Assuming, whether because of obesity or any other factor, a suitable vein can be accessed in the patient's army, even with the tightening of the tourniquet, and a warm damp cloth on the site where blood would normally be drawn [heat dilates veins and makes them more prominent] has not helped, then the next option is the top of the hand, where veins are usually more easily accesible, even on overweight indivdiduals. Feet also can provide...
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