A blockage in the urinary tract can cause leukocytes to appear in the urine. This is often accompanied by blood in the urine. Trauma to the pelvis, a pelvis tumor, bladder or kidney stones, unwanted objects in the urinary tract or prostate hypertrophy can cause a blockage that damages the urinary system.ladder infections or inflammation of the urinary tract and ureters can also cause leukocytes to appear in the urine. Sexual intercourse can cause the transfer of bacteria that can cause an infection to form in the urinary tract.
The definition of a residual is something left over after other things have been used, subtracted or removed. An example of residual is the paint which left over after all the rooms in a house have been painted.
Loosely speaking, a residual is the error in a result. To be precise, suppose we want to find x such that =. Given an approximation x 0 of x, the residual is â whereas the error is â If the exact value of x is not known, the residual can be computed, whereas the error cannot. Residual of the approximation of a function Similar terminology is used dealing with differential, integral and functional equations. For the approximation of the solution of the equation