Help with Insulin/syringe math!!!

  1. 0
    Hi all!
    Am desperate for some help. A particular questions has been plaguing my fellow classmates and me. Our teachers presented us with a question in class that we can't seem to make sense of. The question was:
    If you were to draw up 5 units of U-50 insulin in a U-100 syringe, how much would you draw up?
    Now, I know that technically you should only draw up insulin with a syringe calibrated to the same concentration of insulin (use a U-50 syringe with U-50 insulin, U-100 syringe with U-100 insulin, etc.). Ignoring that fact, how much would you draw up? I was so confused by the answer that I didn't even bother to write it down, so I don't remember what the answer was. Can anyone answer, and explain that answer, to me?
  2. Get our hottest nursing topics delivered to your inbox.

  3. 5,215 Visits
    Find Similar Topics
  4. 2 Comments so far...

  5. 0
    From what I could find online, u 50 is a 1/2 strength insulin. So 5 units of u 50 would be 2.5 units of u 100, at least that's what I'm thinking. Not sure if its right. I haven't run into having to draw up u50 insulins. We have u100 on our unit.
  6. 1
    U-50 insulin contains 50 units in each mL, and so 5 units would be 0.1mL.

    U-100 syringe is calibrated such that each unit equals 0.001mL (100 units in 1mL). You need to draw up 0.1mL, which would be the 10-unit mark on this syringe.

    Or, as previous poster said, U-50 insulin is half strength of U-100 insulin. So, you'll need twice the amount -- so you need to draw up to 10-unit mark instead of 5-unit mark.
    turnforthenurseRN likes this.