[header] How to draw an arterial blood gas [title] Keep an ice pack ready and labelled with the patient's name. [step] Arterial blood is prone for clotting and needs to be put in an ice pack as soon as it is drawn. [title] Take a 2cc syringe and load about 0.2cc of heparin solution in it. 
[step] Heparin prevents clotting but too much of it can interfere with the results. [title] Check the radial pulsation of the patient.