title: Doppler ultrasonographic indices after renal transplantation as renal function predictors.
abstract: OBJECTIVE
  Doppler ultrasonography is mostly used for assessment of both graft and native kidney vascular status. In this study, correlation between Doppler sonographic indices and transplanted kidney function was evaluated.
  
  
  METHODS
  In our retrospective study, we reviewed data on 273 renal transplanted (RTx) patients. The Doppler ultrasonographic evaluation included resistive index (RI), pulsatility index (PI) in interlobar arteries as well as stenosis (TRAS) or thrombosis of renal arteries and veins. Serum creatinine (Cr) and cyclosporine levels (CsA) were measured just prior to sonography.
  
  
  RESULTS
  The mean age of 154 male and 119 female patients was 36.67 +/- 13.13 years. Both RI and PI showed significant linear correlations with serum Cr (P = .033 and P = .002, respectively). Also, direct linear correlations existed between patient age and RI and PI values (P = .004; r = +.174 and P = .003; r = +.183 respectively). The prevalence of TRAS was 11.35%. Among patients with TRAS or thrombosis the mean Cr level (2.08 +/- 1.7 mg/dL) was significantly higher than that among patients without TRAS or thrombosis (1.48 +/- 0.97 mg/dL; P = .004). Despite this finding, RI and PI were significantly lower among patients with TRAS or thrombosis than those with a patent renovascular tributary (0.59 +/- 0.15 vs 0.65 +/- 0.11; P = .029 vs 1.02 +/- 0.40 vs 1.18 +/- 0.46; P = .049).
  
  
  CONCLUSIONS
  Both RI and PI were two valuable Doppler ultrasonographic markers to evaluate renal allograft function and related vascular complications.
authors.affiliation: Drug Applied Research Center, Tabriz University of Medical Science, Tabriz, East Azerbaijan Iran. Dr.Nezami@gmail.com
authors.forename: N
authors.initials: N
authors.lastname: Nezami
authors.forename: M K
authors.initials: MK
authors.lastname: Tarzamni
authors.forename: H
authors.initials: H
authors.lastname: Argani
authors.forename: M
authors.initials: M
authors.lastname: Nourifar
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003404:Creatinine / Q000097:blood; D005260:Female; D006801:Humans; D007166:Immunosuppressive Agents / Q000627:therapeutic use; D007677:Kidney Function Tests; D016030:Kidney Transplantation / Q000276:immunology / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012044:Regression Analysis; D012077:Renal Artery / Q000000981:diagnostic imaging; D012082:Renal Veins / Q000000981:diagnostic imaging; D012189:Retrospective Studies; D018608:Ultrasonography, Doppler
chemical_list: D007166:Immunosuppressive Agents; D003404:Creatinine