Clinical Calculations

Order: Glucophage 0.5 g PO Label: Glucophage (metformin hydrochloride) 500 mg per tab How many tablets should be administered?

1 tab

Prescription: abacavir 400 mg PO every day Label: abacavir 300mg/tablet How many tablets will you give?

1 tab

Prescription: amoxicillin 650 mg PO Label: amoxicillin 500mg/tablet How many tablets will you give?

1 tab

Prescription: tolazamide 350 mg PO every AM AC for type 2 diabetes mellitus Label: tolazamide 250 mg tablets How many tablets will you give?

1 tab

Order tobramycin sulfate 75 mg IV q.8h Supply: tobramycin sulfate 40mg/mL Give: _____________mL

1.9 mL

Order: Lanoxin 0.125 mg PO Label: Lanoxin (digoxin) 0.25 mg per tab How many tablets should be given?

1/2 tabs

Order: Dynapen Oral Suspension 125 mg PO Label: Dynapen (dicloxacillin sodium) Oral Suspension 62.5 mg per 5ml How many ml should be administered?

10 mL

1 cm = ? mm

10 mm

3. Your client has a prescription for Zosyn 3.375 g in 250 mL NS IV over 2.5 hours four times daily. What flow rate in mL/hr will you set on the IV pump?

100 ml/hr

1 kg = ? grams

1000 grams

1 L = ___ mL

1000 mL

1 mg = ___ mcg

1000 mcg

1 g = ___ mg

1000 mg

20. A nurse is administering medication in 1000 mL NS IV to a client by gravity using a rate of 30 gtts/min. The IV tubing has a drop factor of 20 gtts/mL. What is the infusion time for the IV fluid in hours and minutes?

11 hours 7 minutes

14. Your client has a prescription for tranexamic acid 2 mg/kg/hour IV. The client weighs 250 lbs. You have on hand tranexamic acid 5,000 mg in 250 mL LR.

11.4 ml per hour

5. A hospitalized client on the critical care unit has a new prescription for sotalol 150 mg IV in 500 mL D5W over 4.5 hours by micropump. What flow rate in mL/hr will the nurse set on the IV pump? The drop factor of the IV tubing is 60 gtts/mL. What flow rate in gtts/min would you use for a gravity infusion?

111 gtt/min

Prescription: NPH human insulin 20 units SQ every AM for type 1 diabetes mellitus Label: NPH human insulin 100 units per mL. How many mL will you give?

0.2 ml

Order: Diazepam 2 mg IM Label: Diazepam 5mg/1ml How many ml need to be given?

0.4 ml

You are to give Penicillin G 40,000 units IM. The medication comes as dry powder with 1,000,000 units. You are to add 10 ml sterile water for injection. Once the diluent has been added, the concentration is 100,000 units per ml. How many ml do you need to give?

0.4ml

For tablets, if tablet comes out to more or less than __________ you must round.

0.5 (half)

Order: Vistaril 25 mg IM Label: Vistaril 100 mg per 2 ml How many ml should you give?

0.5 ml

Prescription: carbenocillin 225 mg IM Label: carbenocillin 800 mg in dry powder form. Add 2.5 mL of normal saline to yield 400 mg/mL How many mL will you give?

0.56ml

You are to give 250 mg of cefazolin IM every 8 hours. The medication is available as a powder in a 1 gram vial. Labeled Directions: Reconstitute by adding 2.5 mL of sterile water for injection. Shake well until dissolved. Solution concentration will equal 330 mg per mL. How many mL will you give each dose?

0.76ml

Order: Terramycin 100 mg IM Label: Terramycin (oxytetracycline) 250 mg per 2 ml How many ml will need to be administered?

0.8 ml

Prescription: lithium carbonate 250 mg PO four times a day Label: lithium carbonate 300 mg capsules How many capsules will you give each dose?

1 cap

Order: Digoxin 0.25 mg IM Label: Digoxin 500 mcg per 2 ml How many ml should you give?

1 ml

Order: Claritin 0.01 g PO Label: Claritin (loratadine) 10 mg per tab How many tablets should be given?

1 tab

Order: Unasyn 0.5 g IM Label: Unasyn 1.5 g dry powder. Reconstitute with 3.2 ml sterile water for injection to yield 1.5 g per 4 ml.

