ok, when aspirating i know you have to pull back to check for blood, but how much pressure is needed. using oil it is very hard to pull back, almost impossible,especially with one hand. does the plunger need to move back, or do you need to apply just a little pressure, and because the blood in the vein is pressurised it would shoot straight into the syringe anyway.
thanks for any help |
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good rule of thumb is to pull back enough to see little bubbles pulling into the syringe from the vacume your creating. and yes if you hit a vein you would only have to pull back ever so slightly before drops of blood enter the syringe.
dont forget once you aspirate to keep the needle in the same position/penetration while injecting.
hope that helps
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Quote: | ...... or do you need to apply just a little pressure, and because the blood in the vein is pressurised it would shoot straight into the syringe anyway.
thanks for any help | That is correct.
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cheers guys
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I usually only use a slight flick with my thumb. The first time you draw blood you'll see just how little pressure is needed to aspirate. Many aspirate much too hard and could possibly be in a vein but collapse the vein wall so no blood comes into the syringe when you aspirate but open up for you to mainline it.
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I think I'm maybe aspirating too hard. It's pretty hard doing it with only one hand (sust. 250), and I aspirate so that I see the bubbles come into the syringe. But are you saying that if I'd hit a vein, it wouldn't be so hard to pull back on the plunger? In that case, do I need to aspirate so hard that I see the bubbles in the syringe?
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