…A tourniquet left on during sampling raises the potassium, calcium and proteins. Fasting is required for triglycerides but not for cholesterol, nor for glucose when…

…Apply the tourniquet only after the block has taken effect, and note the time. It must not stay on for longer than 20–30 minutes…

…sizes, a tourniquet, chlorhexidine in alcohol 5 mg/mL, gauze, a transparent dressing, an extension set with a three way tap, and saline for flushing…