What I've found that works the best when dealing with most difficult sticks is to apply heat (such as with an infant heel warmer/heat pad) to the site for at least 5 mins before the venipuncture. This allows me time to gather a 23 gauge butterfly and (usually) 10 ml syringe and transfer device. I have found that with these difficult sticks I do not want to take the chance of using up the only possible good vein I might have left by using a straight vacutainer needle on that patient. The vacuum in the tube can often cause the vein (espeically small ones) to collapse from the pressure of the vacuum needed to pull the blood into the tube. Using the syringe allows me to manually draw back the amount of blood needed without losing the vein. Yes it take more time but I've never had a patient of mine complain because I took the time. Be sure to remind your patient not to pump their hand (as we were taught old school) once the tourniquet is applied because this pumping action can incorrectly yield a dramically high potassium level.
Make sure you run the syringe plunger up and down the barrow of the syringe to loosen it up inside before use. Push the plunger all the way back (eliminating any air into the syringe). Failure to do so will result in little to no blood being able to be brought into the syringe. Nurses often mistake this lack of blood return to a bad needle position and try to make unnecessary needle adjustments. Doing this can often cause the specimen to be very hemolyzed (not to mention the extra pain to the patient) and time needed for a recollect.
In a perfect world we'd always be able to draw the blood from the a/c site but depending on the patient's medical condition I would check your unit's policy as to what sites are allowed and not allowed.
Remember... syringes are our friends
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