1.3 ml

Prescription: methylprednisolone sodium succinate 80 mg IVP every 4 hours for inflammation Label: methylprednisolone sodium succinate 125mg per 2mL How many mL will you give each dose?

1.3ml

Order: Nebcin 55 mg IM Label: Nebcin 80 mg per 2 ml How many ml should be given?

1.4 ml

The order is for Cefizox 400 mg IM. The label says Cefizox 500mg dry powder. Reconstitution: Add 1.5 ml sterile diluent to yield 280 mg per ml. How many ml do you need to give?

1.4ml

The healthcare provider prescribes ciprofloxacin hydrochloride 750mg PO every 12 hours for a bacterial infection. The medication comes in 500 mg tablets. How many tablets will you give?

1.5 tabs

Your client has a prescription for trimethoprim 900 mg orally daily in 3 divided doses for 21 days. The client's weight is 140 lbs. Drug information: 10-15 mg/kg/day orally in 3 divided doses for 21 days. Tablets of 200 mg each are on hand. The tablets can be split

1.5 tabs

Prescription: lincomycin 460 mg every 8 hours IV Label: lincomycin 300mg/mL How many mL will you give each dose?

1.5ml

Your client has a new prescription for 1/2NS 1000 mL IV to infuse over 9 hours. Your client has another new prescription for norepinephrine 10 mcg/min to be given in 750 mL NS over 6 hours by micropump. You are to add 360 mcg of norepinephrine to the 750 mL of NS. What flow rates in mL/hr will the nurse set on the IV pumps?

111 ml/hr

9. A client has a prescription for a Lactated Ringers IV continuous infusion. Remaining in the bag is 800 mL to be given over 7 hours. The client also has a prescription for vasopressin 0.03 units/minute in 500 mL NS. You will add 5.4 units of vasopressin to the NS and run it by micropump over 3 hours. What flow rates in mL/hr will you set on the IV pumps?

114 ml/hr

Your client has a prescription for 1000 mL NS IV. You will need to use the gravity method of infusion. Your IV tubing set has a drop factor of 15 gtts/mL. You will use an infusion rate of 20 gtts/min. What is the infusion time for the IV fluid in hours and minutes?

12 hr 30 min

4. Your client has a prescription for vasopressin 14.4 units IV in 750 mL NS over 6 hours using a micropump. What flow rate in mL/hr will you set on the IV pump? The drop factor for the tubing is 60 gtts/mL. What flow rate in gtts/min would you use for a gravity infusion?

125 gtt/min

1. A nurse working on a hospital medical unit has a client on IV fluids. The healthcare provider has written a new prescription for 1500 mL D5W IV over 12 hours. What flow rate in mL/hr will the nurse set on the IV pump?

125 ml/hr

16. A nurse is administering voriconazole to a client who weighs 130 lbs. The prescription is voriconazole 200 mg IV in 250 mL NS over 2 hours; repeat every 12 hours. Drug information: safe dose range 3-4 mg/kg IV every 12 hours.

125 ml/hr

17. A client who weighs 115 lbs has a new prescription for cidofovir. The prescription is cidofovir 250 mg IV in 500 mL D5W over 4 hours. Repeat in one week. Drug information: safe dose range 4-5 mg/kg IV every week for 2 weeks.

125 ml/hr

8. You are starting a new bag of D5W 1000 mL IV to run over 8 hours. The client receiving D5W has a new prescription for fentanyl 75 mcg X 1 IV in 250 mL NS to run over 1.5 hours by micropump. What flow rates in mL/hr will the nurse set on the IV pumps?

125 ml/hr

A nurse is working with a client on an intensive care unit. The healthcare provider has written a new prescription for nicardipine 25 mg to be delivered in 500 mL NS IV over 5 hours by micropump. The client has another order for continuous infusion of LR 1000 mL IV over 8 hours. What flow rates in mL/hr will the nurse set on the IV pumps?

125 ml/hr

Your client has a prescription for 1000 mL LR IV over 8 hours. What flow rate in mL/hr will you set on the IV pump?

