Volumes listed below
assume a final volume of 250 ml. If a volume
other than 250ml is requested and any of the following
additives are required (bupivacaine, fentanyl - alone or in
combination), use our
Popup calculator

Using this chart:
Example order: Epidural: 0.125% bupivacaine with
fentanyl concentration of 2 mcg/ml.
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Using the table below, this would require 62.5 ml of
bupivacaine and 10 ml of fentanyl for a total volume of 62.5
+ 10 = 72.5ml. Remove 72.5 ml from a 250 ml bag and
then add the additives listed above for a total volume of 250
ml.

Bupivacaine 0.5% vials (preservative-free):

Desired concentration

Volume needed

0.0625%

31.25 ml

0.075%

37.5 ml

0.1%

50 ml

0.125 %

62.5 ml

Bupivacaine 0.25% vials (preservative-free):

Desired concentration

Volume needed

0.0625%

62.5 ml

0.075%

75 ml

0.1%

100 ml

0.125 %

125 ml

Ropivacaine 0.5% vials (preservative-free):

Desired concentration

Volume needed

0.2% (preferred)

100ml

Ropivacaine 1.0% ampule (preservative-free):

Desired concentration

Volume needed

0.2% (preferred)

50 ml

Fentanyl 50 mcg/ml (preservative-free):

Desired concentration

Volume needed

2 mcg/ml

10 ml

5 mcg/ml

25 ml

7.5 mcg/ml

37.5 ml

10 mcg/ml

50 ml

Hydromorphone 10 mg/ml (preservative-free): Look carefully at vial - many contain sodium
metabisulfite which cannot be used.

Desired concentration

Volume needed

25 mcg/ml

0.625 ml

50 mcg/ml

1.25 ml

75 mcg/ml

1.875 ml

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