Effect of Perioperative Roxadustat in Elective Lumbar Interbody Fusion Surgery.

Roxadustat is an oral hypoxia-inducible factor prolyl-hydroxylase inhibitor (HIF-PHI) used to treat anemia. Participants in the Roxadustat group will receive 100mg of Roxadustat orally three times per week for three weeks (two weeks prior to surgery and one week post-surgery). The dosage may be adjusted based on hemoglobin levels during the perioperative period: if hemoglobin rises above 150g/L, the drug will be stopped; if hemoglobin increases by more than 20g/L from baseline but is still below 130g/L, the dosage will be reduced to 70mg; if hemoglobin drops by more than 20g/L from baseline, the dosage will be increased to 120mg.