Review Note
Last Update: 06/20/2024 09:40 PM
Current Deck: MSA 460 Exam 2 - Community MASTER
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4. Make a solution of 0.25% marcaine with 1:300,000 epinephrine and 5 mg of
morphine in a total of 30 mls. Stock solutions are 0.5% marcaine, 1:1000
epinephrine, morphine (10mg/ml), and saline. All are unlimited in supply.
How many mls of each goes into the final 30 ml solution?
morphine in a total of 30 mls. Stock solutions are 0.5% marcaine, 1:1000
epinephrine, morphine (10mg/ml), and saline. All are unlimited in supply.
How many mls of each goes into the final 30 ml solution?
Back
Dilution Factor = Have / Want
Final Volume / Dilution Factor
Final Volume / Dilution Factor
Marcaine
- Have 0.5% Marcaine = 5 mg/ml
- Want 0.25% Marcaine = 2.5 mg/ml
- Dilution Factor = Have / Want = 5 / 2.5 = 2
- Final Volume / Dilution Factor = 30 ml / 2 = 15 ml
- 15 ml 0.5% Marcaine
Epi
- Have 1:1,000 Epi
- Want 1:300,000 Epi
- Dilution Factor = Have / Want = (1/1,000) / (1/300,000) = 300,000 /
1,000 = 300
- Final Volume / Dilution Factor = 30 ml / 300 = 0.1 ml
- 0.1 ml of 1:1,000 Epi
Morphine
- Want 5 mg Morphine
- Morphine is 10 mg/ml
- Want 5 mg Morphine
- Morphine is 10 mg/ml
- 0.5 ml = 5 mg Morphine
Final Solution 15 ml of 0.5% Marcaine, 0.1 ml of 1:1,000 Epi, 0.5 ml
of Morphine, 14.4 ml of Saline
extra
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