125 ml/hr

A client has a prescription for D5 ½ NS 1000 mL by continuous infusion over 10 hours. Three hours have elapsed. Remaining in the bag are 900 mL. The client also has a prescription for neosynephrine 0.5 mg IV every 10 minutes, with a maximum dose of 5 mg. You will add neosynephrine 5 mg to 250 mL LR and deliver the medication by micropump over 110 minutes. What flow rates in mL/hr will you set on the IV pumps

129 ml/hr

11. A client has a prescription for pentobarbital 2 mg/kg/hour IV. You have available 1,500 mg of pentobarbital in 125 mL NS. The client's weight is 180 lbs.

13.5 ml per hour

The healthcare provider prescribes mezlocillin 1300 mg every 4 hours IV for infection. The pharmacy sends a vial of dry powder labeled mezlocillin 1 g. The information on the label indicates to reconstitute the 1 g of medication with 10 mL of sterile water for injection. The resulting solution will have a concentration of 1 g/10 mL. How many mL will you draw from the vial?

13ml

15. Your client has a prescription for 1000 mL NS IV. You will need to use the gravity method of infusion. Your IV tubing set has a drop factor of 20 gtts/mL. You will use an infusion rate of 20 gtts/min. What is the infusion time for the IV fluid in hours and minutes?

16 hours 40 mins

1 pt = ? ounces

16 ounces

1 lb = ? oz

16 oz

2. A hospitalized client has a new prescription for 500 mL NS IV over 3 hours. What flow rate in mL/hr will the nurse set on the IV pump?

167 ml/hr

13. Your client has a prescription for dobutamine 2 mcg/kg/min IV. The client weighs 130 lbs. The pharmacy has sent you dobutamine 100,000 mcg in 250 mL of D5W.

17.7 ml per hour

Prescription: carboprost tromethamine 0.25mg IM Label: carboprost tromethamine 250 mcg/mL How many mL will you give?

1ml

Prescription: trimethobenzamide HCl 200 mg PO for nausea Label: trimethobenzamide HCl 100 mg per capsule How many capsules will you give?

2 caps

1 qt = ? pt

2 pt

1 oz = ? tablespoons

2 tablespoons

1 kg = ___ lbs

2.2 lbs

Order: Mezlin 0.6 g IM Label: Mezlin (mezlocillin) 1 g dry powder Reconstitution: Add 4 ml sterile water for injection to yield 250 mg per ml.

2.4ml

1 inch = ? cm

2.5 cm

Prescription: amoxicillin/clavulanate potassium 500 mg PO every 8 hours Label: amoxicillin/clavulanate potassium 125mg/5mL How many mL will you give each dose?

20ml

You have a prescription to give cefpodoxime proxetil 200 mg every 12 hours. What you have on hand is cefpodoxime proxetil oral suspension 50 mg per 5 mL. How many mL will you give?

20ml

8. The IV tubing for your client in problem 7 is now 4 days old and must be changed according to your hospital's procedures. Your new IV set has a drop factor of 10 gtts/mL. You are starting a new bag of NS 1000 mL. What is your flow rate in gtts/min?

21 gtt/min

14. A client has a prescription for LR 500 mL IV to be delivered at the rate of 75 mL per hour. The drop factor of your IV set is 20 gtts/mL. What is your flow rate in gtts/min?

25 gtt/min

23. A client is receiving 750 mL NS IV containing an antibiotic. The fluid is to infuse over 6 hours. The drop factor of your IV set is 10 gtts/mL. What is the initial flow rate of the IV fluid? You reassess the IV fluid after 2 hours and find 600 mL remaining in the bag. What would be the adjusted flow rate for the fluid in gtts/min?

25gtt/min

22. Your client is receiving 1000 mL NS IV over 8 hours. The drop factor of your IV set is 15 gtts/mL. What is the initial flow rate of the IV fluid? You reassess the IV fluid after 2 hours and find 700 mL remaining in the bag. What would be the adjusted flow rate for the fluid in gtts/min?

29 gtt/min

Order: Diucardin 0.15 g PO Label: Diucardin (hydroflumethiazide) 50 mg per tab How many tablets should be given?

3 tabs

1 tbsp = teaspoons?

