Incidence of Pouch Stones and Risk Factors for Urolithiasis in Patients Receiving Continent Diversion or Neobladder Using Intestine — Comparision with Ileal Conduit

Recently, the use of continent urinary reservoir (pouch) as a urinary drainage operative method has been spreading, leading to improved quality of life in patients undergoing total cystectomy1. Various methods of pouch operation have been devised2-4. The Rock pouch2 is a representative method, in which a high incidence of pouch stone formation has been reported5, 6. Although the use of metal staples and Marlex mesh is believed to promote stone formation, the structure of the pouch and deposits of intestinal mucus have also been implicated7, 8. Apart from these factors, no other risk factors for urolithiasis in patients with pouch stones have been identified. In the present study, risk factors and inhibiting factors for urolithiasis were retrospectively examined in patients undergoing the pouch operation or augumentation cystoplasty using the intestine, to explore the causes and mechanisms of pouch stone formation.