Math Proficiency
8 oz = __ mL
240 mL
1 L = __ quart
1
The prescriber orders Indocin (indomethacin) 150 mg by mouth daily in 3 divided doses. The drug available is labeled as follows: 25mg per 5 mL How much should the nurse administer per dose?______mL Per day? ______mL How many tsp should the patient receive per dose? _____tsp Per day? _____tsp
10; 30 2; 6
1 tbsp = ___ mL
15
1 gram = ___ grain
15 grain
1 mL = ___ minims (M)^2 = ____ drops (gtts)
15; 15
1 pint = ___ oz
16
6 oz = __ mL
180
1 inch = __ mm
25.4 mm
Injectable medications/Oral/NGT/PEG/J Tube: • For any volume less than 1 mL, round to the nearest ________ • For any volume greater than 1 mL, round to the nearest _________
hundredth; tenth
If a number begins with a decimal point, use a
leading zero
1 mL = __ cc
1
1 cm = ___ mm
10
1 tsp = __ fluidram = ___ mL
1; 5
1 meter = ____ yards
about 1
Half life 1000 mg 8am 62.5 mg 12pm Whats the half life?
1 hour Calculations: 1000/2 500/2 250/2 125/2 Or 62.5 x 2 = 125 125 x 2 = 250 250 x 2 = 500 500 x 2 = 1000
1 kg = _____ grams
1000
1 mg = _____ mcg
1000
1 quart = ____ mL
1000
Order = 0.05mg/kg Q4 Weight =1.48kg Medication = 2mg/1mL mg per dose? 0.07 mg per dose mL per dose? 0.04 mL
0.07; 0.04
The medication label states that each pill contains 150 micrograms of medicine. How many milligrams is this equal to?
0.15mg
A nurse is preparing to administer morphine sulfate 2 mg IV bolus. Available is morphine sulfate 10 mg/mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.) ______ mL
0.2
A nurse is preparing to administer haloperidol 5 mg IM to a client. The amount available is haloperidol 20 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.) ______ mL
0.25
You are ordered to give Tylenol to your patient who weighs 0.56kg Max dosing range per dose is 15mg/kg Label of the medication says 160mg/5mL Max dose you can give?
0.26mL
A nurse is caring for a client who has heart failure and a prescription for digoxin 125 mcg PO daily. Available is digoxin PO 0.25 mg/tablet. How many tablets should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.) ______ tablet(s)
0.5
The prescriber orders Lanoxin 125 mcg IVP q8h times 3 doses. The medication is labeled as follows: LANOXIN 2 mL (digoxin) Injection Rx only 0.5 mg in 2 mL 0.25 mg per mL How many mL should the nurse administer to the patient per dose? ______mL
0.5
The physician orders 400 mg of a medication. The reconstitution directions say to add 7.2 mL of sterile water to yield a concentration of vial read 650 mg/mL. How many mL should the nurse administer to the patient? _____________mL
0.62
A client is to receive enoxaparin 30 mg subcutaneously. Available is enoxaparin 40 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.) ______ mL
0.8
A nurse is preparing to administer hydrocortisone 100 mg IM daily to a client. Available is hydrocortisone 250 mg/2 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth number. Use a leading zero if it applies. Do not use a trailing zero.) ______ mL
0.8
The prescriber orders methadone hydrochloride 8 mg by mouth daily. The medication is labeled as follows: 10 mg per mL Each mL contains methadone hydrochloride 10 mg
0.8
A nurse is preparing to administer vancomycin 500 mg PO daily divided into four equal doses. The amount available is vancomycin 125 mg capsules. How many capsules should the nurse administer with each dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.) ______ capsule(s)
1
The prescriber orders Avelox 0.4 g by mouth twice a day. The medication available is labeled as follows: Equivalent to 400 mg moxifloxacin 30 tablets How many tablets would the nurse administer to the patient for this dose?
1
The physician orders 500 mg of a medication. The reconstitution directions say to add 6.2 mL of sterile water to yield a concentration of 450 mg/mL. What should the nurse administer to the patient? ____________________mL
1.1
A nurse is preparing to administer amoxicillin 500 mg PO four times each day to a client. The amount available is amoxicillin suspension 250 mg/5 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.) ______ mL
10
The label on the medication bottle says to take 2 teaspoons. How many milliliters should be dispensed?
