Tests for renal artery stenosis include color Doppler ultrasound, spiral CT angiography, magnetic resonance angiography and renal artery angiography.
1. Ultrasound: Color Doppler ultrasound can observe the changes of intrarenal blood flow within the main trunk of the renal artery, thus providing indirect information about renal artery stenosis, which is especially sensitive to renal artery stenosis caused by fibromuscular dysplasia.
2. Spiral CT angiography: Spiral CT angiography is less time-consuming, can clearly show the image of renal artery and renal parenchyma, has high spatial resolution, and can be three-dimensional imaging, which has high sensitivity and specificity for the diagnosis of renal artery stenosis, however, the degree of renal artery stenosis shown by spiral CT angiography may be heavier than the actual situation.
3. Magnetic resonance angiography: Magnetic resonance angiography has high specificity and sensitivity for renal artery stenosis.
4. Renal artery angiography: when non-invasive means of examination cannot make a clear diagnosis, percutaneous intubation is required to do aorto-renal arteriography and selective renal arteriography, which can accurately show the location, scope, degree of renal artery stenosis and the formation of collateral circulation, and it is the “gold standard” for the diagnosis of renal artery stenosis.
Renal artery stenosis may also have other detection methods, if the patient found renal artery stenosis, it is recommended to go to a regular hospital in time, under the guidance of the doctor standardized treatment.