Here's a link to something I posted awhile back....
Also, when drawing blood on kiddos, remember that it's not always necessary to stick them with a needle. Heel/finger sticks can be just as accurate IF DONE PROPERLY.
1. Clean the site thoroughly with alcohol and allow to air dry.
2. Hold the heel/finger firmly.
3. Hold the lancet FIRMLY against the extremity or finger you're sticking and parallel to the ridges of the fingers and toes.
4. Lance the skin and let the blood drip to gravity. Wipe the first drop off with gauze.
5. Hold the collection container (bullet or microtainer) up to the blood and allow to DRIP. DO NOT SCRAPE, THIS WILL LYSE THE CELLS. If you're only doing a digoxin level this won't matter, but if you're wanting, say, electrolytes...your K level's gonna be way off - because you've clotted the sample.
It is okay to squeeze gently, or to "milk" gently.
Once you've filled your container, be sure to invert it once to allow for mixing of the blood with whatever agent is inside the tube (sodium heparin/ EDTA, whatever.) Do NOT overshake, as this will also clot your sample.
Do not fill past the fill line on any sample. The tubes and bullets are marked so that the precise amount of additive is able to keep the sample "usable" for the lab. Especially important for tests like PT/PTT/INR. Too much or too little blood in those tubes and you'll be sticking again.
Don't think that you can't get 1cc out of a fingerstick, with many patients...you can.
For the patients sake, know exactly how much you can draw per day. 1 ml per kg of body weight.
Warm fingers and heels up prior to sticking...
I'm sure there's more I'll think of at 1145 when I'm asleep, but the above may help you.
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