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Bladder function in children with meningomyelocele: comparison of cine-fluoroscopy and urodynamics
Insights
Cystograms alone are unreliable for assessing pediatric bladder function. Urodynamics combined with fluoroscopy, focusing on residual urine and bladder outflow, provide better indicators of obstruction than sphincter electromyography.
Area of Science:
- Pediatric Urology
- Diagnostic Imaging
- Urodynamic Assessment
Background:
- Accurate assessment of bladder and voiding function in children is crucial for diagnosis and management.
- Traditional methods like cystography may not fully capture dynamic urodynamic processes.
Purpose of the Study:
- To evaluate the reliability of cine-fluoroscopy combined with urodynamics for assessing pediatric lower urinary tract function.
- To compare the diagnostic value of cystography, sphincter electromyography, and other fluoroscopic parameters in identifying detrusor function and outflow obstruction.
Main Methods:
- Sixty children underwent combined cine-fluoroscopy and urodynamic studies.
- Measurements included bladder and rectal pressure, and sphincter electromyography during filling and voiding.
- Analysis focused on comparing cystogram findings with urodynamic data and fluoroscopic observations.
Main Results:
- Cystography alone was found to be an unreliable indicator of detrusor function.
- Sphincter electromyography interpretation requires consideration of intra-abdominal pressure changes.
- Residual urine volume and bladder outflow appearance on fluoroscopy were superior to sphincter electromyography for detecting outflow obstruction.
Conclusions:
- Combined cine-fluoroscopy and urodynamics offer a more comprehensive assessment of pediatric lower urinary tract function.
- Residual urine estimation and fluoroscopic observation of bladder outflow are valuable tools for diagnosing obstruction.
- Relying solely on cystography or sphincter electromyography can lead to misinterpretation of bladder and voiding dynamics.
Abstract:
We have assessed 60 children on an outpatient basis with cine-fluoroscopy combined with urodynamics. Bladder and rectal pressure together with sphincter electromyography were measured during bladder filling under fluoroscopy, which was followed by measurement of rectal pressure and sphincter electromyography during voiding under fluoroscopy. Comparison of the x-ray studies and urodynamics showed that the cystogram alone was not a reliable indicator of ray studies and urodynamics showed that the cystogram along was not a reliable indicator of detrusor function. The sphincter electromyogram during voiding must be interpreted in the face of intra-abdominal pressure changes owing to straining or Credé's maneuver. Residual urine estimations and the appearance of the bladder outflow on fluoroscopy were better parameters of outflow obstruction than sphincter electromyography.