whats the smallest gauge needle used for CBC?

  1. Could you use a 25 gauge needle for a CBC draw? I would think it would be to small and damage some of the red blood cells, making the CBC inaccurate.
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    Joined: Aug '05; Posts: 126; Likes: 9


  3. by   Mags4711
    Sure you can use a 25g. It's used all the time in peds.
  4. by   suebird3
    I am used to using 20's or 21's......and butterflies in Ped's.

  5. by   Daytonite
    boy! are the phlebotomy gods with you today! i happened to run across a really nice website yesterday explaining how to do phlebotomy. i'm sure your question is answered in there because i remember seeing something in there about hemolysis which would be a concern when using a small gauge needle to draw blood. there is a slide show of photographs on how to draw blood and do a fingerstick (the lab version, not for doing a blood glucose) to link into at the site. here is the link. read on!
  6. by   VickyRN
    Thanks, Daytonite, for a truly awesome resource.

    We either use butterflies for our lab draws (21, 23, or 25 gauge) or vacutainer needles (21 or 22gauge).

  7. by   hotdog19d
    thank you!