Grouping and treatment
hemodilution
BLOOD
The patients were randomized into two groups using the random number table: the ANH group that received moderate acute normovolemic hemodilution and the routine control group that received no hemodilution. In the ANH group, blood was removed through the radial artery from patients at a speed of 200 mL/10 min after stably inducing anesthesia. The formula of blood volume collected is as follows:Blood volume collected = estimated blood volume (EBV) × 2 × (HctHct