After a patient is hospitalized, the examination items vary depending on the patient’s condition. General routine examination items include: blood tests, routine blood tests including red blood cells, white blood cells, platelets, hemoglobin, lymphocytes, neutrophils, clotting time, and prothrombin time. Biochemical examination, including liver function, kidney function, blood ion, blood sugar, D-dimer, etc., syphilis, AIDS, hepatitis A, B and C infectious disease examination, urine routine and stool routine examination. Physical examinations, including chest X-ray, ECG, ultrasound, hemogram, gastrointestinal fluoroscopy and other items. We briefly introduce the examination of several specialized departments. Brain surgery and neurology have EEG, electromyography, cerebral hemogram, etc.; respiratory department can check sputum culture, pulmonary function and other items; urology department can check cystoscopy, renal puncture, kidney disease and other items. The examinations of each specialty are conducted according to the patient’s condition, and the necessary examinations are beneficial to the patient’s treatment.