Ultrasound-estimated bladder weight in healthy children

Area of Science:

• Pediatric Urology
• Medical Imaging
• Biometry

Background:

• Accurate assessment of bladder weight is crucial for diagnosing pediatric bladder conditions.
• Traditional methods for estimating bladder weight are often invasive or lack precision.
• Ultrasonography offers a non-invasive approach, but requires accurate estimation formulas.

Purpose of the Study:

• To develop and validate a novel ultrasonographically-derived formula for estimating bladder weight in healthy children.
• To incorporate bladder shape variations into the weight estimation formula for improved accuracy.
• To establish a correlation between ultrasound-estimated bladder weight (UEBW) and children's age.

Main Methods:

• Ultrasonographic bladder examination was performed on 92 healthy children using a 5-MHz transducer.
• Bladders were categorized by shape (round, ellipsoid, cuboid, triangular, undefined), and three diameters were measured.
• A modified formula incorporating shape-specific correction coefficients was used to calculate UEBW. Linear regression analysis determined the relationship between UEBW and age.

Main Results:

• A statistically significant correlation (r=0.78, p<0.05) was found between UEBW and children's age.
• A simplified formula, UEBW = Age + 8.4, was derived for clinical use.
• The study successfully categorized bladder shapes and applied correction coefficients for accurate UEBW calculation.

Conclusions:

• The proposed simple formula allows for non-invasive, age-dependent calculation of normal ultrasound-estimated bladder weight in children.
• This method provides an objective and quantitative tool for assessing the degree of bladder wall hypertrophy.
• Further research is warranted to explore the utility of this method in detecting pathological bladder conditions.