Doctor’s Order: Heparin 7,855 units Sub Q bid; Available: Heparin 10,000 units per ml. How many mL will you administer?
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Solution
\(\frac{7,855\, units}{10,000\, units}\times 1\, ml= 0.79\, ml\)
Doctor’s Order: Kantamycin 7.5 mg/kg IM q 12 hr; Available: Kantamycin 0.35 Gm/mL. How many mL will you administer for each dose to a 157 lb patient?
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Solution
157 lbs = 71.36 kg or 71 kg
7.5 mg/kg x 71 kg = 532.5 mg\(\frac{532.5\, mg}{350\, mg}\times \, 1\, ml= 1.5\, ml\)
Your patient has had the following intake: 8 oz glasses of iced tea, 4 oz cartons of grape juice, ¾ pt of ice cream, 32 oz of juice, 1 ½ L of D5W IV and 6 oz of cottage cheese. What will you record as the total intake in mL for this patient?
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Solution
1 pt = 500 ml
1 oz = 30 ml
240 ml + 120 ml + 375 ml + 960 ml + 1,500 ml = 3,195 ml (Cottage cheese is not liquid at room temperature, so it is not included when calculating intake.)
Your patient has had the following intake: 2 ½ cups of coffee (240 mL/cup), 11.5 oz of grape juice, ¾ qt of milk, 320 mL of diet coke, 1 ¼ L of D5W IV and 2 oz of grits. What will you record as the total intake in mL for this patient?
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Solution
1 qt = 1,000 ml
1 oz = 30 ml
600 ml + 345 ml + 750 ml + 320 ml + 1,250 ml = 3,265 ml (Grits is not liquid at room temperature, so it is not included when calculating intake.)
Doctor’s Order: Sulfasalazine Oral Susp 500 mg q 6 hr; Directions for mixing: Add 125 mL of water and shake well. Each tbsp will yield 1.5 g of Sulfasalazine. How many mL will you give?
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Solution
1 tbsp = 15 ml
\(\frac{500\, mg}{1.5\, g}\times \frac{1\, g}{1,000\, mg}\times 15\, ml= 5\, ml\)
Doctor’s Order: Cleocin Oral Susp 600 mg po qid; Directions for mixing: Add 100 mL of water and shake vigorously. Each 2.5 mL will contain 100 mg of Cleocin. How many tsp of Cleocin will you administer?
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Solution
\(\frac{600\, mg}{100\, mg}\times 2.5\, ml= 15\, ml\)
\(15\, ml\times \frac{1\, tsp}{5\, ml}= 3\, tsp\)
Doctor’s Order: Diuril 1.8 mg/kg po tid; Available: Diuril 12.5 mg caps. How many cap will you administer for each dose to a 31 lb child?
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Solution
31 lbs = 14 kg
1.8 mg/kg x 14 kg = 25.2 mg or 25 mg (per dose)\(\frac{25\, mg}{12.5\, mg}\times 1\, cap= 2\, caps\)
Doctor’s Order: Synthroid 75 mcg po daily; Available: Synthroid 0.15 mg tab (scored). How many tab will you administer?
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Solution
1 mg = 1,000 mcg
\(\frac{75\, mcg}{0.15\, mg}\times \frac{1\, mg}{1,000\, mcg}\times 1\, tab= 0.5\, tab\)
Doctor’s Order: Nafcillin 500 mg po pc; Available: Nafcillin 1 gm tab (scored). How many tab will you administer per day?
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Solution
1 g = 1,000 mg
\(\frac{500\, mg}{1\, g}\times \frac{1\, g}{1,000\, mg}\times 3\, meals\times 1\, tab= 1.5\, tabs\)
Doctor’s Order: Tylenol supp 1 g pr q 6 hr prn temp > 101; Available: Tylenol supp 325 mg (scored). How many supp will you administer?
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Solution
1 g = 1000 mg
\(\frac{1\, g}{325\, mg}\times \frac{1000\, mg}{1\, g}\times 1\, supp= 3.08\, or\, 3\, supp\)