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.
Renal infections. CT scan is the preferred test to detect renal infections as it can help in identifying gas, stones, calcifications (stone-like calcium deposits) within the kidney, bleeding, abscesses and obstruction. Renal stones. CT scan is the best way to assess for stone disease. Even though IVU may be utilized sometimes, it is not as sensitive as the CT scan. Renal masses. Ultrasound and CT scan are complimentary in evaluating a renal mass of any kind. These two modalities can be used effectively to identify a cystic lesion, mass or renal cell carcinoma (cancer).