First report of using low-titer cold-stored type O whole blood in massive postpartum hemorrhage

BACKGROUND In cases of massive hemorrhage in the US military, improved outcomes have been reported with the use of warm, fresh whole blood transfusions. Cold-stored low-titer type O whole blood (LTOWB) has become the preferred product for resuscitation of severe bleeding in deployed surgical units. Reports of LTOWB use in civilian trauma are becoming more frequent. CASE REPORT We report our experience with emergency transfusion of LTOWB for a woman with massive postpartum hemorrhage. The patient had two previous cesarean section deliveries at term without complications. With her third elective cesarean section at term, blood loss during surgery was not excessive, but 3 to 4 hours later she had an estimated blood loss of 3600 mL. Despite measures to control the hemorrhage, she rapidly became hypotensive and tachycardic, and our massive transfusion protocol (MTP) was activated. The transfusion service had very recently incorporated LTOWB into Trauma Pack 1 of the MTP. She received two LTOWB units, after which her hemorrhaging ceased, blood pressure normalized, and she became alert. One hour later she received one unit of fresh frozen plasma and one unit of red blood cells (RBCs). The following morning she received one unit of crossmatched RBCs, for a hematocrit of 20.7%. She was discharged home on Day 4, and she remains healthy. CONCLUSIONS This is the first report of which we are aware of massive postpartum hemorrhage treated using LTOWB. Our positive experience leads us to speculate that this approach could have a role in massive obstetric hemorrhage.