[Preoperative tests of blood, body fluids and electrolytes].
D001774:Blood Chemical Analysis; D001795:Blood Pressure Determination; D001811:Blood Volume Determination; D001826:Body Fluids / Q000032:analysis*; D004573:Electrolytes / Q000097:blood*; D006801:Humans; D013514:Surgical Procedures, Operative
D004573:Electrolytes