dosage range for this child is _____ to _____ mg/day. Round to nearest tenths. c.) Is the order safe? YES or NO ______ d.) If yes, how many ml would the nurse give daily? If no, enter 0. Round to nearest tenth. Enter numeric value only - Answer for A: 31.8 - Answer for B: 159 - Answer for C: no - Answer for D: 0 Question 5: The order reads: 1800 mL 5% D/W for 12 hr. IV. The flow rate is 17 drops per minute. When the nurse assessed the infusion, 400 milliliters had infused in 4 hours. Recalculate the flow rate. The drop factor is 15 gtt/mL. Round to the nearest whole number if required. Enter numeric value only. Step 1: 1800 mL – 400 mL = 1,400 mL left to infuse Step 2: 12 – 4 = 8 hours remaining Step 3: 15 x (1,400 / 8) = 2,265 Step 4: 2,625 / 60 = 43.75 which rounded to nearest whole number is 44 Therefore, answer is 44 gtts/min Question 6: Order: Dopamine 7 mcg/kg/min. Supply: Dopamine 400 mg in 250 mL D5W. Patient weight is 57 kg. What is the infusion rate? mL/hr. Round to the nearest whole number. Enter numeric value only. Step 1: 7 mcg x 57 kg = 399 mcg/min Step 2: convert 400 mg to mcg. So, 400 mg = 400,000 mcg Step 3: 399 / 400,000 = 0.0009975 total vol per min Step 4: 0.0009975 x 25 mL = 0.249 Step 5: 0.249 x 60 = 14.9 which rounded to nearest whole number is 15 Therefore, answer is 15 mL/hr Question 7: Order: 20 mg/kg dose of amoxicillin oral suspension for a toddler who weighs 20 lb. How many mg should be administered? Round to the nearest tenths. Enter numeric value only. Step 1: convert 20 lbs. to kg. 20 / 2.2 = 9.09 kg Step 2: 20mg x 9.09 kg = 181.8 Answer is 181.8 Question 8: A patient scheduled for surgery is ordered to receive 1000 LR at 150 ml/hr. If the infusion is started at 0500, what time will the infusion be completed? Answer in military time. Step 1: 1,000 / 150 = 6.6 repeating Step 2: 6.6 is 6 hours and however many minutes Step 3: Infusion started at 0500, so count forward from there 6.6 hours Answer is 1142 or 1140

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

Question 9: Order: Dobutamine 7.5 mcg/kg/min. Supply: Dobutamine 250 mg in 250 mL D5W. Patient weight is 71 kg. What’s the infusion rate? mL/hr. Round to nearest whole number. Enter numeric value only. Step 1: 7.5 mcg x 71 kg = 532.5 mcg/min Step 2: convert 250 mg to mcg, so 250 mg = 250,000 mcg Step 3: 532.5 / 250,000 = 0.00213 total vol per min Step 4: 0.00213 x 250 mL = 0.5325 Step 5: 0.5325 x 60 = 31.95 rounded to the nearest whole number is 32 Therefore, answer is 32 mL/hr Question 10: Hudson has been assessed by the clinical nutritionist after g‐tube placement for nutritional management. He needs to receive 2200 calories per day. If each 8 oz can of formula contains 125 calories, how many cans of formula will you need to order to total Hudson’s daily requirement? Round to nearest whole number. Enter numeric value only. Step 1: child needs 2,200 calories/day. Each 8oz can has 125 calories Step 2: 2,200 / 125 = 17.6 rounded to the nearest whole number is 18 Therefore, answer is 18 Question 11: The physician's order reads: 500 mL 0.9% NS IV, infuse at rate of 3.5 mL/min. Calculate the flow rate in milliliters per hour. mL/hr Enter numeric value only. Step 1: given 3.5 mL/min and need to convert minutes to hours Step 2: multiply 3.5 x 60 = 210 mL/hr Question 12: Diltiazem hydrochloride, an antihypertensive IV drug has been prescribed stat for a laboring patient. The order is 0.25 mg/kg slow IV bolus recommended dose. Weight of the patient is 185 lb. The drug is available in a vial labeled 5mg/mL. How many mL will you administer? Round to the nearest tenths. Enter numeric value only. Step 1: convert 185 lbs. to kg so 185 / 2.2 = 84.1 kg Step 2: 0.25 x 84.1 = 21.02 mg/min Step 3: 21.02 / 5 = 4.2 Question 13: Rachel has an order to receive ceftriaxone 500mg IM STAT. The pharmacy sends up a powder form of the mediation that must be reconstituted. The directions for reconstitution are: “Add 1.5 ml of NS to yield 250mg/ml” How many ml do you need? Round to nearest tenth. Enter numeric value only. Step 1: 500 mg / 250 mg = 2 Question 14: A health care provider has ordered Humulin regular insulin at U-100 16 units/hr. IV solution contains 100 units of Humulin regular insulin in 250 mL of 0.9% NS. Calculate flow rate in mL/hour. Enter numeric value only. Step 1: 100 units / 16 units = 6.25 Step 2: 250 mL / 6.25 = 40

