title: [Determination of creatinine in drained liquid. Urinary leak or lymphocele?].
abstract: BACKGROUND
  Liquid collections around the renal graft that are displayed in 51% of cases implicate a diagnostic challenge and a risk for graft function. We undertook this study to determine the usefulness of creatinine concentration measurement in drainage in patients with renal transplantation.
  
  
  METHODS
  We selected patients with surgically corrected urinary leak and patients with lymphocele from November 1, 1999, to November 30, 2008, in whom we determined the creatinine concentration in liquid drainage, plasma and urine.
  
  
  RESULTS
  We included five patients with urinary leak and six patients with lymphocele. Two patients had urinary leak before the lymphocele. The t value of the plasma creatinine (Pcreat), drainage (Dcreat) and urine (Ucreat) was 0.89, 0.045 and 0.63, respectively. The diagnostic criteria of urinary leak represented a value between the creatinine of the drainage and plasma (D/Pcreat) >6, between urine and drainage (U/Dcreat) <3 and between urine and plasma (U/ Pcreat) <7. When we compared both groups the χ(2) values were 0.018, 0.007 and 0.094, respectively.
  
  
  CONCLUSIONS
  There is a statistically significant difference among the creatinine drainage liquid values. Our study shows that D/Pcreat ratio >6 after the first week or U/Dcreat ratio <3 at any time during the postoperative period represents a six-times higher possibility of urinary leak.
authors.affiliation: Servicio de Cirugía de Trasplante, Instituto Mexicano de Transplantes, Cuernavaca, Morelos, Mexico.
authors.forename: Francisco
authors.initials: F
authors.lastname: Flores-Gama
authors.forename: Tommaso
authors.initials: T
authors.lastname: Bochicchio-Riccardelli
authors.forename: Guillermo
authors.initials: G
authors.lastname: Mondragón-Ramírez
mesh_terms: D000328:Adult; D001826:Body Fluids / Q000737:chemistry*; D003404:Creatinine / Q000032:analysis* / Q000097:blood / Q000652:urine; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007431:Intraoperative Complications / Q000175:diagnosis / Q000378:metabolism; D016030:Kidney Transplantation / Q000009:adverse effects; D008196:Lymph / Q000737:chemistry*; D008210:Lymphocele / Q000175:diagnosis* / Q000209:etiology / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D009336:Necrosis; D011183:Postoperative Complications / Q000175:diagnosis* / Q000378:metabolism; D013529:Surgical Wound Dehiscence / Q000175:diagnosis* / Q000378:metabolism; D014513:Ureter / Q000473:pathology / Q000601:surgery; D001743:Urinary Bladder / Q000293:injuries; D014556:Urine / Q000737:chemistry*; D055815:Young Adult
chemical_list: D003404:Creatinine