title: Characterization of Urolithiasis in Patients Following Lower Urinary Tract Reconstruction with Intestinal Segments.
abstract: Urinary diversion and augmentation cystoplasty are associated with long-term complications, including metabolic derangements, infectious complications, and urolithiasis. The aim of this series was to characterize upper and lower urinary tract (LUT) calculi in this population.
  
  
  
  A retrospective chart review was performed on all patients with a history of urinary diversion or augmentation cystoplasty who subsequently underwent treatment for urolithiasis between January 1998 and May 2015. Data collected included demographics, perioperative characteristics, type of reconstructive procedure, urine culture, stone analysis, and metabolic evaluation. A statistical analysis was performed.
  
  
  
  Ninety-nine patients were identified with a history of urolithiasis and incontinent urinary diversion (28), neobladder (21), continent cutaneous diversion (12), and augmentation cystoplasty (38). LUT stones were more common than upper tract stones in all except for incontinent diversions, which only had one lower tract stone (p = 0.0001). Twenty-three percent of stones were metabolic. Several metabolic derangements were noted, including hypocitraturia (100%), elevated urine pH (100%), low urine volume (70%), and hyperoxaluria (35%). There was a 44% rate of recurrent urolithiasis.
  
  
  
  Given the high rate of stone recurrence among patients with a history of urinary diversion and augmentation cystoplasty, all measures should be taken to prevent recurrent stones. In addition to actions aimed to prevent infectious stones such as bladder and pouch irrigation, we recommend these patients undergo a full metabolic workup with targeted dietary changes and medical therapies.
authors.affiliation: Department of Urologic Surgery, Vanderbilt University Medical Center , Nashville, Tennessee.
authors.forename: Tracy
authors.initials: T
authors.lastname: Marien
authors.affiliation: Department of Urologic Surgery, Vanderbilt University Medical Center , Nashville, Tennessee.
authors.forename: Jennifer
authors.initials: J
authors.lastname: Robles
authors.affiliation: Department of Urologic Surgery, Vanderbilt University Medical Center , Nashville, Tennessee.
authors.forename: Trisha M
authors.initials: TM
authors.lastname: Kammann
authors.affiliation: Department of Urologic Surgery, Vanderbilt University Medical Center , Nashville, Tennessee.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Kadihasanoglu
authors.affiliation: Department of Urologic Surgery, Vanderbilt University Medical Center , Nashville, Tennessee.
authors.forename: Davis P
authors.initials: DP
authors.lastname: Viprakasit
authors.affiliation: Department of Urologic Surgery, Vanderbilt University Medical Center , Nashville, Tennessee.
authors.forename: S Duke
authors.initials: SD
authors.lastname: Herrell
authors.affiliation: Department of Urologic Surgery, Vanderbilt University Medical Center , Nashville, Tennessee.
authors.forename: Nicole L
authors.initials: NL
authors.lastname: Miller
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D053715:Cystotomy / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007422:Intestines / Q000637:transplantation*; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000453:epidemiology*; D019651:Plastic Surgery Procedures / Q000009:adverse effects*; D012008:Recurrence; D012189:Retrospective Studies; D014545:Urinary Calculi / Q000453:epidemiology* / Q000209:etiology; D014547:Urinary Diversion / Q000009:adverse effects*; D055815:Young Adult
keywords: augmentation cystoplasty; bladder stone; kidney stones; urinary diversion; urolithiasis