3 teaspoons

1 oz = ? mL

30 mL

20. Your client has a prescription for prednisone 25 mg PO daily for 10 days. The client's weight is 75 kg. Drug information: safe dose 0.4-0.5 mg/kg/day PO X 5-10 days. Tablets are available in 1, 2.5, 5, 10 and 20 mg. The tablets can be split.

30 mg

Prescription: lactulose 20 g PO Label: lactulose 10 g per 15 mL How many mL will you give?

30ml

12. A client has a prescription for LR 1000 mL IV to be delivered at the rate of 125 mL per hour. The drop factor of your IV set is 15 gtts/mL. What is your flow rate in gtts/min?

31 gtt/min

1 qt = _______ ounces

32

13. A client has a prescription for D5W 300 mL IV to be delivered at the rate of 100 mL per hour. The drop factor of your IV set is 20 gtts/mL. What is your flow rate in gtts/min?

33 gtt/min

24. Your client is receiving 1000 mL LR IV over 8 hours. The drop factor of your IV set is 20 gtts/mL. What is the initial flow rate of the IV fluid? You reassess the IV fluid after 2 hours and find 625 mL remaining in the bag. What would be the adjusted flow rate for the fluid in gtts/min? A

35 gtt/min

A nurse is administering medication in 500 mL NS IV to a client by gravity using a rate of 35 gtts/min. The IV tubing has a drop factor of 20 gtts/mL. What is the infusion time for the IV fluid in hours and minutes?

4 hours 46 min

7. Your adult medical client has a new prescription for NS 1000 mL IV to infuse over 8 hours. The drop factor of your IV set is 20 gtts/mL. What is your flow rate in gtts/min?

42 gtt/min

A client has a prescription for Solu-Medrol (methylprednisolone sodium succinate) 0.75 mg/kg IV over 40 minutes in 250 mL of ½ NS, to repeat every 6 hours. The client's weight is 155 lbs. Solu-Medrol is supplied as 400 mg per vial. Each vial measures 4 mL after reconstitution. Inject the entire vial into the 250 mL of ½ NS.

48.8 ml per hour

You have a prescription to give 40 mg of furosemide PO every 8 hours for congestive heart failure. The pharmacy sends up an oral solution of furosemide that contains 10 mg per mL. How many mL will you give each dose?

4ml

1 tsp = ? mL

5 mL (cc)

Prescription: ampicillin 2,000 mg IV every 4 hours for infection Label: ampicillin 1.5 g vial of dry powder Instructions: Reconstitute each ampicillin 1.5 g vial with 4 mL of sterile water to yield 375 mg/mL How many mL will you draw from the vial after reconstitution?

5.3ml

15. Your client has a prescription for propofol 5 mcg/kg/min IV. The client weighs 170 lbs. You have on hand propofol 1,000 mg in 250 mL D5W.

5.8 ml per hour

A client is receiving 500 mL NS IV containing an antibiotic. The fluid is to infuse over 3 hours. The drop factor of your IV set is 15 gtts/ml. What is the initial flow rate of the IV fluid? You reassess the IV fluid after 1 hour and find 400 mL remaining in the bag. What would be the adjusted flow rate for the fluid in gtts/min?

50 gtt/min

19. Your client has a prescription for minocycline hydrochloride ER tablets 135 mg PO daily for 12 weeks. Your client weighs 115 lb. Drug information: safe dose range is 1-2 mg/kg for ER tab PO daily for 12 weeks. Do not split, chew or crush these tablets. You have on hand minocycline HCl ER tabs in 50, 60 and 75 mg.

52.3 mg

21. A client is receiving 1000 mL D5W IV over 8 hours. The IV tubing drop factor is 20 gtts/mL. What is the initial flow rate in gtts/min? The nurse reassesses the IV fluid after 3 hours and finds that 800 mL remain in the bag. What would be the adjusted flow rate for the fluid in gtts/min?

53 gtt/min

9. A client has a new prescription for D5W 1000 mL IV to be given over 6 hours. The drop factor of your IV set is 20 gtts/mL. What is your flow rate in gtts/min?

56 gtt/min

The healthcare provider has prescribed mycostatin oral suspension 500,000 units swish-andswallow for oral thrush. The mycostatin you have on hand contains 100,000units/mL. How many mL will you give?

