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Ultrasound Shear Wave Elastography: A Novel Method to Evaluate Bladder Pressure
Renea M Sturm1, Elizabeth B Yerkes1, Jennifer L Nicholas2
1Division of Urology, Ann and Robert H. Lurie Children's Hospital, Chicago, Illinois.
The Journal of Urology
|April 4, 2017
Summary
Ultrasound shear wave elastography shows promise for assessing bladder pressure in children, offering a non-invasive alternative to urodynamics. This method accurately reflects bladder storage pressure and differentiates between compliant and noncompliant bladders.
Area of Science:
- Pediatric Urology
- Biomedical Engineering
- Medical Imaging
Background:
- Children with bladder dysfunction face risks of kidney damage due to elevated bladder pressure.
- Urodynamics, the current standard for measuring bladder pressure, is invasive and requires catheterization.
Purpose of the Study:
- To evaluate ultrasound shear wave elastography (SWE) as a novel, non-invasive method for assessing bladder biomechanical properties.
- To determine if SWE can accurately measure bladder pressure and differentiate between compliant and noncompliant bladders in children.
Main Methods:
- Concurrent SWE and urodynamics were performed on pediatric subjects.
- SWE images of bladder walls were acquired at various filling volumes.
- Bladder cohorts were defined as compliant or noncompliant based on detrusor pressure.
Main Results:
- Mean shear wave speed in bladder walls significantly correlated with detrusor pressure during filling.
- Noncompliant bladders showed significantly increased shear wave speed compared to compliant bladders.
- Shear wave speed measurements were significantly correlated with bladder compliance.
Conclusions:
- Ultrasound shear wave elastography measurements correlate well with bladder storage pressure.
- SWE can distinguish between compliant and noncompliant bladders.
- SWE is a promising bedside tool for evaluating bladder dysfunction in children.