http://www.apicareonline.com/obstetric-hemorrhage-anesthetic-implications-and-management/
BLOOD CONSERVATION STRATEGIES:74
Autologous blood transfusion:
In pregnanacy, concerns have been raised regarding placental insufficiency, whether the woman will make up her hemoglobin before delivery and whether the collected units will be sufficient in the event of major obstetric hemorrhage.75 Hence, the use of pre-autologous blood deposit is not recommended in pregnancy (exception being a mother who is Jehovah’s witness)76.
Intra operative cell salvage:
This technique is commonly being used in cardiac, orthopedic and vascular surgeries with relative reduction of blood transfusion by 39%.77 The use of cell salvage in peripartum hemorrhage is still controversial. The potential difficulty in bleeding mothers is the effective removal of amniotic fluid and degree of contamination with fetal red cells. Still, several bodies based on current evidence have endorsed cell salvage in obstetrics. Intraoperative cell salvage has an undisputed role in patients who refuse blood or blood component transfusion (Jehovah’s Witness) and in patients where massive blood loss is anticipated (placenta accreta, percreta)77