1 of 50
Term
A client who has heart failure with paroxysmal atrial tachycardia is
receiving digoxin (Lanoxin) 0.45 mg IV as the inital digitalizing dose.
The pharmacy provides 0.25 mg/ml. How many ml should the nurse
administer? (Enter numeric value only. If rounding is required, round
to the nearest tenth.)
Using the formula D/H x Q
Give this one a try later!
Answer: 206
Using the formula Desired % / on Hand % x Volume Desired = 75/100 x 275 = 0.75
x 275 = 206 Ensure
206 ml Ensure + 69 ml water = 275 ml (75% solution)
Answer: 1.8
, Using the formula D/H x Q = 0.45 mg/0.25 mg x 1 mL = 1.8 ml
Answer: 2
10 mg : X ml = 5 mg : 1 ml5X = 10X = 2 ml
Answer: 2000
Rationale
To calculate the amount of medication being delivered each hour: First convert
grams to mg: 1 gram = 1000 mg :: 4 grams = 4000 mg Next calculate number of
mg delivered/hour 4000 mg : 250 ml :: X mg : 125 ml4000/X :: 250/12550000=
250X X = 2000 mg/hour
Don't know?
2 of 50
Term
Mineral oil U.S.P 30 ml PO daily for 3 days is prescribed for a client
who is experiencing severe constipation. The dose cup is marked in
tablespoons. How many tablespoons should the nurse administer?
(Enter numeric value only.)
Give this one a try later!
Answer: 2
Answer: 10.5
15 ml equals 1 Tablespoon. Use
Rationale
the ratio equation: 15 ml : 1 Tbs
Using the formula, Desired dose /
:: 30 ml : X
dose on Hand x Quantity of volume
:: 1 / X
on hand (D/H x Q)
126 mg / 60 mg x 5 ml = 10.5 ml
, 15X = 30
X = 2 Tablespoons
Answer: 33 Answer: 60
Rationale Rationale
2 grams = 2000 mg1 hour = 60 The continuous feeding is regulated
minutes2000 mg/60 minutes = using the prescribed volume/time,
33.333 mg/minute, rounded to 33 ml/hour.
mg/minute 240 ml/4 hour = 60 ml/hour
Don't know?
3 of 50
Term
A client with a Trichomonas vaginalis infection receives a
prescription for metronidazole (Flagyl) 1 gram. The medication is
available in 500 mg tablets. How many tablets should the nurse
administer? (Enter numeric value only.)
Give this one a try later!
Answer: 1.5
Answer: 4
Rationale
Use ratio and proportion, 30 mg : X Rationale
tablets = 20 mg : 1 tablet Using the formula, Desired/Have:
20X = 30 300 mg/75 mg = 4 tablets
X = 1.5
, Answer: 167
Answer: 2
Rationale
Calculate using the ratio: 1000 ml : 6 1 gram = 1000 mg
hours :: X ml : 1 hour 1 tablet :: 500 mg = X tablets ::
1000/X :: 6/1 1000 mg
Don't know?
6X = 1000 X = 1000/500 = 2 tablets
X = 167 ml/hour
4 of 50
Term
A client who had a small bowel resection two weeks ago is receiving
3/4 strength Ensure feedings 275 ml every 4 hours via nasogastric
tube. Full strength Ensure is available in a 240 ml can. The nurse
should use how many ml of Ensure to prepare the feeding? (Enter
numeric value only. Round to nearest whole number if needed.)
Give this one a try later!
Answer: 206
Using the formula Desired % / on Hand % x Volume Desired = 75/100 x 275
= 0.75 x 275 = 206 Ensure
206 ml Ensure + 69 ml water = 275 ml (75% solution)
Answer: 582
Rationale
The child's weight in kg (2.2 : 1 kg :: 32 pounds : X kg = 14.54 kg) is used to
calculate the recommended dose (40 mg x 14.54 kg/day = 581.81 = 582 mg).The
prescribed dose in 24 hours is 194 mg x 3 doses = rounded to 582 mg.
