Research (STONE)
STONE Resources
Scanning Technique
- Pt should be supine or lateral decubitus position using curvilinear probe
- Scan in 2 planes: Transverse and longitudinal
- Scan through all tissue planes from superior pole to inferior pole
- Scan both kidneys for comparison
- Scan bladder for UVJ/bladder stones and ureteral jets
What to look for
- Goal of bedisde US is not to detect stones themselves (although they can be seen)
- Looking for evidence of stones (obstruction): Hydronephrosis
Mild Hydronephrosis
- Isolated fluid in the renal sinus
- Confirm that fluid is not vasculature by using color doppler: no flow
Moderate Hydronephrosis
- Confluent regions of fluid in the renal sinus
- "Bear Claw"
Severe Hydronephrosis
- Confluent mass of fluid
- Effacement of medulla or renal cortex