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...Venipuncture pre collection smoking physical activity stress during different time of day posture lying standing sitting haemoconcentraction prolong tourniquet handling specimen insufficient or excess anticoagulant inadequate mixing blood with pat identification error delay to transit lab room facilities venipunture chair bed collecting trays gloves needles holders sterile syrings venous tubes tourniquets antiseptices guase pads cm punture resistance disposal container ice refrigerator adhesive bandages warming devices test reference manual procedure identify the patient assess disposition diet exercise basal state equipment necessary supplies position put on apply tourniquent above ven site not too tightly no more than min should make a fist without pumping hand select vein median cubital cephalic extencive scaring from burns surgery mastectomy hematoma iv therapy below cannula fistula edematous...