A systematic evaluation of bioelectrical impedance measurement after hemodialysis session

A systematic evaluation of bioelectrical impedance measurement after hemodialysis session. There is still no definitive indication about the ideal point of time to perform bioimpedance analysis (BIA) in hemodialysis patients. Furthermore, the interpretation of data in this regard is difficult becaus...

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Bibliographic Details
Published in:Kidney international 2004-06, Vol.65 (6), p.2435-2440
Main Authors: Di Iorio, Biagio R., Scalfi, Luca, Terracciano, Vincenzo, Bellizzi, Vincenzo
Format: Article
Language:English
Subjects:
Adult
Aged
Anuria - pathology
Anuria - physiopathology
Anuria - therapy
BIA
bioelectrical impedance analysis
Biological and medical sciences
Body Composition
body water
Body Water - physiology
Body Weight
Electric Impedance
Female
hemodialysis
Humans
Male
Medical sciences
Middle Aged
Nephrology. Urinary tract diseases
Nutritional Status
phase angle
reactance
Renal Dialysis
Reproducibility of Results
resistance
Time Factors
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Summary:A systematic evaluation of bioelectrical impedance measurement after hemodialysis session. There is still no definitive indication about the ideal point of time to perform bioimpedance analysis (BIA) in hemodialysis patients. Furthermore, the interpretation of data in this regard is difficult because there is still no comprehensive information about the fluctuations in BIA variables occurring in these subjects. The aim of this study was to assess BIA changes occurring in hemodialysis and specifically in the dry-weight state. We studied 27 anuric patients (20 males and 7 females; age 56.1 ± 13.7years) on chronic hemodialysis. Single-frequency BIA (R, resistance; Xc, reactance; and PhA, phase angle) was performed (1) before and at the end of hemodialysis (dialysis period); (2) 15, 30, 60, 90, and 120 minutes after hemodialysis (postdialysis period); and (3) 24, 48, and 68hours after hemodialysis (interdialysis period). Body weight decreased by 2.8 ± 0.8kg during hemodialysis, was unchanged during the postdialysis period, and progressively rose during the interdialysis period. At the same time, BIA variables significantly increased during hemodialysis (R, 453 ± 74 and 542 ± 98 ohm; Xc, 38 ± 10 and 53 ± 16 ohm; P < 0.05), remained stable over the 120-minute period after treatment (R, 538 ± 94, 539 ± 95, 538 ± 94, 541 ± 95, and 544 ± 95 ohm; and Xc, 53 ± 15, 53 ± 15, 51 ± 16, 52 ± 16, and 52 ± 16 ohm; NS), and subsequently declined [R, 471 ± 79 (P =
ISSN:0085-2538
1523-1755
DOI:10.1111/j.1523-1755.2004.00660.x