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.
Your doctor will start by taking a medical history and asking what may have caused the appearance of blood in your urine. This will be followed by a test called urinalysis. In this test, a urine sample is analyzed. Urine tests may include urine cytology, which uses a microscope to look for abnormal cells in the urine. Blood tests may also be ordered. If blood contains high levels of wastes that kidneys are supposed to remove, it could be a sign of kidney disease. In addition to urine and blood tests, you may need additional imaging tests. These may include: Computed tomography (CT) scan.