Delayed excretion of bromosulfophthalein is an indicator of abnormal liver function with increased serum alkaline phosphatase activity, delayed excretion of bromosulfophthalein, decreased plasma albumin, prolonged prothrombin time, and elevated indirect bilirubin abnormal globulin. Abnormal liver function is when the liver is damaged by certain pathogenic factors that can cause damage to the morphological structure of the liver and abnormalities in the metabolism of liver function. What are the tests for abnormal liver function? 1. Ultrasound for liver disease Ultrasound is a medical test that patients are often exposed to during their visits. Ultrasound of the liver helps to help diagnose liver diseases. b-mode ultrasound is the most common method of modern medical imaging diagnosis and has an important position in the diagnosis of liver diseases and some other diseases. 2.CT examination of liver, gallbladder and spleen CT examination of liver, gallbladder and spleen is a method to examine liver, gallbladder and spleen by CT. It is mainly used to diagnose diseases of the liver, gallbladder and spleen. It is suitable for patients with diseases in these areas. 3.General radiography X-rays are mainly used to detect lesions in the bones, but they are also quite useful for detecting lesions in the soft tissues. Common examples are chest X-rays, which are used to diagnose lung disease. General radiographs can be taken for cranial films, chest films, abdominal plain films, and bone and joint films of the extremities. Radiographs occupy an important place in diagnostic work and have the following advantages over fluoroscopy: images of the examined area are permanently retained on film for analysis, discussion and review of controls; they can be kept as scientific research material; and radiographs can show microscopic structures, such as early sources of disease above 2 mm that are clearer than fluoroscopy. Radiography can examine thicker parts of the body and enable patients to receive less X-rays. 4.Liver function test Liver function test is to detect the indicators related to liver function and metabolism through various biochemical tests to reflect the basic condition of liver function. Protein tests related to liver function include serum total protein, albumin to globulin ratio, serum turbidity and flocculence test and methemoglobin test, etc.; serum enzymes related to liver disease include glutathione aminotransferase, glutamic oxalacetic aminotransferase, alkaline phosphatase and lactate dehydrogenase, etc.; tests related to biotransformation and excretion include sulfobromophthalein sodium retention test, etc.; tests related to bile pigment metabolism, such as bilirubin quantification and urinary triple bile test, etc. etc. 5.Liver fibrosis index tests Liver fibrosis index tests include PCIII (type III precollagen), IV-C (type IV collagen), LN (laminin), HA (hyaluronidase), CG (glycopyrrolate), PLD (prolyl peptidase), MAO (monoamine oxidase), PⅠNP (type I precollagen aminopeptidogen). The liver fibrosis index test is an assessment of the degree of liver fibrosis in chronic liver disease, and early detection of liver fibrosis is helpful to curb the progression of hepatitis B to a worse direction.