Risk factors associated with blood transfusion in liver transplantation

Area of Science:

• Hepatology
• Transfusion Medicine
• Surgical Risk Assessment

Background:

• Liver transplantation (LT) is a complex procedure often requiring significant blood transfusions.
• Identifying preoperative and operative risk factors for red blood cell (RBC) transfusion is crucial for patient management and optimizing outcomes.

Purpose of the Study:

• To explore preoperative and operative risk factors associated with RBC transfusion requirements in liver transplant recipients.
• To identify predictors of RBC transfusion needs during and up to 24 hours after liver transplantation.

Main Methods:

• A log-binomial regression model was used to evaluate risk factors and RBC units transfused in 176 LT patients.
• Relative risk was adjusted for age, sex, Model for End-Stage Liver Disease (MELD) score, and baseline hemoglobin concentration.
• Key perioperative variables including graft type, reoperation for bleeding, ventilation duration, ICU stay, ascites, clot firmness, cold ischemia time, and post-reperfusion syndrome were analyzed.

Main Results:

• Higher MELD scores and lower baseline hemoglobin concentrations were significant predictors of increased RBC transfusion requirements.
• Ascites, longer cold ischemia time, and post-reperfusion syndrome were associated with higher transfusion volumes.
• Increased maximum clot firmness was linked to a lower likelihood of transfusion, while reoperation for bleeding, longer mechanical ventilation, and ICU stay were more frequent in transfused patients.

Conclusions:

• Preoperative correction of anemia should be a standard part of liver transplantation protocols.
• Further research should focus on interventions to prevent severe hypotension and fibrinolysis during graft reperfusion to reduce transfusion needs.