title: [Urolithiasis and pregnancy. Presentation of results and management norm at the National Institute of Perinatology].
abstract: OBJECTIVE
  Urolithiasis associated to pregnancy has an incidence of 1:1,500. It is more frequent in multiparity patients and is a risk factor for preterm labor in more than 40%.
  
  
  OBJECTIVE
  To know the incidence of urolithiasis associated to pregnancy at the National Institute of Perinatology; to determine the prevalence of: symptoms and signs, hydronephrosis, urinary tract infections, uropathogens, use of catheters and perinatals results.
  
  
  METHODS
  A cohort study was made from January 1998 to October 2003, to identify pregnant patients with urolithiasis. The clinical files were reviewed; Fisher's exact test was used for statistical analysis.
  
  
  RESULTS
  Twenty-one patients were diagnosed with urolithiasis; 71% had lumbar pain; 57.1% hematuria; 47.6% bilateral urolithiasis; and 33% bilateral hydronephrosis. All the patients who had lumbar pain, hematuria or were catheterized developed urinary tract infection, even with antibiotics prophylaxis. The 52.4% had at least one urinary tract infection episode. The average gestational age at birth was 38.5 weeks (+/- 5.6 weeks). The 84.22% were preterm births.
  
  
  CONCLUSIONS
  Our incidence is similar to the one reported in the literature. The 71.26% has at least one of the symptoms from the classic triad of urolithiasis. The prevalence of urinary tract infection in these patients is very high therefore; antibiotics prophylaxis and urine cultures are required. A lower prevalence of preterm births was obtained. A flow chart for diagnosis and follow-up was presented in order to decrease and to face the possible complications of this pathologic entity.
authors.affiliation: Uroginecólogo de la Clínica de Urodinamia Ginecológica, Hospital Angeles del Pedregal.
authors.forename: Luis Eduardo
authors.initials: LE
authors.lastname: Romero Nava
authors.forename: María del Pilar
authors.initials: Mdel P
authors.lastname: Velázquez Sánchez
authors.forename: Jorge Ralph
authors.initials: JR
authors.lastname: Kunhardt Rasch
mesh_terms: D000328:Adult; D015331:Cohort Studies; D003663:Decision Trees; D005260:Female; D006801:Humans; D015994:Incidence; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis / Q000453:epidemiology* / Q000628:therapy; D015995:Prevalence; D014545:Urinary Calculi / Q000150:complications / Q000175:diagnosis / Q000453:epidemiology* / Q000628:therapy