Misdiagnosis of the disease often occurs and causes considerable distress to patients. In fact, there are many steps to confirm the diagnosis of sepsis, so how can we accurately confirm whether it is sepsis or not? Then you may want to try the following methods. 1, blood picture Total white blood cell count is mostly significantly higher, up to 10-30 × 109 / L, neutrophil percentage increased, more than 80%, can appear obvious nuclear left shift and intracellular poisoning particles, a few gram-negative sepsis and the organism immune function of the total number of white blood cells can be normal or slightly reduced. 2, neutrophil tetrazolium blue (NBT) test This test is positive only in bacterial infections and can be as high as 20% or more (normal is below 8%), which helps to differentiate viral infections and non-infectious diseases from bacterial infections. 3, laboratory tests (1) blood leukocytes and neutrophils significantly increased, often with obvious nuclear lobes left shift and leukocyte poisoning particles, acidic granulocytes decreased or disappeared. The total number of leukocytes may be normal or reduced in old and frail people or those with low body response and some gram-negative bacterial infections. (2) Positive blood and bone marrow cultures. If it is consistent with the bacteria obtained from the culture of local secretions (pus, urine, pleural fluid, brain crest fluid, etc.). Then the diagnosis can be confirmed. After reading the above methods you should understand the examination of sepsis, so it is recommended that you must be careful when confirming a certain condition, and also go to a regular hospital to do a regular and comprehensive examination, otherwise it will have a great impact on you.