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.
Depreciation is a concept in accounting used to measure a reduction in the value of fixed assets, such as buildings, equipment, leasehold improvements, and vehicles. As these fixed assets are used in the course of a business' operations, they experience wear and their future value is reduced.
Depreciation expense records the value of depreciation that has been moved from the balance sheet and onto the income statement during the period. When fixed assets depreciate, a journal entry is made to credit, or increase, the amount of accumulated depreciation associated with the fixed asset. Simultaneously, an equivalent debit is made to increase the amount of depreciation expense for the period.