What does urine test negative mean?

When performing routine urine examination, if the examination results of some indicators are negative, it means that there is no such indicator in the urine. For example, red blood cells are negative, indicating that there is no hematuria in the urine, white blood cells are negative, indicating that there is no inflammation in the urine, ketone bodies are negative, indicating that there is no ketoacidosis, urine sugar is negative, indicating that there is no abnormality of glucose metabolism, nitrite is negative, It shows that there is no Gram-negative bacilli infection in the urinary system, etc. When performing routine urine examination, it is necessary to comprehensively observe various indicators, combine other examination results, comprehensively judge the condition according to the patient's clinical symptoms, and then take targeted treatment measures.