Insertion | Blood Collection - MedSchool
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Blood Collection




  • No flashback (not in the vein) - try advancing further or pulling back and inserting slightly medially or laterally
  • Flashback but no blood coming out (penetrated too far, vein has collapsed) - pull back slightly, adjust the angle of the needle against the skin, pull back and try again
  • Bright red blood that is pulsating out (arterial sample) - remove the needle and place pressure for at least 3 minutes
  • Haematoma - remove the needle and apply pressure to the area.
Last updated on January 1st, 2018