When you hire an electrician, even for a small job like installing a light switch, be aware that most charge a minimum fee for a visit. But that fee will roll into the cost of the job. In other words, although an electrician may charge $70 just to walk in the door, that money might cover the first hour of work. The cost of the job will vary depending on the complexity and parts needed. One factor that often contributes to a job's complexity is access.
1 Kidney stones. Large kidney stones cannot enter the ureter but a stone less than 5mm in diameter can cause a sudden obstruction.  Blood clots may obstruct the ureter and this is usually seen with massive hematuria (blood in the urine). Bleeding in these cases may be due to tumors, papillary necrosis or kidney stones.
Extrinsic Obstruction of the Ureter. The ureter is a thick-walled tube that transfers urine from the kidney to the bladder. It is approximately 10 inches long, with the upper half located in the abdomen and the lower half in the pelvic region.xtrinsic obstruction of the ureter is a condition caused by organs and diseases that press against the ureter and cause a blockage within the ureter. The resulting blockage affects the flow of urine out of the ureter and can eventually cause urine to build up, which can injure the kidney.