Evaluation of factors affecting time to achieve dry weight among hemodialysis patients using bioimpedance spectroscopy

Amjad Khan, Amer Hayat Khan, Azreen Syazril Adnan, Syed Azhar Syed Sulaiman, Nafees Ahmad, Siew Hua Gan

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Background: Achieving and maintaining dry weight appears to be an effective strategy for controlling and maintaining normotension among hypertensive patients on hemodialysis (HD). Objective: The present study aimed to determine the time at which the majority of patients achieve postdialysis dry weight using bioimpedance spectroscopy (BIS). Methods: A total of 220 HD patients were prospectively assessed for fluid overload using the Fresenius body composition monitor (BCM). BCM readings were taken at 30 and 45 min postdialysis. Results: Among the 220 patients included in this study, 120 (54.5%) achieved a euvolemic state at 30 min, and 25 (11.4%) achieved it at 45 min according to the BCM. In the multivariate analysis, vascular access other than arteriovenous fistula (AVF) (OR = 0.286, p value = 0.049) and cardiovascular disease (OR = 0.384, p value = 0.026) had a statistically significant negative association and receiving HD at Hospital Universiti Sains Malaysia (HUSM) (OR = 2.705, p value = 0.008) had a statistically significant positive association with achieving a euvolemic state at 30 min. Conclusion: This suggests that assessing the hydration status at 45 min postdialysis in all patients or in those with identified risk factors for not achieving a euvolemic state at 30 min will provide a relatively accurate assessment for most patients.

Original languageEnglish
Pages (from-to)311-319
Number of pages9
JournalIrish Journal of Medical Science
Issue number1
Publication statusPublished - Feb 2019
Externally publishedYes


  • Body composition monitor
  • Dry weight
  • Hemodialysis
  • Hypertension

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