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Doppler sonographic resistive index in obstructed kidneys
1Department of Diagnostic Radiology, Seoul National University College of Medicine, Korea.
Summary
Doppler sonography shows low sensitivity for diagnosing unilateral renal obstruction. However, it may aid in identifying acute, severe cases with characteristic symptoms and imaging findings.
Area of Science:
- Nephrology
- Radiology
- Medical Imaging
Background:
- Unilateral renal obstruction diagnosis can be challenging.
- Doppler sonography is a non-invasive imaging technique.
- Assessing renal blood flow may indicate obstruction severity.
Purpose of the Study:
- To evaluate the correlation between Doppler sonographic findings and clinical presentation in unilateral renal obstruction.
- To determine the diagnostic accuracy of Doppler sonography for unilateral renal obstruction.
Main Methods:
- Correlating Doppler sonographic resistive index with symptom duration and intravenous urography findings.
- Analyzing sensitivity and specificity of resistive index cutoff values.
- Study included 31 patients with unilateral renal obstruction and 30 controls.
Main Results:
- No significant correlation found between resistive index and symptom duration or pelvicalyceal opacification time.
- Overall sensitivity for diagnosing unilateral obstruction was 19.3% with a resistive index cutoff of 0.7.
- Sensitivity increased to 80% in patients with acute symptoms and severe obstruction.
Conclusions:
- Doppler sonography demonstrates low overall sensitivity for unilateral renal obstruction.
- It may be a valuable tool for diagnosing acute and severe renal obstructions.
- Further research may refine its role in specific clinical scenarios.