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ABG's

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CallaRN CallaRN (New) New

OK...here's my question this week.... What's your policy on drawing ABGs from UACs.... Have any of you heard that using alcohol before drawing up could cause a change in values? So are you supposed to draw back a few ccs then get your abg sample, then put the removed blood back, and then alcohol and cap off? I'm sorry to ask you guys this! IT's just that I ask a million questions at work... and I feel like I should know the answer to this one! Thanks!!!

Our policy is to prep the port with betadine or persist (betadine/alcohol swab). It's important to let the betadine dry so I usually prep first and then gather my supplies. I clear the line with approximately 1 cc (for an ABG ... more for a chemistry or coags). After drawing the gas, and making sure I have not contaminated the clear, I give it back. I then clean the blood off the port with alcohol. Some nurses draw back less and waste the clear, but I prefer to do it this way because a heparin- contaminated gas is useless. If you're ever surprised by an incredibly acidotic gas result with PCo2 in the teens and a significant base deficit, it may be heparin-contaminated.

In my unit, we don't prep the port at all--neither alcohol nor betadine. We just draw back 1-2 mLs of hep/blood and then draw our ABG sample. However, our RTs do a great deal of sampling from those lines as well. I just keep the line sterile and don't let it touch anything. That's how I was taught, though. As usual, however, there are always errors in practice and I've witnessed them. On the other hand, we do not have a lot of infected UACs or PALs. Guess it kinda varies everywhere with different schools of thought.

NicuGal, MSN, RN

Specializes in NICU, PICU, PACU. Has 30 years experience.

Betadine, alcohol and then draw. Same for central line draws.

I have a question NCIUJOE...do you prep your IIP's/HL's and IV ports before giving meds? Or do you not have a rubber stopper on the end of the port? We aren't allowed to leave syringes on ours, we always have a port stopper.

We draw back 1ml, draw our sample(s), give back the first draw and flush with 0.5cc hep saline. If drawing coags it is 3 ml draw and then the coags and then give it back.

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