Lupus anticoagulant test mainly looks at the lupus anticoagulant ratio, if the ratio is 1.4, it is higher than normal, and the cause of the disease needs to be further clarified, and then targeted to medication, surgery and other therapeutic measures. Lupus anticoagulant causes prolongation of the clotting time of the body, and the normal reference range of the ratio is 0.8~1.2. Abnormal results are associated with antiphospholipid syndrome, systemic lupus erythematosus, and arterial and venous embolism, and the patient should be alerted to the adverse outcome of pregnancy if she is a pregnant woman. It is also seen in normal subjects and in patients with malignant tumors and true erythrocytosis. Patients with lupus anticoagulant abnormalities need to further improve the blood sedimentation, autoantibodies, ultrasound and other relevant auxiliary examinations to further clarify the cause of the disease. For example, if the patient is diagnosed with antiphospholipid syndrome or autoimmune diseases such as systemic lupus erythematosus, the patient should be treated with immunosuppressive drugs such as methotrexate and anticoagulant drugs such as aspirin. It is important to note that the lupus anticoagulant ratio is also used for obstetric screening. Due to physiologic hypercoagulability in pregnancy, a lupus anticoagulant ratio higher than 1.1 is considered abnormal, and may indicate stillbirth, intrauterine dysplasia, and unexplained miscarriage, which may require prompt clarification of the cause of the disease and appropriate treatment such as cervical cerclage and progesterone injections. Drugs should be used under the guidance of a physician, and patients are advised to go to the rheumatology and immunology department, obstetrics and gynecology department and other related departments of regular hospitals for detailed consultation.