Pharmacology Critical care
The healthcare provider prescribes a heparin infusion for the patient at 30 mL/hr. Available is 30,000 units of heparin with a concentration of 1,000 mL of D5W. Based on this, the patient will receive units/hr.
900 Use dimensional analysis to calculate the infusion rate (units/hr):X units/hr = 30,000 units1,000 mL × 30 mL1 hrX units/hr = 900,000 units1,000 hrX units/hr = 900 units/hr
The healthcare provider prescribes 900 mg of amiodarone in 500 mL D5W to infuse at 0.5 mg/min. Based on this, the patient will receive __ mL/hr.
16.7 1. Calculate the medication dose per milliliter of solution.X = 900 mg500 mLX =1.8 mg/mL2. Calculate the number of milliliters per minute that delivers the ordered dosage.X = 0.5 mg/min1.8 mg/mLX =0.28 mL/minTo calculate the number of milliliters per hours, multiply by 60 minutes/hour:X = 0.28 mL 1 min × 60 min1 hr =16.7 mL/hr
Which three variables must be considered when calculating the rate of infusion of a critical care medication?
Volume to be administered Concentration of medication Unit of time over which the volume is to be infused
The healthcare provider prescribes 20 units/kg/hr of heparin for a patient who weighs 132 lb. The patient will receive units/hr.
1200 1. Calculate the patient's weight in kilograms. Use the conversion factor 1 kg = 2.2 lb.132 lb2.2 lb/kg=60 kg2. Calculate the heparin dosage.60 kg × 20 units/kg/hr =1,200 units/hr
The healthcare provider prescribes heparin IV at 10 units/kg/hr for a patient weighing 165 lb. The available concentration is 12,500 units in 250 mL of D5W. The patient will receive __ mL/hr.
15 1. Calculate the patient's weight in kilograms. Use the conversion factor 1 kg = 2.2 lb.165 lb2.2 lb/kg=75 kg 2. Calculate the rate for the continuous infusion.10 units/kg × 75 kg =750 units/hr of heparin 3. Determine the flow rate (in milliliters per hour) to use with the infusion device.250 mL12,500 units = X mL750 units187,500 = 12,500XX = 187,50012,500=15 mL/hr
The healthcare provider prescribes 400 mcg of Precedex in 100 mL of normal saline (NS) to infuse at 18 mcg/hr. Based on this, the nurse should set the infusion pump for mL/hr.
4.5 1. Calculate the medication dose per milliliter of solution.X = 400 mcg100 mLX =4 mcg/mL2. Calculate the number of milliliters per hour that delivers the ordered dosage.X = 18 mcg/hr4 mcg/mLX =4.5 mL/h
The healthcare provider prescribes dopamine 400 mg in 250 mL D5W at 5 mcg/kg/min. The patient's current weight is 220 lb. Based on this, the patient should receive __ mL/hr (rounded to the nearest tenth).
18.8 1. Calculate the concentration of medication in 1 mL of solution.X = 400 mg250 mL =1.6 mg/mL 2. Convert milligram to micrograms. Use the conversion factor 1 mg = 1,000 mcg.2. Convert milligram to micrograms. Use the conversion factor 1 mg = 1,000 mcg.1.6 × 1,000 = 1,600 X = 1,600 mg/mL 3. Convert the patient's weight to kilograms. Use the conversion factor 2.2 lb = 1 kg.220 lb2.2 lb/kg= 100 kg 4. Calculate the concentration per minute:100 kg × 5 mcg/kg/min= 500 mcg/min 5. Divide the concentration per minute by the concentration of the solution.500 mcg/min1,600 mcg/mL = 0.312 mL/min6. Convert milliliters per minute to milliliters per hour. Use the conversion factor 60 minutes = 1 hour.0.312 mL 1 min × 60 min 1hr= 18.75=18.8 mL/hr(rounded up to the nearest tenth)
A patient weighing 154 lb is prescribed a critical care medication, 375 mg in 250 mL D5W at 5 mcg/kg/min. The infusion pump should be set at mL/hr (rounded to the nearest whole number). Use numbers only.
