Early graft function and carboxyhemoglobin level in liver transplanted patients

Area of Science:

• Transplantation research
• Heme metabolism
• Graft function monitoring

Background:

• Heme-oxygenase-1 catalyzes hemoglobin, producing carbon monoxide, a vasodilator.
• Increased heme-oxygenase-1 expression and carbon monoxide production are observed in end-stage liver disease.
• This study investigates the correlation between carboxyhemoglobin levels and early graft function in liver transplant patients.

Purpose of the Study:

• To determine if carboxyhemoglobin levels correlate with early graft function following liver transplantation.
• To explore the potential of carboxyhemoglobin as a rapid biomarker for assessing liver graft function.

Main Methods:

• A retrospective study of 39 liver transplant patients.
• Measurement of oxyhemoglobin, carboxyhemoglobin, and methemoglobin levels at multiple perioperative time points.
• Recording of lactic acid, prothrombin time, partial thrombin time, total bilirubin, ammonia, and blood transfusion units.

Main Results:

• Carboxyhemoglobin levels significantly increased during the anhepatic phase, end of surgery, and ICU admission compared to preoperative levels.
• Changes in carboxyhemoglobin correlated positively with changes in total bilirubin and prothrombin time.
• No significant correlation was found between carboxyhemoglobin levels and lactic acid or blood transfusion units.

Conclusions:

• Perioperative carboxyhemoglobin level changes are significantly associated with liver graft function indicators like prothrombin time and total bilirubin.
• Carboxyhemoglobin may serve as an early, rapid, and simple marker for evaluating liver graft function post-transplant.