title: Influence of renal artery blood flow on renal function during aortic surgery.
abstract: BACKGROUND
  This study was undertaken to determine the true incidence of renal impairment after aortic surgery and its association with intraoperative fluctuations in renal artery blood flow and cardiac output.
  
  
  METHODS
  Direct measurements of renal artery blood flow were undertaken with electromagnetic flowmetry in 19 patients undergoing elective infrarenal aortic surgery. Renal function was assessed before and after operation by measurement of creatinine clearance.
  
  
  RESULTS
  Twelve patients (63%) had renal impairment as defined by a 40% or greater reduction in creatinine clearance after operation. This group of patients had significantly lower renal artery blood flow during the period of aortic cross-clamping than had those who preserved their renal function (p < 0.001).
  
  
  CONCLUSIONS
  Renal impairment is common after infrarenal aortic surgery and may be a result of intraoperative ischemia secondary to reduced renal artery blood flow.
authors.affiliation: Department of Vascular Surgery, Manchester Royal Infirmary, United Kingdom.
authors.forename: M
authors.initials: M
authors.lastname: Welch
authors.forename: D G
authors.initials: DG
authors.lastname: Knight
authors.forename: H M
authors.initials: HM
authors.lastname: Carr
authors.forename: J V
authors.initials: JV
authors.lastname: Smyth
authors.forename: M G
authors.initials: MG
authors.lastname: Walker
mesh_terms: D000328:Adult; D000368:Aged; D001011:Aorta / Q000601:surgery*; D005260:Female; D006801:Humans; D007668:Kidney / Q000503:physiopathology*; D007674:Kidney Diseases / Q000209:etiology; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000209:etiology; D011446:Prospective Studies; D012077:Renal Artery / Q000502:physiology*; D012079:Renal Circulation