10
1 meter = __ cm
100
1 G = ___ mg
1000
1 L = __ mL
1000
A nurse is caring for a 1-month-old infant who weighs 3500 g and is prescribed a dose of cephazolin 50 mg/kg by intermittent IV bolus three times daily. How many mg should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.) ______ mg
175
A coffee cup contains 6 fluid ounces. How many milliliters should the nurse record on the Intake and Output record?
180
1 ounce (oz) = __ Tbsp
2
A nurse is preparing to administer acetaminophen 650 mg PO every 4 hr PRN to a client. The amount available is acetaminophen 325 mg/tablet. How many tablets should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.) ______ tablet(s)
2
A nurse is preparing to administer chlordiazepoxide 50 mg PO every 8 hr to a client. The amount available is chlordiazepoxide 25 mg/capsule. How many capsules should the nurse administer per dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.) ______ capsule(s)
2
The prescriber orders Lotrel 5 mg/20 mg by mouth once a day for a patient. The drug available is labeled as follows: 2.5/10 100 capsules How many tablets should the nurse administer to the patient per dose? (Tablets are scored.)
2
The prescriber orders Tylenol (acetaminophen) X gr by mouth q4h PRN for headache for the patient. The drug available is labeled as follows: 100 tablets - 325mg each How many tablets should the nurse administer to the patient per dose? (Tablets are scored.)
2
The patient is to receive 2.5 liters of IV fluid in 24 hours. How many milliliters is this equal to?
2,500
1 kg = ___ lbs
2.2
A nurse is preparing to administer hydrochlorothiazide 25 mg PO daily to a client. Available is hydrochlorothiazide 50 mg/5 mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.) ______ mL
2.5
The prescriber orders Kefzol 500 mg IM STAT. The medication label instructs the RN to reconstitute the medication. The instructions read as follows Add 45 mL for a concentration of 1 gram / 5 mL and add 96 mL for a concentration of 1gram/ 10 mL. How many mL should the nurse administer to the patient? (** remember that the max mL that can be administered IM is 3 mL) ______ mL
2.5
1 inch = __ cm
2.54
The prescriber orders Ampicillin 1000 mg IM STAT. The medication label instructs the RN to reconstitute the medication. The instructions read as follows Add 30 mL for a concentration of 750 / 2mL and add 45 mL for a concentration of 500/ 2mL and add 60 mL for a concentration of 250mg/ 2 mL. How many mL should be administered to the patient? ______ mL
2.7
The prescriber orders an IV of D5NS to run at 125 mL an hour. The nurse has IV tubing labeled 10 gtts/mL. How many drops per minute should the nurse regulate the IV? ___________gtt/min
21
The prescriber orders an IV of NS at 25 mL/hr. The nurse chooses "minidrip" or "microdrip" tubing for this IV. What is the drop rate for this IV? __________________
25 gtts/min
1 pint = ___ cups = ___ mL
2; 500
1 tbsp = __ tsp
3
IM medication must be administered at a volume of __mL or less
3
The prescriber orders Diovan 120 mg by mouth once a day for a patient. The drug available is labeled as follows: 40 mg 30 tablets How many tablets should the nurse administer to the patient per dose? (Tablets are scored.)
3
The prescriber orders Pfizerpen 2.5 million units IM Now. The available drug is labeled: For injection - 5 million units Average single dose: 200,000 - 400,000 units mL diluent Units per mL added of solution 18.2 mL 250,000 8.2 mL 500,000 3.2 mL 1,000,000 The nurse chooses how to dilute this medication. How much diluent should the nurse choose to add to the vial? ____________mL
3.2 mL
1 fluid oz = ___ mL
30
1 oz = ___ grams
30
The prescriber orders Ampicillin 1000 mg IM STAT. The medication label instructs the RN to reconstitute the medication. The instructions read as follows Add 30 mL for a concentration of 750 / 2mL and add 45 mL for a concentration of 500/ 2mL and add 60 mL for a concentration of 250mg/ 2 mL. How much diluent should be added? ______ mL
30
The bottle of aspirin says that one tablet equals 5 grains. How many milligrams are in one tablet?
