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  • Title: Echography of the inferior vena cava for estimating fluid removal from patients undergoing hemodialysis.
    Author: Kusaba T, Yamaguchi K, Oda H.
    Journal: Nihon Jinzo Gakkai Shi; 1996 Mar; 38(3):119-23. PubMed ID: 8721332.
    Abstract:
    Echography was used to perform 118 consecutive measurements of the diameters of the inferior vena cava (IVC) in 28 chronic hemodialysis patients. There was a significant correlation between the percent changes in the IVC in the expiratory phase (dIVC-E) and the percent changes in body weight (dBW) (r = 0.620, p < 0.002, n = 118). The average IVC diameter in the expiratory phase before dialysis (IVC-E) was 15.3 +/- 4.6 mm and this value decreased gradually following ultrafiltration and reached an average diameter of 11.0 +/- 4.3 mm after dialysis. Three cases developed hypotension due to fluid removal. Their IVC-E value showed a rapid reduction below 11.0 mm in the early phase of hemodialysis, then maintained a plateau. The hypotension was attributed to hypovolemia due to excessive dehydration. Our results suggest that the IVC-E diameter in postdialysis would approach 11.0 +/- 4.3 mm, which could be interpreted as being close to the dry weight.
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