title: Percutaneous nephrostomy performed on kidneys with a thin renal cortex: a retrospective study of daily urine output in 46 nephrostomy procedures.
abstract: OBJECTIVE
  This study investigated whether a thin renal cortex or any morphological kidney measurements can be predictors of post percutaneous nephrostomy (PCN) renal function, thereby lessening the need for the procedure.
  
  
  METHODS
  All patients underwent unilateral PCN that were performed under sonographic and fluoroscopic guidance. Kidney morphological measurements were subsequently taken to measure residual renal function; a thin renal cortex was defined from a computed tomography (CT) showing a cortical thickness <10 mm. Urine output was recorded daily, with patients divided into anuric and nonanuric groups.
  
  
  RESULTS
  Morphological measurements of residual renal function, such as renal length (p=0.004), renal width (p=0.004), renal thickness (p=0.008), and renal size (p=0.004) were significantly higher in nonanuric than anuric patients. Urine output increased by 85.47 ml/day for every millimetre increase in renal width (p=0.026) and 65.31 ml/day for every millimetre increase in renal thickness (p=0.024). Simple linear regression analyses showed that cancer patients had a significantly lower urine output (358.73 ml/day; p=0.046) than those without cancer.
  
  
  CONCLUSIONS
  This study showed that urine output and other clinical data can provide an index to evaluate residual renal function before deciding to perform PCN procedures.
authors.affiliation: Department of Diagnostic Radiology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, No.138, Shengli Rd., North Dist., Tainan, 704, Taiwan (R.O.C.).
authors.forename: Chia Hsing
authors.initials: CH
authors.lastname: Lu
authors.forename: Yi-Sheng
authors.initials: YS
authors.lastname: Liu
authors.forename: Hong-Ming
authors.initials: HM
authors.lastname: Tsai
authors.forename: Ming-Tsung
authors.initials: MT
authors.lastname: Chuang
authors.forename: Chiung-Yu
authors.initials: CY
authors.lastname: Chen
authors.forename: Yi-Shan
authors.initials: YS
authors.lastname: Tsai
mesh_terms: D000368:Aged; D005260:Female; D005471:Fluoroscopy; D006801:Humans; D007672:Kidney Cortex / Q000000981:diagnostic imaging*; D007674:Kidney Diseases / Q000175:diagnosis / Q000503:physiopathology* / Q000601:surgery*; D007677:Kidney Function Tests; D008297:Male; D008875:Middle Aged; D009403:Nephrostomy, Percutaneous / Q000379:methods*; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D018084:Ultrasonography, Interventional; D014554:Urination / Q000502:physiology*
references.citation: Indian J Nephrol. 2010 Apr;20(2):84-8
references.pmid: 20835322
references.citation: Ann Nucl Med. 2001 Jun;15(3):179-90
references.pmid: 11545186
references.citation: Semin Intervent Radiol. 2006 Jun;23(2):205-8
references.pmid: 21326764
references.citation: Hinyokika Kiyo. 2007 May;53(5):297-9
references.pmid: 17561713
references.citation: Arch Esp Urol. 2010 Jun;63(5):387-90
references.pmid: 20587844
references.citation: Semin Intervent Radiol. 2006 Sep;23(3):287-94
references.pmid: 21326775
references.citation: BMC Urol. 2009 Dec 23;9:19
references.pmid: 20030823
references.citation: Br J Radiol. 2009 Jul;82(979):571-6
references.pmid: 19153185
references.citation: Am J Physiol Renal Physiol. 2007 May;292(5):F1548-59
references.pmid: 17213464
references.citation: Rom J Morphol Embryol. 2011;52(4):1325-30
references.pmid: 22203941
references.citation: Br J Radiol. 2008 Aug;81(968):624-9
references.pmid: 18628331