Massive Transfusion Protocols in Obstetric Hemorrhage: Theory versus Reality

Area of Science:

• Obstetrics and Gynecology
• Hematology
• Critical Care Medicine

Background:

• Massive transfusion protocols (MTPs) are critical for managing severe obstetric hemorrhage.
• Existing MTPs often recommend fixed ratios of blood components, but optimal ratios remain debated.
• Variability in component use suggests a need for adaptable transfusion strategies.

Purpose of the Study:

• To evaluate the experience with a modified MTP in a high-volume obstetrical referral center.
• To analyze blood product utilization and maternal outcomes in patients undergoing massive transfusion.
• To determine if deviations from fixed MTP ratios are associated with favorable outcomes.

Main Methods:

• Retrospective chart review of patients with MTP activation from January 2014 to January 2020.
• Data collection included hemorrhage etiology, blood product units transfused, and maternal morbidity/mortality.
• Descriptive statistics were used to analyze transfusion patterns and outcomes.

Main Results:

• 62 patients activated MTP, with 97% receiving blood products.
• Uterine atony (34%) and placenta accreta spectrum (32%) were leading causes of hemorrhage.
• Mean transfusion included 6.5 PRBCs, 14.8 FFP/cryoprecipitate, and 8.3 platelets per patient.
• No maternal deaths were recorded.

Conclusions:

• Significant deviations from initial fixed MTP ratios for packed red blood cells, fresh frozen plasma, cryoprecipitate, and platelets were observed.
• These modified transfusion ratios were associated with universally favorable maternal outcomes.
• Rapid laboratory evaluation allows for safe, individualized adjustments to MTPs based on clinical response and hemorrhage etiology.