stuck at this problem

[longsilver]

hi guys, i am stuck at this problem at i am not sure how the book arrived at these answers. Can someone explain this to me. I really appreciate all the time and help. Thanks

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Order: carbenicillin disodium 1 g IM q6h for an adult

Stock: vial of powder labeled 2 g

Use the following label for reconstitution. For intramuscular use: The 2 g vial should be reconstituted with 4.0 mL of Sterile Water for Injection, 0.5% Lidocaine Hydrochloride (without epinephrine), or Bacteriostatic Water containing 0.9% benzyl alcohol. In order to facilitate reconstitution up to 7.2 mL diluent can be used. Amount of Diluent to be

Added to the 2 g vial Volume to be Withdrawn

for a 1 g Dose 4.0 mL 2.5 mL 5.0 mL 3.0 mL 7.2 mL 4.0 mL

The 5 g vial should be reconstituted with 7.0 mL Sterile Water for Injection, 0.5% Lidocaine Hydrochloride (without epinephrine), or Bacteriostatic Water containing 0.9% benzyl alcohol. In order to facilitate reconstitution up to 17 mL diluent can be used.

Amount of Diluent to be

Added to the 5 g vial Volume to be Withdrawn

for a 1 g Dose 7.0 mL 2.0 mL 9.5 mL 2.5 mL 12.0 mL 3.0 mL 17.0 mL 4.0 mL

After reconstitution, no significant loss of potency occurs for up to 24 hours at room temperature, and for 72 hours if refrigerated. Any of these unused solution should be discarded.

a. Add _____ mL and give _____ mL b. Add _____ mL and give _____ mL

[longsilver]

sorry for that, if you cannot understand how the problem is written you can look at number 7 in this page.

http://www.msumedcalc.com/quiz4.html

[Daytonite, BSN, RN]

there is no math involved, just read the directions on the label. you would use the smallest amount to dilute the powder since this is for an im injection. i don't understant why they are asking for 2 answers.

a. add __4 ml___ ml and give __2.5 ml___ ml b. add _____ ml and give ____ ml

[longsilver]

thanks finally an answer lol!

i did get the 4ml and 2.5 ml. what i did not get is the other answer which is 5 ml and 3 ml.

i was thinking it was pertaining to the second sentence which is 5 g vial reconsituted with 7 ml .... but ... that is why i am confused.

[longsilver]

i think i got i ... please correct me if i am wrong.

the second part of the problem which is for a 5 g vial is completely irrelevant since you only have 2 g vial in stock.

so you need to choose the TWO best answers since it is asking for two (a and b) ... so the best aswers are 4ml and 2.5 ml, and 5 ml and 3 ml.

[Daytonite, BSN, RN]

I think you are right.