Urinary tract obstruction

Through the renal parenchymal blood, through the filtering effect of the kidney, the waste produced by the metabolism in the blood and a part of the water form urine, and are excreted through the renal pelvis, ureter, bladder and urethra. Generally speaking, the urinary tract refers to the path of urine drainage and discharge from the renal pelvis to the outer urethra. Various lesions in any part of this pathway affect the drainage and excretion of urine, which will cause urinary tract obstruction.