5ml

10. A client has a prescription for 500 mL of NS to be given over 2 hours to deliver a medication. The drop factor of your IV set is 15 gtts/mL. What is your flow rate in gtts/min?

63 gtt/min

11. A client has a prescription for 250 mL of NS to be given over 1 hour to deliver a medication. The drop factor of your IV set is 15 gtts/mL. What is your flow rate in gtts/min?

63 gtt/min

A nurse is administering medication in 1000 mL LR IV to a client by gravity using a rate of 20 gtts/min. The IV tubing has a drop factor of 10 gtts/mL. What is the infusion time for the IV fluid in hours and minutes?

8 hours 20 minutes

1 cup = ___ oz

8 oz

Prescription: meperidine 85 mg PO every 4 hours Label: meperidine syrup 50 mg per 5 mL How many mL will you give each dose?

8.5ml

1. A nurse working on a hospital critical care unit has a client on IV fluids. The healthcare provider has written a new prescription for amiodarone 360 mg over six hours on a microdrip pump. Amiodarone 360 mg is contained in 500 mL NS. The drop factor for the IV tubing is 60 gtts/mL. What flow rate in mL/hr will the nurse set on the IV pump? What flow rate in gtts/min would the nurse use for a gravity infusion?

83 gtt/min

3. Your client has a prescription for norepinephrine 360 mcg in 250 mL LR over 3 hours using a micropump. What flow rate in mL/hr will you set on the IV pump? The drop factor for the IV tubing is 60 gtts/mL. What flow rate in gtts/min would you use for a gravity infusion?

83 gtt/min

5. A hospitalized client has a new prescription for 2000 mL NS IV over 24 hours. What flow rate in mL/hr will the nurse set on the IV pump?

83 ml/hr

A nurse working on a hospital medical unit has a client on IV fluids. The healthcare provider has written a new prescription for moxifloxacin 400 mg in 1000 mL D5W IV over 9 hours daily for 14 days. What flow rate in mL/hr will the nurse set on the IV pump?

9 hours

A nurse is administering 1500 mL D5W IV to a client by gravity using a rate of 40 gtts/min. The IV tubing has a drop factor of 15 gtts/mL. What is the infusion time for the IV fluid in hours and minutes?

9 hours 23 min

2. A hospitalized client has a new prescription for 750 mL D5W IV via microdrip pump over 8 hours. The D5W contains isoproterenol 480 mcg. What flow rate in mL/hr will the nurse set on the IV pump? The drop factor for the IV tubing is 60 gtts/mL. What flow rate in gtts/min would the nurse use for a gravity infusion?

93 gtt/min

If IV fluids are being administered by gravity (drops per minute), the number of drops must be expressed as ____________?

A whole number (34.5 = 35gtts/min)

Medication dosage per kg

Amount ordered x # of kg (0.25 g x 20kg = 5)

Food interactions of anticoagulants?

Avoid large amounts of caffeine. Do not change normal intake of Vitamin K Rich Food

To convert pound to kg you?

Divide weight by 2.2

Capsules cannot be?

Divided

Dropper usage rules.

Do not interchange between meds or use one that did not come with medication.

If answer is less than one round to?

Hundredths position (0.02)

IV fluids administered by an infusion pump is expressed as a whole number unless what?

In a critical care setting, then you round to the tenths position.

What can you use as oral syringe?

Injection syringe with needle removed.

Always included

Leading zero (0.2)

Information needed to calculate dosage.

Ordered amount, what is on hand, route

What tube goes through abdominal wall into stomach?

PEG

Meds given through what tube must be liquid form?

PEJ

What feeding tube goes through abdominal wall into jejunum portion of small intestine?

PEJ

Do not ___________ until the end of the problem?

Round

equipment used for parenteral administration

Syringes, vials, ampules

When calculating how long IV fluids will take you infuse, you must do what to get the correct hours and minutes?

Take the decimal out 3 places (4.462 hours where 0.462 x 60 = 27.72 = 28 min = 4 hrs 28 mins

Do not included?

Trailing zeros (2 not 2.0)

If answer is greater than 1

round to 1 decimal place ex: 6.75 becomes 6.8

dimensional analysis

supply/have x desired dose