Math - Quia



Math

Drop Rate

1. Order: 750 mL of D5W over 3 hours

Drop factor: 20gtt/mL

Calculate the drip rate:

Round your answer to the nearest whole number.

Answer: 83gtt/min

2. Order: Ancef 1 gram in 100ml. Infuse over 45 minutes

Drop factor: 20gtt/ml

Calculate drip rate:

Round your answer to the whole number.

Answer: 44 gtt/min

Mcg/kg/min

1. You need to start a Dobutamine infusion. The floor stock of Dobutamine is 500mg in 250mL of D5W. What would the infusion rate (pump rate) be if the order is for 5.5mcg/kg/min and the patient weighs 121 pounds?

Answer: 9.075 ml/hr

2. You have the order to start a Nipride infusion for hypertension. The infusion needs to begin at 2.5mg/kg/min using the supply of 500mg of Nipride in 250cc of D5W. You note the patient’s admission weight is 225pounds. What would you program the pump to infuse at?

Typo: suppose to be 500mg in 250 cc

Answer: 127.84ml/hr

BSA

1. Order: Zovirax (acyclovir) 250mg/m² IV q8h

Supply: Zovirax 50mg/mL

BSA: 0.50m²

Determine the amount (in mL) to be given for the dose ordered.

Answer: 2.5 ml

2. Order: Methotrexate 3.3mg/m² po daily

Supply: Methotrexate 5mg/2mL

BSA: 1.25m²

Literature: Max dose: 15mg per week

Is the dose ordered safe?

Answer: Total dose for the week is 28.875 , no the dose is not safe!

Pump rate

1. What will the setting be on the pump be if the infusion amount ordered of Drug Z (40 mL) needs to be completed over 25 mins?

Answer: 96 ml/hr

2. What will the setting be on the pump be if the infusion amount orders of Amiodorone (50mL) needs to be completed over 10 minutes?

Answer: 300ml/hr

Kg/mg

1. Order: Tylenol 10mg/kg oral q 4 hour prn

Supply: 165mg/5mL

Weight: 45 kg

Determine the amount (in mL) to be given for the dose ordered

Answer: 13.63 ml

2. Order: Augmentin 150 mg po q8h prn

Supply: 125mg/5mL

Weight: 22lb

Literature: Recommended dose range 30-50mg/kg/day in divided doses. What is the recommended dose range for this patient?

Answer: 300 mg to 500mg per day

Teaspoon

The physician instructed Bob to take 2 tablespoons syrup every 12 hrs. Bob only has teaspoons available to measure with. How many teaspoons should he take per dose?

Answer: 6 teaspoon

Minimal Dilution

Order: Fortaz 1.25gram IVPB q8h in 30cc of D5½NS. Infuse over 30 minutes: Supply: 2grams/10cc: Child weight: 15 kg

Literature: Safe dose is 2 to 6 g/24hours given q8 to12 hours. Literature also states that the Minimal concentration for IV infusion is 45mg/mL.

1. What is the minimal safe dilution for the above ordered dose? (what is the minimal amount of dilutant for the 1.25grams of Fortaz ordered) (Round your answer to a whole number)

Answer: 28ml

Order: Methicillin sodium 830 mg in 30mL of normal saline, IV q6h, infuse over 1 hour

Supply: Methicillin 1gram/10mL

Child weight: 42lb

Literature: Maximum dose is 200mg/kg/day in 4 equally divided doses. It also states that the minimal concentration for IV infusion is 40mg/mL

a) What is the minimal safe dilution (minimal amount of fluid to dilute the 830mg) for the dosage ordered?

Answer: 20.75 ml

Safe Dose

1. Order: Fortaz 1.25gram IVPB q8h in 30cc of D5½NS. Infuse over 30 minutes: Supply: 2grams/10cc: Child weight: 15 kg

Literature: Safe dose is 2 to 6 g/24hours given q8 to12 hours. Literature also states that the Minimal concentration for IV infusion is 45mg/mL.

Is this dose safe?

Answer: Yes (total dose for the above order is 3.75mg per day

2. Order: Keflex 125 mg p.o. q6h

Supply: Keflex 250mg/5mL

Child weight: 44lb

Literature: Children usual maximum dose: 25mg/kg/day

a) Determine if the order is a safe dose

Answer: Yes

Mg/mL

1. Order: Solumedrol 80 mg IV bid

Supply: Solumedrol 125mg/2mL

How many mL would you need to draw up per dose be?

Answer: 0.64ml

2. Methicillin sodium 1.5 gram, IM was prescribed for a systemic infection. 5 grams of the medication is available as a powder in a vial. Directions stated to reconstitute it with 4.9 mL of sterile water for injection and shake well. After the reconstitution the solution concentration of the vial will provide 450mg/mL. How much (mL’s) should the nurse draw up in order to give the prescribed dose?

Answer: 3.33ml

Grain

1. Label: Codeine gr ¼ per tablet

Order: Codeine 30mg p.o. q4 hours prn

How many tablet(s) would you give?

Answer: 2 tablets

2. 650 mg of Tylenol = answer gr X

%

1

Order: Lidocaine 50 mg injection stat

Label: 2% Lidocaine multiple dose vial

Draw a line at the correct amount on the syringe below

Answer 2.5 ml

[pic]

Order: Magnesium Sulfate 2grams: add 1000cc of normal saline infuse over 10 hours. How much Magnesium Sulfate would you need to draw up to mix with the normal saline?

Label: Magnesium Sulfate 50% vial

Draw a line at the correct amount on the syringe below

Answer: 4 ml

[pic]

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