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.
noun. Psi is the twenty third letter of the Greek alphabet. An example of psi is Ï. Psi is the twenty third letter of the Greek alphabet. An example of psi is the average human blood pressure of 2.32 psi/1.55 psi which equates to 120/80.
Rating Newest Oldest. Best Answer: Psi means pounds (force) per square inch of area. In hydraulics and pneumatics it is usually referred to as gage pressure psig-which is the pressure in reference to atmospheric pressure (usually 14.7 psia) .