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Related Experiment Videos

Stones in enterocystoplasties

D E Nurse1, P D McInerney, P J Thomas

  • 1Department of Urology, Guy's Hospital, London, UK.

British Journal of Urology
|May 1, 1996
PubMed
Summary
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Urinary stasis, not infection, is the primary cause of bladder stones after urinary tract reconstruction. Avoiding clean intermittent self-catheterization (CISC) and promoting spontaneous voiding can reduce stone formation risk.

Area of Science:

  • Urology
  • Nephrology
  • Biomedical Engineering

Background:

  • Bladder stones are a known complication after urinary tract reconstruction.
  • Previous theories attributed stone formation to foreign materials or recurrent infections.

Purpose of the Study:

  • To investigate the primary causes of stone formation in patients with augmented or substituted bladders.
  • To compare the incidence of stones in different types of bladder reconstruction and urinary management.

Main Methods:

  • A retrospective study of 467 patients undergoing lower urinary tract reconstruction.
  • Follow-up for at least 3 years using videourodynamics and ultrasonography.

Main Results:

  • Stones were found in 9% of patients, often incidentally.

Related Experiment Videos

  • Patients using clean intermittent self-catheterization (CISC) had a 5-10 times higher risk of stone formation.
  • Continent diversions had a higher stone incidence (22%) compared to augmentation (6%) or substitution cystoplasty (7%).

    • Conclusions:

    • Urinary stasis is a more significant factor in stone formation than bacteriuria in cystoplasty patients.
    • Orthotopic cystoplasty and spontaneous voiding are preferred over continent diversion and CISC to minimize stone risk.
    • Periodic bladder washouts may offer an alternative preventive strategy.