Complex urinary tract infection

Complicated urinary tract infections are: ① organic or functional abnormalities in the urinary tract that cause urinary tract obstruction and poor urinary flow; ② foreign bodies in the urinary tract, such as stones, indwelling urinary catheters; ③ obstruction in the kidney For example, urinary tract infections that occur on the basis of chronic renal parenchymal disease are mostly pyelonephritis, which can cause kidney tissue damage. Long-term repeated infections or incomplete treatment can progress to chronic renal failure (CRF).