General data
intraoperative blood loss, psychiatric, hematological system diseases, anemia
HYPOPROTEINEMIA, DISORDERS, ANEMIA, MYASTHENIA GRAVIS, INTRAOPERATIVE BLOOD LOSS, DISEASES
This study was approved by the Ethics Committee of Shanghai Pudong Gongli Hospital (2018 Gongli Hospital LSZ No. glll-26). All patients signed informed consent forms. A total of 60 cases of patients who were aged 65 to 75 years, weighed 55 to 80 kg, and who underwent ASA grade I to II elective spinal surgery were selected. The estimated intraoperative blood loss was ≥ 600 ml. None of the patients had hematological system diseases or anemia (Hb ≥ 110 g/L) and had hematocrit (Hct) ≥ 35%. They had good nutritional status, normal blood routine, normal liver and kidney function, and grade 1 to 2 cardiac function on examination. None of them had myasthenia gravis, hypoproteinemia, psychiatric disorders, or other diseases.