Shear wave elastography: usefulness in chronic kidney disease.

Area of Science:

• Nephrology
• Medical Imaging
• Biomarkers

Background:

• Chronic kidney disease (CKD) is a significant global health issue.
• Intra-renal fibrosis is a common pathway in CKD, correlating with disease severity.
• Shear wave elastography (SWE) offers non-invasive measurement of tissue stiffness.

Purpose of the Study:

• Evaluate Young's modulus from SWE as a biomarker for distinguishing normal from diseased kidneys.
• Correlate Young's modulus with Doppler findings and estimated glomerular filtration rate (eGFR).

Main Methods:

• Prospective study with initial phase: 50 CKD patients and 50 controls to establish median Young's modulus.
• Second phase: Cross-sectional study of 58 diabetic and 56 non-diabetic CKD patients using SWE and renal Doppler.
• Correlation analysis of SWE findings with eGFR and Doppler parameters across CKD stages.

Main Results:

• Renal cortex elasticity, measured by Young's modulus, was significantly reduced in CKD patients compared to controls.
• A significant correlation was observed between Young's modulus, eGFR, and renal resistive index.
• No significant difference in Young's modulus was found between diabetic and non-diabetic CKD groups.

Conclusions:

• Young's modulus correlates with eGFR, suggesting SWE's utility in indicating renal tissue injury in CKD.
• SWE can aid in CKD staging and provide supplementary diagnostic information, though it doesn't replace biopsy.
• SWE is a potentially low-cost diagnostic tool for CKD, despite not predicting disease etiology.