Term
A client who has heart failure with paroxysmal atrial tachycardia is
receiving digoxin (Lanoxin) 0.45 mg IV as the inital digitalizing dose.
The pharmacy provides 0.25 mg/ml. How many ml should the nurse
administer? (Enter numeric value only. If rounding is required, round
to the nearest tenth.)
Using the formula D/H x Q
Give this one a try later!
Answer: 206
Using the formula Desired % / on Hand % x Volume Desired = 75/100 x 275 = 0.75
x 275 = 206 Ensure
206 ml Ensure + 69 ml water = 275 ml (75% solution)
Answer: 1.8
, Using the formula D/H x Q = 0.45 mg/0.25 mg x 1 mL = 1.8 ml
Answer: 2
10 mg : X ml = 5 mg : 1 ml5X = 10X = 2 ml
Answer: 2000
Rationale
To calculate the amount of medication being delivered each hour: First convert
grams to mg: 1 gram = 1000 mg :: 4 grams = 4000 mg Next calculate number of
mg delivered/hour 4000 mg : 250 ml :: X mg : 125 ml4000/X :: 250/12550000=
250X X = 2000 mg/hour
Don't know?
2 of 50
Term
Mineral oil U.S.P 30 ml PO daily for 3 days is prescribed for a client
who is experiencing severe constipation. The dose cup is marked in
tablespoons. How many tablespoons should the nurse administer?
(Enter numeric value only.)
Give this one a try later!
Answer: 2
Answer: 10.5
15 ml equals 1 Tablespoon. Use
Rationale
the ratio equation: 15 ml : 1 Tbs
Using the formula, Desired dose /
:: 30 ml : X
dose on Hand x Quantity of volume
:: 1 / X
on hand (D/H x Q)
126 mg / 60 mg x 5 ml = 10.5 ml
, 15X = 30
X = 2 Tablespoons
Answer: 33 Answer: 60
Rationale Rationale
2 grams = 2000 mg1 hour = 60 The continuous feeding is regulated
minutes2000 mg/60 minutes = using the prescribed volume/time,
33.333 mg/minute, rounded to 33 ml/hour.
mg/minute 240 ml/4 hour = 60 ml/hour
Don't know?
3 of 50
Term
A client with a Trichomonas vaginalis infection receives a
prescription for metronidazole (Flagyl) 1 gram. The medication is
available in 500 mg tablets. How many tablets should the nurse
administer? (Enter numeric value only.)
Give this one a try later!
Answer: 1.5
Answer: 4
Rationale
Use ratio and proportion, 30 mg : X Rationale
tablets = 20 mg : 1 tablet Using the formula, Desired/Have:
20X = 30 300 mg/75 mg = 4 tablets
X = 1.5
, Answer: 167
Answer: 2
Rationale
Calculate using the ratio: 1000 ml : 6 1 gram = 1000 mg
hours :: X ml : 1 hour 1 tablet :: 500 mg = X tablets ::
1000/X :: 6/1 1000 mg
Don't know?
6X = 1000 X = 1000/500 = 2 tablets
X = 167 ml/hour
4 of 50
Term
A client who had a small bowel resection two weeks ago is receiving
3/4 strength Ensure feedings 275 ml every 4 hours via nasogastric
tube. Full strength Ensure is available in a 240 ml can. The nurse
should use how many ml of Ensure to prepare the feeding? (Enter
numeric value only. Round to nearest whole number if needed.)
Give this one a try later!
Answer: 206
Using the formula Desired % / on Hand % x Volume Desired = 75/100 x 275
= 0.75 x 275 = 206 Ensure
206 ml Ensure + 69 ml water = 275 ml (75% solution)
Answer: 582
Rationale
The child's weight in kg (2.2 : 1 kg :: 32 pounds : X kg = 14.54 kg) is used to
calculate the recommended dose (40 mg x 14.54 kg/day = 581.81 = 582 mg).The
prescribed dose in 24 hours is 194 mg x 3 doses = rounded to 582 mg.
