title: Bioelectric impedance in the estimation of hemodynamic and fluid status in dialysis patients.
abstract: In order to estimate the hemodynamic and fluid changes, "dry body weight" and intradialytic stability, electric bioimpedance cardiography was performed in 37 dialysis patients during dialysis procedure, i.e. before, at 2 h and after dialysis. The following parameters were estimated: systemic vascular resistance index-fl. Ohm/m2 (SVRI), mean arterial pressure-Torr (MAP), thoracic fluid conductivity/Ohm (TFC), cardiac index-L/min/m2 (CI), left cardiac work index-kg m/m2 (LCWI) and ejection fraction % (EF). Results were compared with changes in total body water estimated by the urea kinetic model (UKM). The patients were divided into three groups: normotensive (n = 12), hypertensive (n = 15) and hypotensive (n = 10). EF was increased in all the three groups, but only in hypotensives this change was significant (from 40.5 +/- 9.1 to 50.2 +/- 5.41, p < 0.01). The changes in other hemodynamic parameters (CI, LCWI, SVRI) did not reach statistical significance. TFC decreased significantly in all the three groups: normotensive from 0.056 +/- 0.009 to 0.048 +/- 0.009 (p < 0.001), hypotensive from 0.043 +/- 0.009 to 0.035 +/- 0.058 (p < 0.001) and hypertensive from 0.054 +/- 0.016 to 0.045 +/- 0.014 (p < 0.001). These changes were accompanied by a significant decrease in total body water (TBW): from 34.05 +/- 4.19 to 32.72 +/- 4.51 in the hypotensive group, from 34.06 +/- 7.18 to 32.91 +/- 7.27 in the normotensive group, and from 38.92 +/- 7.06 to 37.59 +/- 7.04 in the hypertensive group. The technique was found to be simple, noninvasive and helpful for the estimation of individual hemodynamic changes during dialysis procedure.
authors.affiliation: Department of Nephrology, Medical Faculty, Sv. Kiril i Metodij University, Skopje, Republic of Macedonia.
authors.forename: V
authors.initials: V
authors.lastname: Ristovska
authors.forename: G
authors.initials: G
authors.lastname: Masin
authors.forename: N
authors.initials: N
authors.lastname: Ivanovski
authors.forename: L
authors.initials: L
authors.lastname: Lazarov
authors.forename: Z
authors.initials: Z
authors.lastname: Hristovski
authors.forename: K
authors.initials: K
authors.lastname: Cakalaroski
authors.forename: M
authors.initials: M
authors.lastname: Polenaković
mesh_terms: D001794:Blood Pressure; D001823:Body Composition; D001826:Body Fluids / Q000502:physiology*; D002302:Cardiac Output; D017097:Electric Impedance; D005260:Female; D006439:Hemodynamics; D006801:Humans; D006973:Hypertension / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D006435:Renal Dialysis; D013318:Stroke Volume; D014655:Vascular Resistance