Table 2 Specific procedures for renal ultrasonography

1

Establishment of intravenous access

2

Select the appropriate probe, abdominal probe is recommended, obtain a standard long-axis view of the kidney, adjust the image depth, focus and frame rate

3

Entering contrast mode

4

The contrast agent was added to 5 ml saline according to the instructions and shaken well. The median elbow vein was injected with 0.02 ml/kg of contrast medium and 10 ml of saline washed through the tube (there are recommendations of 1.0–2.0 ml, which vary from unit to unit)

5

Simultaneous timing and image recording

6

Sampling sites (regions of interest): three each from the cortex, medulla and corticomedullary junctional zone (avoiding large vessels)

7

Image Acquisition and Analysis

8

Completion of contralateral nephrography in 20 min