The Impact of Perioperative Transfusion on Postoperative Cognitive Dysfunction

Exclusion Criteria

• •If patients have anemia (Hb is less than 13 g / dL for men and less than 12 g / dL for women)
• •Those who cannot read the agreement (illiteracy, foreigner, etc.)
• •Have a history of taking medication for mental illness
• •Communication disorders due to neurological diseases (dementia, stroke, seizures, etc.)
• •Less than 23 points on K-MoCA test
• •When fluid loading and volulyte are difficult due to kidney disease
• •Limited blood transfusion due to heart disease
• •Refusal of blood transfusions (religious reasons, etc.)
• •patients who have received a blood transfusion within 6 weeks prior to surgery
• •If continuous observation is impossible after surgery
• •Emergency surgery