<qa>  What is the name of the method that involves removal of whole blood from a patient?ANH is an approach to blood conservation that involves removal of whole blood from a patient immediately prior to an operation that is likely to be associated with significant blood loss. Following blood removal, euvolemia is restored with crystalloid andor colloid. The harvested blood, which has a greater red cell mass than the blood lost intraoperatively, is re-infused as needed during the procedure or at the completion of the operation. ANH is more attractive than preoperative autologous blood donation for several reasons: it is technically and logistically much simpler, it requires no special equipment and costs less no storage or administrative costs, it is associated with a lower chance of administration error, it requires no obligate pre-operative delay and is not associated with a waste of autologous units. In addition, because coagulation factors are preserved and later re-infused, ANH may reduce the need for post-operative fresh frozen plasma FFP. Additionally, ANH may have an impact on low CVP anesthetic management during partial hepatectomy, which is standard at MSKCC and at many other centers. 