HOSA Medical Math Chapter 5 Drug Dosages and Intravenous Calculations

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18 Terms

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gtt

Drop

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p.o.

Orally

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IM

Intramuscular

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IV

Intravenous

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q.4.h

Every 4 hours

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q.d.

Daily

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q.o.d.

Every other day

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b.i.d.

Twice a day

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t.i.d.

Three times daily

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q.i.d.

Four times daily

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p.r.n.

As needed

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stat.

immediately

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Dosage Formula

{(desired dose)/(on-hand dose)}*Vehicle=amount to give

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Short-Hand Dosage Formula

(D/H)*V=A

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Proportion Dosage Formula

(D/A)=(H/V)

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Rate of Flow Equation

(drop factor*amount of solution)/(time)=Rate of Flow

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Body Surface Area (metric)

Square Root of (height cm*weight kg)/3600

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Body Surface Area (American)

Square Root of (height in*weight lb)/3131