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.
The American Diabetes Association recommends three tests to check for kidney damage. These tests are blood pressure, urine albumin, and a creatinine blood test to calculate an estimated glomerular filtration rate (eGFR). Creatinine is a waste product that is filtered out of the blood by healthy kidneys.