How to draw blood from a PICC line

  1. 0
    When drawing blood from a double lumen PICC line, which has TPN running do you

    1/ Flush with 10mls of normal saline, pull back 10mls of blood discard and throw that away before taking your sample.

    2/ Turn off TPN and wait for 30 mins and then draw blood, after having flushed with normal saline, drawing back, throw first sample away and then take a second sample.

    3/ Draw the blood without flushing

    4/ Turn off TPN, immediatly flush the line, draw blood, discard first specimen and then take a second sample.

    5/ None of the above-explain

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  3. Poll: How do you draw blood from a Double lumen PICC line which has TPN running

    • Dont stop TPN Flush 2nd port with 10mls of saline, draw back10mls back, discard, then take sample

      16.00% 68
    • Stop TPN wait 30 mins and then do the same as option 1

      22.12% 94
    • Just draw blood no flushing and no discarding

      1.41% 6
    • Stop TPN but immediatly flush with 10mls, draw back and discard and then take sample.

      49.18% 209
    • Non of the above-please expand

      11.29% 48
    425 Votes
  4. 13 Comments...

  5. 0
    Our policy for blood draws from a PICC was to stop any IVF infusing, flush the lines with 10cc of saline, withdraw a waste, withdraw the sample, then flush with 20cc of saline before starting the fluids again. If TPN was infusing, we flushed with 20cc of saline beforehand. When I left, they were re-writing the policy to delete the step of flushing prior to the waste.
  6. 0
    So what is the answer for sure? Maybe I am missing it.
  7. 0
  8. 0
    Some of our patients get q2h blood draws. I would never get the TPN in if I stopped it for 30 minutes every time I needed to draw blood, and my patients' blood sugars would be a mess. The whole point of stopping, clamping, and drawing a waste is that you're getting their blood, not what's infusing.
  9. 2
    Draw from other port.
    Flush with 10 cc NS, waste, draw sample and flush with 20 cc NS
    Last edit by RaeRN30 on Nov 4, '10 : Reason: Oops
    turnforthenurseRN and K+MgSO4 like this.
  10. 3
    Stop TPN, flush and clamp lumen
    Flush 2nd lumen with 10ml
    Waste 10ml
    Draw labs
    Flush again with 10ml
    Unclamp and resume TPN
  11. 0
    TPN must always run through a dedicated port. The TPN should be stopped for a minute. Flush the other lumen with 10cc of saline and confirm blood flow with your flush syringe and actually draw your 10cc waste back in that same syringe. Draw your sample and flush well with 20cc of saline.
  12. 0
    I would basically do what annister did.
    1) Stop and cap TPN or pause and clamp tubing.
    2) Clean both ports. Flush both ports with 10 cc syringe
    3) On port that wasn't being used for TPN withdraw waste (10 cc).
    4) Draw labs.
    5) Flush with 10 cc syringe or 20cc (there is no protocol for which on my floor)
    6) Restart TPN.
  13. 0
    I use to think we stopped TPN for 30 minutes until I read hospital policy on this a week ago. I understand all hospital policies are different. Ours states to stop TPN for 5 minutes. Flush all ports with 10 ml NS. Draw 10ml waste. Draw blood with empty 10 ml syringe and transfer device. We then flush every port with 2- 10 cc NS syringes in a pulsating motion. We always leave 1 ml of NS in the last flush for a total of 19 cc's per port. I had a patient going into fluid overload last week on TPN,Lipids,and NS. I called the doc to get orders. Our policy states to never stop TPN abruptly and if you do so then to hang d10 at the same rate as the TPN and monitor for hypoglycemia. Not sure if that is the same everywhere. I just wonder how long TPN can be stopped before d10 needs to be hung.

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