300 (or 325)
A nurse is preparing to infuse a 250-mL unit of packed RBCs over 2 hr. The drop factor of the manual IV tubing is 15 gtts/mL. The nurse should adjust the flow rate to deliver how many drops per minute? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.) ______ gtt/min
31
1 L = __ oz
32
A nurse is preparing to administer a continuous heparin infusion at 1600 units/hr. Available is heparin 25,000 units in dextrose 5% in water (D5W) 500 mL. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.) ______ mL/hr
32
120 mg once a day by mouth 1 tab = 30 mg How many tabs?
4
The prescriber orders Diflucan 0.4 g by mouth once a day for the patient. The drug available is labeled as follows: 30 tablets 100 mg How many tablets should the nurse administer to the patient per dose? (Tablets are scored.)
4
The prescriber orders Tikosyn 0.5 mg by mouth twice a day for the patient. The drug available is labeled as follows: 60 capsules 125 mcg How many capsules should the nurse administer to the patient per dose?
4
A client is prescribed 1 g potassium phosphate IV to be infused continuously over 6 hr. Available is 1 g potassium phosphate in 250 mL dextrose 5% water (D5W). The nurse should set the IV pump to run at how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.) ______ mL/hr
42
A nurse is preparing to administer amoxicillin 30 mg/kg/day divided equally every 12 hr to a toddler who weighs 33 lb. Available is amoxicillin 200 mg/5 mL suspension. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.) ______ mL
5.6
A nurse is caring for a client who is postoperative following an appendectomy and is prescribed D5 lactated Ringer's at 150 mL/hr by continuous IV infusion for 12 hr. The drop factor of the manual IV tubing is 20 gtt/mL. The nurse should set the manual IV infusion to deliver how many gtt/min? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.) ______ gtt/min
50
1 tsp = __ gtts
60
1 grain = ___ mg
60-65 mg
A baby weighs 3.6 kilograms. How many pounds does she weigh?
7.9
A nurse is preparing to administer total parental nutrition (TPN) 1800 mL to infuse over 24 hr. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.) ______ mL/hr
75
1 cup = ___ ozs
8
The patient weighs 185 pounds. How many kilograms does he weigh?
84.1
You are ordered to give Tylenol to your patient who weighs 0.56kg Max dosing range per dose is 15mg/kg per dose q 6h Label of the medication says 160mg/5mL Cannot give more than 40mg/day If you administer the max dose, how many mg will you distribute a day? Is this a safe dose?
Answer = 33.6mg/day so it is a safe dose **If it was Q4hr, would not be safe (50.4mg) **Tylenol PRN every 4-6 hours you'd choose 6 hours
The prescriber orders Trexall (methotrexate) 150 mg IV once every 14 days to treat a cancer. The patient weighs 164 lbs. a. The safe dose for this drug is 2.5 mg/kg IV every 14 days. What would be the safe dose for this patient? _________________mg b. Is the dose ordered for this patient safe? (yes/no) _______________
a. 186.4 b. yes
The prescriber orders Vancocin 1g in 250 mL of NS IVPB q12h. a. How long will it take this IVPB to run in if the standard IVPB rate is used? ___________min b. The nurse choses tubing labeled 20 gtts/mL. How many gtts/min will the nurse regulate the IVPB? (Only a whole number will be accepted.) ______gtts/min If a volumetric pump is available, what rate should the nurse set the pump for? ________mL/hr
a. 2.5 hours b. 33 c. 100 mL/hr
The prescriber orders a liter of D5 ½ NS to run over 12 hours. The tubing available is labeled 15 gtts/mL. a. Using the available tubing, what should the drop rate for this IV be? ______________gtt/min b. If the nurse had a volumetric pump available, what would the nurse set the pump for in mL/hr? _____________mL/hr
a. 21 b. 83.3
