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Lidocaine Dosage Calculations

by Michelle Liwosz
(Middlebur, Ohio. USA)











































Dosage Calculations

Mr. Golden had an MI (Myocardial Infarction, heart attack) and now has a run of V-tach (Ventricular Tachycardia, fast heart rhythm).

You are to give him Lidocaine 50 mg. IVP. Lidocaine comes in a 5 ml, prefilled syringe containing 20 mg/ml.

How many ml do you give?

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Nov 21, 2012
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Dosage Calculations
by: Staff





Answer



Desired Dose: 50 mg of Lidocaine

Concentration: 20 mg per ml in prefilled syringe (note that the concentration does not depend upon how many ml each prefilled syringe holds)


Desired dose
ml to be given = ─────────────
Concentration

You have already identified the components of
the doctor’s order. To find the dosage, fill
in the formula.

50 mg
ml to be given = ────────────
20 mg per ml

mg per ml is really a fraction of the units of
measurement mg/ml

50 mg
ml to be given = ───────────
20 mg / ml

50 * mg
ml to be given = ──────────────
20 * (mg / ml)

50 * mg * ml
ml to be given = ─────────────
20 * mg

the unit mg in the numerator cancels with
the unit mg in the denominator

50 mg * ml
ml to be given = ─────────────
20 mg


ml to be given = 2.5 ml


Final Answer:

ml to be given = 2.5 ml






Thanks for writing.

Staff
www.solving-math-problems.com



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