14 1. Calculate the concentration of medication in 1 mL of solution:375 mg250 mL= 1.5 mg/mL 2. Convert milligrams to micrograms: 1.5 mg = 1,500 mcg 3. Convert the patient's weight to kilograms. Use the conversion factor of 2.2 lb = 1 kg.154 lb2.2 lb/kg= 70 kg 4. Calculate the concentration per minute:70 kg × 5 mcg/kg/min= 350 mcg/min 5. Divide the concentration per minute by the concentration of the solution:350 mcg/min1,500 mcg/mL = 0.233 mL/min 6. Convert milliliters per minute to milliliters per hour. Use the conversion factor 60 minutes = 1 hour.0.233 mL 1 min × 60 min 1hr= 13.98=14 mL/hr(rounded up to the nearest whole number)
A patient weighing 165 lb is prescribed a critical care medication, 250 mg in 300 mL D5W at 3 mcg/kg/min. The electronic infusion pump should be set at __ mL/hr.
16.2 1. Calculate the concentration of medication in 1 mL of solution.X = 250 mg300 mL =0.833 mg/mL 2. Convert milligram to micrograms: 0.833 mg = 833 mcg 3. Convert the patient's weight to kilograms. Use the conversion factor of 2.2 lb = 1 kg.165 lb2.2 lb/kg= 75 kg 4. Calculate the concentration per minute:75 kg × 3 mcg/kg/min= 225 mcg/min 5. Divide the concentration per minute by the concentration of the solution.225 mcg/min833 mcg/mL = 0.27 mL/min 6. Convert milliliters per minute to milliliters per hour. Use the conversion factor 60 minutes = 1 hour.0.27 mL 1 min × 60 min 1hr= 16.2 mL/hr
The medication order is for Lidocaine 8 mg in 250 mL, to infuse at 10 mcg/min. Based on this, the nurse has to infuse at the rate of mL/hr (rounded to the nearest tenth).
18.8 1. Calculate the medication dose per milliliter of solution.X = 8 mg250 mLX =0.032 mg/mLConvert mg to mcg: 0.032 mg = 32 mcg2. Calculate the number of milliliters per minute that delivers the ordered dosage.X = 10 mcg/min32 mcg/mLX =0.312 mL/minTo calculate the number of milliliters per hour, multiply by 60 minutes/hour:X =0.312 mL/min×60 min/hr = 18.72 = 18.8 mL/hr (rounded up to the nearest tenth)
A 220-lb patient is prescribed a critical care medication, 300 mg in 500 mL D5W at 5 mcg/kg/min. The electronic infusion pump should be set at __ mL/hr (rounded to the nearest whole number).
50 1. Calculate the concentration of medication in 1 mL of solution.X = 300 mg500 mL =0.6 mg/mL 2. Convert milligram to micrograms. Use the conversion factor 1 mg = 1,000 mcg.0.6 mg/mL × 1000 mcg=X mcg/mL0.6 × 1000 = XX=600 mcg/mL 3. Convert the patient's weight to kilograms. Use the conversion factor of 2.2 lb = 1 kg220 lb2.2 lb/kg= 100 kg 4. Calculate the concentration per minute:100 kg × 5 mcg/kg/min=500 mcg/min 5. Divide the concentration per minute by the concentration of the solution.500 mcg/min600 mcg/mL = 0.833 mL/min 6. Convert milliliters per minute to milliliters per hour. Use the conversion factor 60 minutes = 1 hour.0.833 mL 1 min × 60 min 1hr= 49.98=50 mL/hr(rounded up to the nearest whole number)
The healthcare provider prescribes 50 mL of heparin each hour. Available is 1,000 mL with 10,000 units of heparin added. Based on this, the patient will receive __ units/hr.
500 1. Calculate the infusion rate. X units/hr = 10,000 units1,000 mL × 50 mL1 hrX units/hr = 500,000 units1,000 hrX units/hr = 500 units/hr
The healthcare provider prescribes 30 units of regular insulin per hour of IV. Available is 130 units of regular insulin in 250 mL NS. The patient will receive mL/hr (rounded to the nearest tenth
57.7 1. Calculate the infusion rate (units/mL).X = 130 units250 mLX =0.52 units/mL2. Calculate the number of milliliters per hour that delivers the ordered dosage.X = 30 units/hr0.52 units/mLX = 57.69=57.7 mL/hr (rounded up to the nearest
The healthcare provider prescribes 800 units of heparin per hour. The concentration that is available is 40,000 units per 1,000 mL of D5NS. If this heparin is infused using an intravenous pump, the flow rate would be mL/hr.
