To prevent venous reflux (evacuated tube contents flowing back into the vein) you should release the tourniquetA) after the needle is in the vein but before the first tube is engaged.B) while the first tube is filling.C) while the last tube is filling.D) after the needle is removed from the vein.
What will be an ideal response?
B, C
Removing the tourniquet while any of the tubes are filling (first, middle, or last) prevents venous reflux. A completely full tube should not be still engaged when the tourniquet is removed.
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