In nature, methane is produced by the anaerobic bacterial decomposition of vegetable matter under water (where it is sometimes called marsh gas or swamp gas). Wetlands are the major natural source of methane produced in this way.
What are the exams and tests for renal artery stenosis? Blood tests. Screening blood tests may be done as part of the general evaluation of high blood pressure and may include a complete blood count, electrolytes, kidney function tests, and a urinalysis. Imaging. Renal artery narrowing can be detected with ultrasound or computerized tomography angiography or arteriography.
Increased levels of both protein and blood cells indicate early signs of kidney disease. 5. Urea clearance test: This test is based on a comparison between the amount of urea in the blood and the amount of urea in urine. If the urea clearance is lower than the normal range (64-99 ml/min), it may indicate that the kidneys are not working properly. 6.