Question 15: Order: Amoxicillin 125 mg for a child weighing 34.32 lb. Available: Amoxicillin suspension 125 mg/5 ml. This has been determined to be a safe dose. What dose should the nurse give? Round to the nearest tenths. Enter numeric value only. Step 1: 125 mg / 125 mg = 1 Step 2: you are left with 5 mL Therefore, answer is 5 mL Question 16: Order: Tylenol 10 mg/kg PO prn temp. Supply: liquid labelled 165 mg/5 mL. Child's weight is 10 kg. What is the quantity to administer? Round to the nearest whole number. Enter numeric value only. Step 1: 165 mg / 5 mL = 33 mg/mL Step 2: 33 mg / 10 mg = 3.3 rounded to the nearest whole number is 3 Therefore, answer is 3 Question 17: The prescriber ordered an infusion of 120 milliliters per hour. Calculate the flow rate when the drop factor is 15 gtts/mL. Round to the nearest whole number if required. Enter numeric value only. Step 1: use drop factor formula which is drop factor x (mL / time in minutes) Step 2: 15 x (120 mL / 60 minutes) = 30 Question 18: Order: Diphenhydramine 5 mg/kg/day IV prn. Supply: vial labeled 50 mg/mL. Child's weight is 12 kg. What is the quantity to administer? Round to the nearest tenths. Enter numeric value only. Step 1: 5 mg x 12 kg = 60 Step 2: 60 / 50 = 1.2 Question 19: Order: Phenytoin 75 mg by mouth every 12 hours for a child weighing 66 lb. On Hand: Dilantin chewable 50 mg tablets. Recommended oral dose for a child is 5 – 7 mg/kg/day in divided doses every 12 hrs. a.) What is the child’s weight in kilograms? Round to nearest tenth. Enter numeric value only. b.) Is this a safe dose? YES or NO c.) If yes, how much would the nurse give? Round to nearest tenth. Enter numeric value only. - Answer for A: 30 - Answer for B: yes - Answer for C: 1.5

Question 20: Order: Amantadine 5 mg/kg/day in 3 divided doses. Supply: bottle labeled 50 mg/5 mL. Child's weight is 35 lb. What is the quantity to administer per dose? Round to the nearest tenths. Enter numeric value only. Step 1: convert 35 lbs. to kg. So, 35 lbs. / 2.2 = 15.9 kg Step 2: 5 mg x 15.9 kg = 79.5 Step 3: 79.5 / 50 = 1.59 Step 4: 1.59 / 5 mL = 7.95 but it needs to be divided into 3 doses Step 5: 7.95 / 3 = 2.65 rounded to the nearest tenth is 2.7 Therefore, answer is 2.7 per dose

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

Dosage Calc Practice Exam Questions

Related Documents