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Comparison of bioimpedance methods for estimating total body water and intracellular water changes during hemodialysis.
Nephrol Dial Transplant. 2011 Oct; 26(10):3319-24.ND

Abstract

BACKGROUND

The accurate assessment of body fluid volume is important in many clinical situations. Hannan et al. proposed a single-frequency bioimpedance equation (HE) to calculate extracellular water (ECW) and total body water (TBW). There are two equations based on the bioimpedance spectroscopy (BIS) method for the evaluation of body fluid volume: Xitron equations (XE) and body composition spectroscopy equations (BCSE). The aim of the study was to compare the accuracy of these three equations in body fluid volume point estimation in maintenance hemodialysis (MHD) patients.

METHODS

The BIS method was performed in MHD patients before and after a hemodialysis (HD) session. TBW, ECW and intracellular water (ICW) were calculated by XE, BCSE and HE, respectively. Hydration status (HS) was calculated using inputs of XE, BCSE and HE. ICW before dialysis was compared to ICW after dialysis. The change of TBW and HS using different equations was compared to actual ultrafiltration volume (AUV) that was calculated as weight difference of pre- to postdialysis.

RESULTS

Fifty MHD patients (27 females) were included in the study. Significant changes in ICW were observed using the XE and HE method with ultrafiltration (XE: 15.51 ± 5.07 versus 16.17 ± 5.34 L, P < 0.01; HE: 17.40 ± 5.13 versus 16.55 ± 4.71 L, P < 0.01). However, no significant ICW change was observed using BCSE (17.47 ± 4.35 versus 17.54 ± 4.36 L, P > 0.05). ΔTBW_XE and ΔTBW_HE were significantly different from AUV (XE 1.76 ± 0.89 versus 2.46 ± 0.89 L, P < 0.01; HE 4.16 ± 1.36 versus 2.46 ± 0.89 L, P < 0.01); however, ΔTBW_BCSE was much closer to AUV (2.27 ± 0.90 versus 2.46 ± 0.89 L, P = 0.129). The change of HS using inputs of BCSE was also closer to AUV (2.41 ± 0.86 versus 2.46 ± 0.89 L, P = 1.0).

CONCLUSION

Our study indicated that BCSE provided a better point estimation of ICW and TBW.

Authors+Show Affiliations

Renal Division, Department of Medicine, Peking University First Hospital, Beijing, People's Republic of China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21398364

Citation

Dou, Yanna, et al. "Comparison of Bioimpedance Methods for Estimating Total Body Water and Intracellular Water Changes During Hemodialysis." Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association, vol. 26, no. 10, 2011, pp. 3319-24.
Dou Y, Liu L, Cheng X, et al. Comparison of bioimpedance methods for estimating total body water and intracellular water changes during hemodialysis. Nephrol Dial Transplant. 2011;26(10):3319-24.
Dou, Y., Liu, L., Cheng, X., Cao, L., & Zuo, L. (2011). Comparison of bioimpedance methods for estimating total body water and intracellular water changes during hemodialysis. Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association, 26(10), 3319-24. https://doi.org/10.1093/ndt/gfq854
Dou Y, et al. Comparison of Bioimpedance Methods for Estimating Total Body Water and Intracellular Water Changes During Hemodialysis. Nephrol Dial Transplant. 2011;26(10):3319-24. PubMed PMID: 21398364.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparison of bioimpedance methods for estimating total body water and intracellular water changes during hemodialysis. AU - Dou,Yanna, AU - Liu,Li, AU - Cheng,Xuyang, AU - Cao,Liyun, AU - Zuo,Li, Y1 - 2011/03/11/ PY - 2011/3/15/entrez PY - 2011/3/15/pubmed PY - 2012/9/14/medline SP - 3319 EP - 24 JF - Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association JO - Nephrol Dial Transplant VL - 26 IS - 10 N2 - BACKGROUND: The accurate assessment of body fluid volume is important in many clinical situations. Hannan et al. proposed a single-frequency bioimpedance equation (HE) to calculate extracellular water (ECW) and total body water (TBW). There are two equations based on the bioimpedance spectroscopy (BIS) method for the evaluation of body fluid volume: Xitron equations (XE) and body composition spectroscopy equations (BCSE). The aim of the study was to compare the accuracy of these three equations in body fluid volume point estimation in maintenance hemodialysis (MHD) patients. METHODS: The BIS method was performed in MHD patients before and after a hemodialysis (HD) session. TBW, ECW and intracellular water (ICW) were calculated by XE, BCSE and HE, respectively. Hydration status (HS) was calculated using inputs of XE, BCSE and HE. ICW before dialysis was compared to ICW after dialysis. The change of TBW and HS using different equations was compared to actual ultrafiltration volume (AUV) that was calculated as weight difference of pre- to postdialysis. RESULTS: Fifty MHD patients (27 females) were included in the study. Significant changes in ICW were observed using the XE and HE method with ultrafiltration (XE: 15.51 ± 5.07 versus 16.17 ± 5.34 L, P < 0.01; HE: 17.40 ± 5.13 versus 16.55 ± 4.71 L, P < 0.01). However, no significant ICW change was observed using BCSE (17.47 ± 4.35 versus 17.54 ± 4.36 L, P > 0.05). ΔTBW_XE and ΔTBW_HE were significantly different from AUV (XE 1.76 ± 0.89 versus 2.46 ± 0.89 L, P < 0.01; HE 4.16 ± 1.36 versus 2.46 ± 0.89 L, P < 0.01); however, ΔTBW_BCSE was much closer to AUV (2.27 ± 0.90 versus 2.46 ± 0.89 L, P = 0.129). The change of HS using inputs of BCSE was also closer to AUV (2.41 ± 0.86 versus 2.46 ± 0.89 L, P = 1.0). CONCLUSION: Our study indicated that BCSE provided a better point estimation of ICW and TBW. SN - 1460-2385 UR - https://www.unboundmedicine.com/medline/citation/21398364/Comparison_of_bioimpedance_methods_for_estimating_total_body_water_and_intracellular_water_changes_during_hemodialysis_ L2 - https://academic.oup.com/ndt/article-lookup/doi/10.1093/ndt/gfq854 DB - PRIME DP - Unbound Medicine ER -