Doctor’s Order: Heparin 4,390 units Sub Q bid; Available: Heparin 5,000 USP units per ml in 10 ml. How many mL will you administer?
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Solution
\(\frac{4,390\, units}{5,000\, USP \, units}\times 1\, ml= 0.88\, ml\)
Doctor’s Order: Tobramycin 1.25mg/Kg IM q 12 hr; Available: Tobramycin 0.2 g/mL. How many mL will you administer to a 183 lb patient for each dose?
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Solution
183 lb = 83.2 kg
83.2 kg x 1.25 mg/kg = 104 mg\(\frac{104\, mg}{0.2\, g/ml}\times \frac{1\, g}{1,000\, mg}= 0.52\, ml\)
Your patient has had the following intake: ½ cup of hot tea (240 mL/cup), 3/4 container of grapefruit juice (4 oz/container), 3/4 qt of milk, 1 pt of water, 125 mL of D5W IV x 8 hr and 2 oz of fruit cocktail. What will you record as the total intake in mL for this patient?
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Solution
1 oz = 30 ml
1 qt = 1000 ml
120 ml + 90 ml + 750 ml + 500 ml + 1,000 ml = 2,460 ml (Fruit cocktail is not liquid at room temperature, so it is not included when calculating intake.)\(\frac{104\, mg}{0.2\, g/ml}\times \frac{1\, g}{1,000\, mg}= 0.52\, ml\)
Your patient had the following intake: 2 1/2 bowls of broth (180 mL/bowl), 1 can of tomato juice (4.5 oz/can ), 4 oz of cottage cheese, 1 ¾ L of NS IV and ½ pt of ice cream. What will you record as the total intake in mL for this patient?
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Solution
1 oz = 30 ml
1 pt = 500 ml
450 ml + 135 ml + 1,750 ml + 250 ml = 2,585 ml (Cottage cheese is not liquid at room temperature, so it is not included when calculating intake.)
Doctor’s Order: Vistaril Oral Susp 10 mg q 4 hr prn anxiety; Directions for mixing: Add 125 mL of water and shake well. Each tsp will yield 15 mg of Vistaril. How many mL will you give?
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Solution
\(\frac{10\, mg}{15\, mg}\times 1\, tsp= 0.67\, tsp\times \frac{5\, ml}{1\, tsp}= 3.3\, ml\)
Doctor’s Order: Megace Oral Suspension 160 mg po bid; Directions for mixing: Add 100 mL of water and shake vigorously. Each 0.5 mL will contain 10.7 mg of Megace. How many tbsp of Megace will you administer?
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Solution
\(\frac{160\, mg}{10.7\, mg}\times 0.5\, ml= 7.5\, ml\)
\(7.5\, ml\times \frac{1\, tbsp}{15\, ml}= 0.5\, tbsp\)
Doctor’s Order: Klotrix 0.35 mEq/ lb po dissolved in 6 oz of oj at 8 am; Available: Klotrix 8 mEq/mL. How many mL of Klotrix will you add to the oj for a 20.5 Kg patient?
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Solution
20.5 kg x 2.2 lbs = 45.1 lbs
45.1 lbs x 0.35 0.35 mEq/lb = 15.8 mEq/lb\(\frac{15.8 \, mEq/lb}{8\, mEq/lb}\times 1\, ml= 2\, ml\)
Doctor’s Order: Digoxin 0.25 mg po daily; Available: Digoxin 125 mcg tabs (scored). How many tab will you administer for this dose?
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Solution
\(\frac{0.25\, mg}{125\, mcg}\times \frac{1,000\, mcg}{1\, mg}= 2\, tabs\)
Doctor’s Order: Dilantin 0.75 gm po stat; Available: Dilantin 250 mg cap. How many cap will you administer?
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Solution
\(\frac{0.75\, g}{250\, mg}\times \frac{1,000\, mg}{1\, g}= 3\, caps\)
Doctor’s Order: Minipress 3000 mcg po ac; Available: Minipress tabs 2 mg (scored). How many tab will you administer in 24 hr?
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Solution
\(\frac{3,000\, mcg}{2\, mg}\times \frac{1\, mg}{1,000\, mg}\times 1\, tab\,\times 3= 4.5\, tabs\)