The prescriber orders Vancocin (vancomycin hydrochloride) 1 g in 200 mL NS over 2 hours IVPB q12h. The tubing is labeled 15 gtts/mL. a. At what rate should the nurse run the IVPB on a gravity drip? _____________gtt/min b. If a volumetric pump is available, at what rate should the nurse set the pump? ________________mL/hr
a. 25 b. 100
The prescriber orders morphine sulfate 0.3 mg IM stat for a child who weighs 68 pounds. The recommended dose is .01 mg per kg. a. How many kg does the child weigh? _____________kg b. What is the recommended dose for a child of this weight? ___________mg c. Is this a safe dose for this child? ______________ The morphine sulfate on hand comes in a concentration of 0.5 mg per mL. d. How many mL should the nurse administer to the child if the dose is determined to be safe? ____________mL
a. 30.9 b. 0.31 c. yes d. 0.6
The prescriber orders an IV of D5 RL to run at 125 mL per hour. The drop factor on the available tubing is 15 gtts/mL. a. How many drops per minute should the IV be regulated for? ______gtt/min (Only a whole number will be accepted.) b. If the nurse hangs a 1,000 mL bag at 11 AM, how much fluid will the patient receive by 4 PM (1500 hours)? ___________mL c. How much fluid will be left in the bag at 4 PM (1500 hours)? ________mL d. At what time will the bag need to be changed? ________________ (Specify AM or PM or use military time.)
a. 31 b. 625 c. 375 d. 7pm
The prescriber orders Ancef 1 g in 50 mL of NS IVPB q6h. There are no instructions regarding the amount of time to run the IVPB, so the nurse chooses the standard time of 30 min for 50 mL. a. If the IVPB tubing is labeled 20 gtts/mL, at what rate should the nurse run the IVPB on a gravity drip? ______________gtt/min b. If a volumetric pump is available, at what rate should the nurse set the pump? ______________mL/hr
a. 33 b. 100mL/hr
The prescriber orders Kefzol 500 mg IM now. The medication available is labeled as follows: KEFZOL 10 g Total amount diluent Approx. Concentration 45 mL 1 gram/ 5 mL 96 mL 1 gram/10 mL a. How much diluent should the nurse add for this situation? _________mL b. How many mL should the nurse administer to the patient? _________mL
a. 45 b. 2.5
At 0900 hours the nurse hangs an IV with 1000 mL of D5RL to run at 75 mL per hour. a. How much will be left in the bag (LIB) at 1500 hours? ______________mL b. At what time will a new bag need to be hung? _________________hr
a. 550 b. 10:20pm or 2220 hours
The prescriber orders gentamycin sulfate 3 mg/kg/day IVPB in 2 divided doses q12h for a patient weighing 161 pounds. a. How many kg dose the patient weigh? ________________kg b. How much medication should the patient receive per day? _____________mg c. How much medication should the patient receive per dose? ___________mg
a. 73.2 b. 219.5 c. 109.8
The prescriber orders gentamycin sulfate 240 mg IVPB q12h for a patient who weighs 172 lb. The safe dose range for gentamycin is 1 mg/ kg up to 5 mg/kg per day. a. How many kg does the patient weigh? ____________kg b. What is the lowest effective dose per day for this patient? ____________mg c. What is the highest safe dose per day for this patient? ____________mg d. What is the total dose per day ordered for this patient? __________mg e. Based on the calculations above, is the dose ordered for this patient within the safe dose range? ___________________ f. Would the dose be considered subtherapeutic, therapeutic, or toxic? ________________
a. 78.2 b. 78.2 c. 390.9 d. 480 e. no f. toxic
DOSE CALCULATIONS (g, mg, mcg) • Dose calculations may be rounded to the nearest ______ unless otherwise specified
tenth
POUNDS TO KILOGRAMS CONVERSIONS: round to the nearest
tenth • Round lb to kg conversions to the nearest tenth for adults. Do not round kg within a problem unless specifically instructed to do so.
Intravenous infusion by pump (mL/hr): round to the nearest
tenth of a mL
Do not use a _______ with a decimal.
trailing zero
Intravenous infusion by gravity (gtts/min): round to the nearest
whole number