20 Use dimensional analysis to calculate the flow rate (mL/hr):X mL/hr = 1,000 mL40,000 units × 800 units1 hrX mL/hr = 1,000 mL40,000 units ×800units1 hrX mL/hr =800,000 mL40,000 hrX mL/hr =20 mL/hr
The healthcare provider prescribes 1,000 units of heparin per hour. Available is 12,500 units of heparin per 250 mL in D5W. The patient will receive __ mL/hr.
20 1. Calculate the flow rate.X mL/hr = 250 mL12,500 units × 1,000 units1 hrX mL/hr = 250 mL12,500 units × 1,000 units1 hrX mL/hr = 250,000 mL12,500 hrX mL/hr = 20 mL/hr
The nurse is providing care to a patient who is prescribed 10 units of regular insulin per hour by intravenous infusion. The concentration of insulin that is available is 125 units per 250 mL of NS. Based on this, the patient will receive __ mL/hr.
20 1. Calculate the insulin dose per milliliter of solution.X = 125 units250 mLX =0.5 units/mL 2. Calculate the number of milliliters per hour that delivers the ordered dosage.10 units1 hr = X mL0.5 unitsTo solve for "X", the units label cancels and X = 10 mL/0.5 hrX=20
The healthcare provider prescribes a critical care medication, 500 mg in 500 mL D5W at 5 mcg/kg/min, for a patient weighing 165 lb. Based on this, the nurse should set the infusion pump at mL/hr.
22.5 1. Calculate the concentration of medication in 1 mL of solution.X = 500 mg500 mL =1 mg/mL 2. Convert milligram to micrograms: 1 mg = 1,000 mcg 3. Convert the patient's weight to kilograms. Use the conversion factor of 2.2 lb = 1 kg.165 lb2.2 lb/kg= 75 kg 4. Calculate the concentration per minute:75 kg × 5 mcg/kg/min= 375 mcg/min 5. Divide the concentration per minute by the concentration of the solution:375 mcg/min1,000 mcg/mL = 0.375 mL/min 6. Convert milliliters per minute to milliliters per hour. Use the conversion factor 60 minutes = 1 hour.0.375 mL 1 min × 60 min 1 hr= 22.5 mL/hr
The healthcare provider orders 1,000 units per hour of heparin. The concentration of the heparin that is available is 20,000 units per 500 mL of D5W. Based on this, the flow rate should be mL/hr.
25 Use dimensional analysis to calculate the flow rate (mL/hr):X mL/hr = 500 mL20,000 units × 1,000 units1 hrX mL/hr = 500 mL20,000 units ×1,000units1 hrX mL/hr =500,000 mL20,000 hrX mL/hr =25 mL/hr
The healthcare provider prescribes 50 mg of a nitroglycerine in 250 mL D5W to infuse at 10 mcg/min for chest pain. The patient will receive __ mL/hr.
3 1. Calculate the medication dose per milliliter of solution.X = 50 mg250 mLX =0.2 mg/mLConvert mg to mcg: 0.2mg = 200 mcg2. Calculate the number of micrograms per minute that delivers the ordered dosage.X = 10 mcg/min200 mcg/mLX =0.05 mL/minTo calculate the number of milliliters per hours, multiply by 60 minutes/hour.X = 0.05 mL 1 min × 60 min1 hr =3 mL/hr
The medication order is for administering a continuous infusion of Lidocaine at 2 mg/min/infusion pump. Available is IV of 500 mL D5W with 2 g Lidocaine added. Based on this, the hourly rate for the infusion pump should be __ mL/hr.
30 1. Calculate the medication dose per milliliter of solution.X = 2 g500 mLX =0.004 g/mLConvert g to mg: 0.004 g = 4 mg2. Calculate the number of milliliters per minute that delivers the ordered dosage.X = 2 mg/min4 mg/mLX =0.5 mL/minTo calculate the number of milliliters per hour, multiply by 60 minutes/hour.X = 0.5 mL 1 min × 60 min1 hr =30 mL/hr
What is calculated first when calculating the infusion rate of a critical care medication in solution on the basis of total dosage per hour?
Dose of medication per mL
A patient who weighs 165 lb is prescribed a critical care medication, 500 mg in 500 mL D5W at 5 mcg/kg/min. Place, in the correct order, the steps for calculating the infusion rate in mL/hr for this patient.
First, calculate the concentration of the medication in 1 mL of solution. Next, convert the patient's weight into kilograms. Once the weight in kilograms is known, calculate the concentration to be infused per minute using the prescriber's order. Then, divide the concentration per minute by the concentration of the solution. Finally, multiply the result (mL/min) by 60 to obtain the hourly rat
