The phlebotomist is only allowed 2 attempts at drawing blood, after that they should ask the patient if someone else can try to obtain their blood before the third attempt is carried out. If they say no, then you cannot try again.Click to see full answer. Also, how many failed attempts at venipuncture are allowed? Unsuccessful venepuncture If two unsuccessful attempts at venepuncture have been made by one person, a further two attempts should be carried out by a second person, if the patient is consenting.Secondly, what is the rule for drawing patients that have had a mastectomy? The rule against drawing from the same side of a prior mastectomy is hard and fast: such draws require physician’s permission. The risk is that the body’s ability to fight an infection in the affected limb is compromised because of lymph node removal during mastectomy. Just so, what is the maximum number of venipuncture attempts? 1. The maximum number of venipunctures that shall be attempted is 9; 3 lab associates attempting 2-3 venipunctures each. 2. Attempt a finger stick (Not acceptable for Coagulation studies, Blood cultures, or for tests that may be altered by this collection method).What is the most common complication of phlebotomy?Hematoma: The most common complication of phlebotomy procedure. venipuncture on that vein. appear on the skin from rupturing of the capillaries due to the tourniquet being left on too long or too tight.