Pediatric, IV & Heparin Calculations

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Order: Augmentin 250 mg PO every 8 hours Supply: Augmentin 125 mg/5mL Weight: 55 lbs SDR: 20 - 40 mg /kg/day divided doses q8hr 1. What is the child weight in kg? 2. What is the SDR? 3. If so, calculate the amount in mL given:

1) 25 kg 2) 500/3= 166.7 mg & 1000/3= 333.3 mg 3) 166.7mg < 250mg > 333.3mg ✔️ Answer: 10 mL

Order: Keflex 250 mg PO every 6 hours Supply: Keflex 0.5 g/ 15mL Weight: 66 lbs SDR: 25 - 50 mg /kg/day in 4 divided doses 1. What is the child weight in kg? 2. What is the SDR? 3. If so, calculate the amount given:

1) 30 kg 2) SDR : 187.5 mg - 375 mg 3) 7.5 mL

Order: Morphine 5mg Sub-q every 6 hr prn Supply: Morphine 4 mg/ mL Weight: 80 lbs SDR: 0.1 - 0.2 mg /kg/dose, not exceed 15mg/ dose. 1. What is the child weight in kg? 2. What is the SDR per dose for this child? 3. If so, calculate the amount given:

1) 36.4 kg 2) 3.6 mg -7.3 mg 3) 1.3 mL

Order: Oxacillin 250 mg PO every 6 hours Supply: Oxacillin 1000 mg/ 20mL Weight: 42 lbs SDR: 50 - 100 mg /kg/day divided doses q6hr 1. What is the child weight in kg? 2. What is the SDR? 3. If so, calculate the amount given:

1) 42 lbs/2.2 = 19.1 kg 2) SDR 238.8 mg - 477.5 mg 3) 5 mL

We round the result to nearest 500 when we calculate for HEPARIN BOLUS. Do you remember how to round nearest 500? 1) 5250 = 2) 5251 = 3) 5750 = 4) 5751 = 5) 6159 =

1) 5250 = 5000 2) 5251 = 5500 3) 5750 = 5500 4) 5751 = 6000 5) 6159 = 6000

Order: Vibramycin 50mg PO every 12 hours Supply: Vibramycin 500 mg/5mL Weight: 30lbs SDR: 2.2 - 4.4mg /kg/day in two divided doses 1. What is the child weight in kg? 2. What is the SDR? 3. If so, calculate the amount given:

1) Weight in kg: 30lbs /2.2 = 13.6 kg 2) SDR 29.9mg /2 = 15 mg & 59.8mg /2 = 30mg 3) 50mg > 30mg , the dose it's not safe!

Infuse 1750 mL over 9 hours Drop factor: 20 gtt /mL Determine the rate in gtt/min _________.

1) calculate total minutes of 9 hours : 9x 60= 540 minutes 2) calculate using the formula: Gtt/min= total volume x drop factor /total minutes; 1750x20/540 = 65 gtt/min.

Order: infuse 1800 ml of NS over 24 hr Determine the IV flow rate in ml/hour

1800/24= 75ml/hour

Infuse 75 mL/hr Drop factor: 60 gtt/ml Determine the rate in gtt/min _______.

75ml x 60 gtt = 4500 / 60 min = 75 gtt/min.

Order: Lactated Ringers at 75 ml/HR Drop factor: 20 gtt/ml Determine the rate in gtt/min _______.

75•20/60 = 25 gtt/min

Order: Heparin 1000 units / hour Supply: 40,000 units Heparin/ 1000 mL D5W. Calculate the rate in mL / hour: _______.

Answer 25mL / hour 1000•1000/40,000 = 25 mL /hr.

Client is to receive an antibiotic in 50 mL of 0.9 % NS over 30 minutes. What rate will the nurse set the IV infusion pump?

Answer : 100 mL/ hour 50 x 60 minutes / 30 minutes = 100 ml / hour.

Order: Heparin 20,000 units / 500 mL D5W to infuse at 28 mL / hour. Calculate the hourly Heparin dosage in units / hour __________.

Answer: 1,120 units/hour Units/hr: 20,000 • 28 / 500= 1,120

Order: NS 3000mL over 24 hr Determine the IV rate if using an infusion pump.

Answer: 125 mL / hour

Order: Heparin drip at 15 units/kg/hour Supply: 25,000 units Heparin in 500 mL NS Weight: 145 lbs Calculate the rate in mL/hr: __________.

Answer: 19.8 mL/hour 1) 145 lbs/ 2.2= 65.9 kg 2) 15 units x 65.9 kg= 988.5 units 3) ml/hr: 500 x 988.5 /25,000 = 19.8 ml/ hr

Order: Heparin drip at 11 mL / hour. Heparin is mixed 50,000 units / 250 mL D5W. Calculate the hourly Heparin dosage in units / hour: __________.

Answer: 2,200 units / hour Units/hour= 50,000 x 11 / 250 = 2,200 units/hr

Order: give Heparin bolus IV push of 40 units/ kg. Weight: 250 lbs How many units will you administer? ___________.

Answer: 4,500 units 1) 250 lbs/2.2= 113.6 kg 2) 40 units x 113.6 kg = 4,544 3) it's Heparin bolus, so round it to nearest 500: 4,544 = 4,500 units

Order: Heparin 900 units / hour Supply: 10,000 units Heparin/ 500 mL 0.45% NS. Calculate the rate in mL per hour:_____.

Answer: 45 mL/ hour 500x900 / 10,000 = 45 mL /hour

D5W is infusing at 55 gtt/min Drop factor: 60 gtt / mL How much fluid volume will the client receive in 10 hours?

Answer: 550 mL We have to find the total volume: 1) convert 10 hours in minutes: 10x60=600 2) x (total vol) • 60 gtt /600 = 55 gtt/min 3) isolate the x: so, x(total vol) = 55•600/60 = 550

Order: Heparin drip at 18 units/ kg / hr Supply: 25,000 units Heparin in 1000 mL D5W Weight: 80 kg Calculate the rate in mL / hour: _________.

Answer: 57.6 mL/ hour 1) 18 units x 80 kg= 1,440 units 2) mL/hr= 1,000 x 1,440 /25,000 = 57.6 ml/ hr

Order: infuse 250 ml of D5W in 3 hours. Determine the IV flow rate in ml/hour

Answer: 83mL / hour

True or false? A nurse can give a patient more than 1 mL per dose of Heparin injection

False. 1 ml is the maximum amount of Heparin injection per dose. (if your Heparin calculation answer is more than 1 ml per dose, you need to review it)

Order: Ampicillin 500 mg q8hr Supply: Ampicillin 500 mg / 100 mL You are to infuse the medication over 30 minutes using the INFUSION PUMP.

Remember: INFUSION PUMP is mL / HR! we have to infuse for 30 minutes: so we multiply the total mL (100) by 60 minutes, then divide by total infusion of 30 minutes . 100x60= 6000/30 = 200 ml/HR

True or False? The average of Heparin flush dosage strength is 10 units / mL and never exceeds 100 units / mL.

True!


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