title: Changes of arterio-venous differences in pH and pCO2 by hemodialysis.
abstract: Normally the differences in arterial-venous pH (A-VpH) and veno-arterial pCO2 (V-ApCO2) are small and constant. This study deals with A-VpH and V-ApCO2 and their effect on arterial-venous saturation hemoglobin percentage (A-VSHb%) in uremic patients under hemodialysis (HD). In 17 uremic patients under HD with acetate, blood samples were collected anaerobically in heparinized syringes from artery (fistula) and vein (forearm without fistula) pre- and post-HD. In these samples pH, pCO2 and SHb% were determined and A-VpH, V-ApCO2 and A-VSHb% were estimated. Comparison between the values pre- and post-HD of A-VpH, V-ApCO2 and A-VSHb% shows that these three values were decreased significantly post-HD (p < 0.001). The correlation of all values (pre- and post-HD) of A-VpH and V-ApCO2 with that of A-VSHb% was significant and positive (r = 0.514 p < 0.01, r = 0.505 p < 0.01, respectively).
authors.affiliation: Nephrological Center, Aretaieon University Hospital, Athens, Greece.
authors.forename: B
authors.initials: B
authors.lastname: Agroyannis
authors.forename: H
authors.initials: H
authors.lastname: Tzanatos
authors.forename: I
authors.initials: I
authors.lastname: Konstadinidou
authors.forename: D
authors.initials: D
authors.lastname: Tsoutsos
authors.forename: G
authors.initials: G
authors.lastname: Tserkezis
authors.forename: E
authors.initials: E
authors.lastname: Logothetis
authors.forename: D
authors.initials: D
authors.lastname: Koutsikos
mesh_terms: D000328:Adult; D000368:Aged; D001158:Arteries; D002245:Carbon Dioxide / Q000097:blood*; D006454:Hemoglobins / Q000032:analysis; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008875:Middle Aged; D006435:Renal Dialysis; D014680:Veins
chemical_list: D006454:Hemoglobins; D002245:Carbon Dioxide