title: [Late morphologic and hemodynamic changes in the splenic territory of patients with mansoni's hepatosplenic schistosomiasis after distal splenorenal shunt. (Ultrasonography-Doppler study)].
abstract: BACKGROUND
  The distal splenorenal anastomosis (Warren's operation) has been indicated for the treatment of high digestive bleeding caused by esophagic varices because it would ideally reduce the venous pressure in the cardiotuberositary territory without changing the mesenteric-portal venous flow. However, the changes it produce in the splenic territory have not been fully understood.
  
  
  OBJECTIVE
  To appraise the late morphologic and hemodynamic changes in the splenic territory produced by the distal splenorenal anastomosis in patients with portal hypertension due to mansoni's hepatosplenic schistosomiasis complicated by esophagic bleeding.
  
  
  METHODS
  Ultrasonography-Doppler study of the splenic region of 52 patients with portal hypertension due to mansoni's schistosomiasis and previous bleeding by esophagic varices. They were divided in two groups: 40 non operated upon and 12 with a distal splenorerenal anastomosis. The following parameters and indices were compared between the two groups: a) morphometric parameters (splenic artery and vein's diameter, splenic diameters (longitudinal, transversal and antero-posterior); b) velocimetric parameters of the splenic vessels (systolic peak velocity in the splenic artery, mean flow velocity in the splenic vein; c) biometric index of the spleen (longitudinal x transversal); volumetric index of the spleen (longitudinal x transversal x antero-posterior x 0,523); hemodynamic indices of the splenic artery's impedance: pulsatility and resistivity.
  
  
  RESULTS
  The patients with distal splenorenal anastomosis showed: a) reduction in splenic indices: volumetric (non operated 903,83 +/- 452, 77 cm / distal splenorenal anastomosis 482,32 +/- 208,02 cm (46,64%)) and biometric (non operated 138,14 +/- 51,89 cm /distal splenorenal anastomosis 94,83 +/- 39,83 cm (33,35%)); b) no change: splenic artery's diameter (non operated 0,57 +/- 0,16 cm/distal splenorenal anastomosis 0,57 +/- 0,23 cm); velocity in the splenic artery non operated 107 +/- 42,02 cm/seg/distal splenorenal anastomosis 89,81 +/- 41,20 cm/seg), resistivity (non operated 0,58 +/- 0,008/distal splenorenal anastomosis 0,56 +/- 0,06) and pulsatility (non operated 0,91 +/- 0,19/distal splenorenal anastomosis 0,86 +/- 0,15, splenic vein (non operated 1,10 +/- 0,30 cm/distal splenorenal anastomosis 1,19 +/- 0,29 cm); c) increase: mean flow velocity in the splenic vein (non operated 20,54 +/- 8,45 cm/seg/distal splenorenal anastomosis 27,83 +/- 9,29 cm/seg).
  
  
  CONCLUSIONS
  The comparison of the ultrasonography Doppler results of the two groups of patient (non operated and distal splenorenal anastomosis) showed that in patients with distal splenorenal anastomosis there was a decrease of the volume of spleen; increase in the mean flow velocity in the splenic vein; no changes in the morphologic and hemodinamyc parameters of the splenic artery neither in its velocimetric indices.
authors.affiliation: Grupo de Cirurgia do Fígado e Hepertensão Portal da Divisão de Clínicas Cirúrgica II do Hospital das Clínicas da Faculdade de Medicina, Universidade de São Paulo, RS, Brasil.
authors.forename: Azzo
authors.initials: A
authors.lastname: Widman
authors.forename: Ilka Regina Souza de
authors.initials: IR
authors.lastname: Oliveira
authors.forename: Manlio Bas lio
authors.initials: MB
authors.lastname: Speranzini
authors.forename: Giovanni Guido
authors.initials: GG
authors.lastname: Cerri
authors.forename: William Abr o
authors.initials: WA
authors.lastname: Saad
authors.forename: Joaquim
authors.initials: J
authors.lastname: Gama-Rodrigues
mesh_terms: D001783:Blood Flow Velocity; D006801:Humans; D006975:Hypertension, Portal / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000601:surgery; D008109:Liver Diseases, Parasitic / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000601:surgery; D011168:Portal System / Q000000981:diagnostic imaging / Q000503:physiopathology; D012555:Schistosomiasis mansoni / Q000000981:diagnostic imaging / Q000503:physiopathology*; D013158:Splenic Diseases / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000601:surgery; D013162:Splenic Vein / Q000000981:diagnostic imaging / Q000503:physiopathology; D013164:Splenorenal Shunt, Surgical / Q000009:adverse effects; D018608:Ultrasonography, Doppler