Doctor’s Order: ¼ L of D5W to infuse over 2 hr 45 min; Drop factor: 60 gtt/mL. How many gtt/min will you regulate the IV?
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Solution
\(\frac{250\, ml}{2\, hrs\, \times 60\, mins\\\, +\, 45\, mins}\times 60\, gtt/ml= 91\, gtt/min\)
Doctor’s Order: Rocephin 0.5 grams in 250 mL of D5W to infuse IVPB 45 minutes; Drop Factor: 12gtt/min. How many gtt/ min will you regulate the IVPB?
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Solution
\(\frac{250\, ml}{45\, mins}\times 12\, gtt/ml= 67\, gtt/min\)
Doctor’s Order: Infuse 1200 mL of 0.45% Normal Saline at 125 mL/hr; Drop Factor: 12gtt/min. How many gtt/min will you regulate the IV?
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Solution
\(\frac{125\, ml}{1\, \times 60\, mins}\times 12\, gtt/ml= 25\, gtt/min\)
Doctor’s Order: Mandol 300 mg in 50 mL of D5W to infuse IVPB 15 minutes; Drop factor: 10 gtt/mL. How many mL/hr will you set on the IV infusion pump?
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Solution
15 min = 0.25 hr
\(\frac{50\, ml}{0.25\, hr}= 200\, ml/hr\)
Doctor’s Order: 1 ½ L of NS to be infused over 7 hours; Drop factor: 15 gtt/mL. What flow rate (mL/hr) will you set on the IV infusion pump?
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Solution
\(\frac{1,500\, ml}{7\, hrs}= 214.3\, ml/hr\)
Doctor’s Order: Infuse 50 mg of Amphotericin B in 250 mL NS over 4 hr 15 min; Drop factor: 12gtt/mL. What flow rate (mL/hr) will you set on the IV infusion pump?
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Solution
4 hr 15 min = 4.25 hrs [4 hrs + (15 mins÷60 mins)]
\(\frac{250\, ml}{4.25\, hrs}= 58.8\, ml/hr\)
Doctor’s Order: Tazidime 0.3 g IM tid; Reconstitution instructions: For IM solution add 1.5 mL of diluent. Shake to dissolve. Provides an approximate volume of 1.8 mL (280 mg/mL). How many mL will you give?
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Solution
\(\frac{0.3\, g}{280\, mg/ml}\times \frac{1,000\, mg}{1\, g}\times 1\, ml= 1.1\, ml\)
Doctor’s Order: Bumex 0.8 mg IV bolus bid; Reconstitution instructions: Constitute to 1000 micrograms/3.1 mL with 4.8mL of 5% Dextrose Water for Injection. How many mL will you administer?
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Solution
1 mg = 1,000 mcg
\(\frac{0.8\, mg}{1,000\, mcg}\times \frac{1,000\, mcg}{1\, mg}\times 3.1\, ml= 2.5\, ml\)
Doctor’s Order: Streptomycin 1.75 mg/ lb IM q 12 hr; Available: Streptomycin 0.35 g / 2.3 mL. How many mL will you administer a day to a 59 Kg patient?
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Solution
59 kg = 130 lbs
1.75 mg/lbs x 130 lbs = 227.5 mg\(\frac{227.5\, mg}{0.35\, g}\times \frac{1\, g}{1,000\, mg}\times 2.3\, ml= 1.5\, ml\)
1.5 ml x 2 = 3 ml
Doctor’s Order: Demerol 50 mg IVP q 6 hr prn pain; Available: Demerol 75 mg/ 1.3mL. How many mL will you administer?
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Solution
\(\frac{50\, mg}{75\, mg}\times 1\, ml= 0.87\, ml\)