Chapter 4 Calculating Medication Dosages Flashcards
Your 10.5kg paediatric patient is prescribed rifaMPICin 20mg/kg orally. It is to be administered once a day. The oral syrup, once reconstituted, contains 100mg in 5ml. How many millilitres need to be adminstered to this child?
10.5 mL
A client is prescribed 35mg of clorpromazine hydrochloride. You have 50mg in 2ml on hand. How many millilitres will you administer?
1.4 mL
1 L of intravenous normal saline is to be administered in four hours. How many millilitres per hour will this flow at?
250mL/hr
Your patient is ordered Hartmann’s solution at 1 L over 10 hours. Your giving set is a macrodrip which is 20 drops/mL. What is the rate in drops/mL for this infusion.
Formulae: if the time is given in hours use:
Rate (drops/min)= Volume (ml) x Drop factor (drops/mL)
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Time (hours) x 60
33 d/min
Your patient is ordered 380mL to be administered over eight hours intravenously. How much should be administered per hour and what is this in drops per minute? The giving set is a microdrip which is calibrated for 60 drops per mL
Formulae: if the time is given in hours use:
Rate (drops/min)= Volume (ml) x Drop factor (drops/mL)
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Time (hours) x 60
47.5mLhr and 48 d/min
Your patient is restricted to 2 L of fluid daily. They are not eating or drinking. They are also having intravenous acetylcystine regime. They will receive 200mL of 5% dextrose containing the medication over one hour, 500mL of 5% dextrose to run over the next four hours, and 1 L of 5% dextrose to run over the next 16 hours.
- How much more fluid can the patient have during this 24 hour period?
- At what rate will the 500mL infusion run in mL/hr?
- How many d/min will the 1 L infusion run when using a macrodrip giving set which is calibrated at 20 d/mL?
- 300ml
- 125mL/hr
- 21 d/min
You have just emptied a wound drainage bag and it contained 365mL of drainage. What is this amount in L?
0.365 L
Your patient is to be administered acetylcystine 0.75mL/kg. They weigh 56kg. How much of this medication will you administer?
42mL
Your patient is prescribed 0.125mg of digoxin daily. In the bottle, the tablets are 62.5 microg/tab. How many tablets will you administer?
2 tablets
Your patient is prescribed 2.5mg of morphine hydrochloride trihydrate subcutaneously. The ampoule contains 10mg/mL. How many mL will your administer?
0.25mL
