T or F: Medical Math Flashcards
70 mg of phenobarbital equals 1 grain of phenobarbital
False
There are 64.8 mg in 1 grain
100 kg is 220 lbs
True
110 lbs is 50 kg
True
10% Mannitol = 0.1gm/mL of Mannitol
True
Know that 10% = 10g/100mL = 0.1g/mL
2.5 tsp = 12.5 mLs
True
1 tsp= 5 mLs
2.5 tsp x 5 = 12.5 mLs
If a patient was ordered to receive 442.5 mg and the patient weighed 29.5 kg, the recommended dosage for the drug was 15 mg/kg.
True
442.5 mg/ 29.5 kg = 15 mg/kg
If 565 mg of a drug with a concentration of 50 mg/mL was given to a patient, the patient should have received 11.3 mL of the drug
True
565 mg /50 mg/mL = 11.3 mL
If an 18 lb dog needs 85 mg of Lasix 5%, the dog should receive 1.7 mLs of Lasix
True
Take the dose 85 mg and divide it by the concentration (5% = 5gm/mL = 50 mg/mL)
85 mg / 50mg/mL =1.7 mL
If 2 1/2 tablets of a drug with the strength of 75 mg were given to a patient, the dosage the patient received was 187.5 mg.
True
If a patient is to receive 0.5 mL/lb and the patient weighs 15 kg, the patient should receive 7.5 mLs of the drug
False
Take the recommended volume of 0.5mL/lb and multiply it by the weight (15kg x 2.2 = 33 lbs) so 0.5 mL/lb x 33 lbs =16.5 mL
If 375 mg of a drug has been ordered, you will give 1 1/2 tablets with a 250 mg strength
375 mg / 250 mg/tab = 1.5 tablets
If the tablets of a drug ordered contain 75 mg/tablet, and the patient is to receive 150 mg of the drug, should the patient receive 1/2 tablet of the drug
False
150 mL of 40% Dextrose should be added to 600 mLs of LRS to make a 5% Dextrose solution
False
C1V1=C2V2
(40%)V1 = (5%)(600mL)
V1 = (5 x 600 mL) /40 =75mL
The drug label reads 8%. The concentration of the drug in the bottle would be 80mg/mL.
True
8% x 10 = 80mg/mL
If a patient needs 495 mg of a drug and the drug label reads 4% concentration, the volume of the drug to be given would be 5mL.
False
495 mg/ x mL = 40mg/ 1 mL
x mL = 12.4 mL
If the dosage of lidocaine to be added to a patient’s IV fluid bag is 88ug of the drug and the concentration of lidocaine is 15ug/mL, you would add 5.9mLs of lidocaine to the IV fluid
False
880ug/ 15ug/mL=58.7mL
80 mL of 50% dextrose should be added to 800 mL of LRS to prepare a 5% dextrose solution.
True
C1V1=C2V2
0.5xV1=0.05x800mL
V1=(0.05 x 800) / 0.5=80 mL
150 mL of 40% Dextrose should be added to 600 mL of LRS to make a 5% Dextrose solution.
False
If the tablets of a drug ordered contain 75 mg/ tablet, and the patient is to receive 50 mg of the drug, the patient should receive 1/2 tablet of the drug.
False
If a 50 lb patient is to receive 1.8 mg/kg/hr of fentanyl, and there are 10 hours remaining in the IV fluid bag, the total dosage to be added to the IV bag would be 408.6 mg fentanyl
True
If a patient is to be on 80 mL/hr of surgical fluids. The drip rate for this patient using a 15 gtt/mL drip set would be 3gtt/10 sec
True
