What is meant by single frequency and multiple frequency?
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AIM: Bioelectrical impedance analysis is a promising method in determining the body compartments in hemodialysis patients. In this study, we aimed to investigate the agreement between two widely used methods: the single-frequency and multi-frequency bioelectrical impedance analyses.
METHODS: Maintenance hemodialysis patients were enrolled in the study. Single-frequency and multi-frequency bioelectrical impedance analyses were performed consecutively before hemodialysis. A second bioelectrical impedance analysis was performed right after the hemodialysis session. A third bioelectrical impedance analysis was performed one hour after hemodialysis. We used weight change as a measure of fluid removal during hemodialysis session.
RESULTS: Bioelectrical impedance analysis estimates from both devices had significant differences. Best agreement was observed between single frequency and multifrequency device at the immediate post hemodialysis extracellular water estimates (mean difference 0,076 L). We found the best agreement between weight change and extracellular water change using single-frequency bioimpedance analysis. Moreover, one hour waiting time did not improve the agreement between weight and extracellular water changes for both devices. Different estimates seem to be caused by different raw impedance data measured by both devices and device specific equations.
CONCLUSION: There are significant differences among bioelectrical impedance measurements performed with different bioelectrical impedance analyzers. Using open source software might be an important step forward in the development of standardized measurements.
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METHODS: Maintenance hemodialysis patients were enrolled in the study. Single-frequency and multi-frequency bioelectrical impedance analyses were performed consecutively before hemodialysis. A second bioelectrical impedance analysis was performed right after the hemodialysis session. A third bioelectrical impedance analysis was performed one hour after hemodialysis. We used weight change as a measure of fluid removal during hemodialysis session.
RESULTS: Bioelectrical impedance analysis estimates from both devices had significant differences. Best agreement was observed between single frequency and multifrequency device at the immediate post hemodialysis extracellular water estimates (mean difference 0,076 L). We found the best agreement between weight change and extracellular water change using single-frequency bioimpedance analysis. Moreover, one hour waiting time did not improve the agreement between weight and extracellular water changes for both devices. Different estimates seem to be caused by different raw impedance data measured by both devices and device specific equations.
CONCLUSION: There are significant differences among bioelectrical impedance measurements performed with different bioelectrical impedance analyzers. Using open source software might be an important step forward in the development of standardized measurements.
This article is protected by copyright. All rights reserved.
if helped you so please mark me down as brainlist answer my dear friend
Yashp1:
Hi !! I am sorry but I am not able to understand the answer you have given me . I study in 9th standard and some of the terms which have been mentioned in the answer are unknown to me.
my dear wait for sometime I will give the answer I am and also in class 9
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well....he gave you the answer
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