Renal artery stenosis is stenosis or narrowing of the renal artery that feeds the kidney. The renal artery is connected to the abdominal aorta. The blood downstream of the narrowed spot that goes to the organ is at lower pressure. This is sensed by the kidney.
Since the vital role of the kidney is to detect and help maintain healthy blood pressure, the organ then tries to raise blood pressure throughout the body. Inside the kidney, there are millions of nephrons, each of which helps to filter the blood and then fine-tunes the composition of blood by carefully reabsorbing and secreting electrolytes as the fluid passes through various parts of the nephron. Blood approaches the nephron via the afferent arteriole. The efferent arteriole goes on to split into another set of capillaries- the vasa recta. This surrounds the nephron and then blood leaves via the venue. To better understand the case, let us also take note of occlusion aside from stenosis.
Causes
Occlusion
Occlusion of the renal artery can happen either because of a thrombus, which is a blood clot that can arise in the renal artery itself. This also happens because of emboli. This is a blood clot that moves from the origin, which is frequently the heart. This goes to the renal artery. This causes complete blockage.
Stenosis
90% of the time, stenosis happens because of atherosclerosis. These are fatty flocks that develop in the hard reso. These build up and cause all the stenosis of the renal artery. This case usually happens to older male patients. The rest of this case is due to fibromuscular dysplasia. This is a commonly tested item even though it’s only 10%. Fibromuscular dysplasia is the thickening of the wall that causes stenosis, which is common to a young female.