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Fresenius Medical Care The BCM – Body Composition Monitor allows the detection of overhydration by determining the quantitative amount of excess fluid in. Fresenius Medical Care SUPPORT. For further information on the BCM – Body Composition Monitor, please see the following downloads: General Information. Download scientific diagram | The Fresenius’ Body Composition Monitor (BCM) is an example of multi-frequency Bio-impedance analysis technology. Picture.

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Estimation of RI has much greater uncertainty and for segmental measurements, especially, in the trunk, the data were largely uninformative.

Body composition monitor (BCM)

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Probing the dry weight by bioimpedance: Dynamics of segmental extracellular volumes during freseniuz in body position by bioimpedance analysis. This provided equivalent data to the standard Freseniis device, which was validated by processing standard BCM impedance data with the custom analysis programme and comparing the results with those from the standard BCM see appendix 1. This gave the possibility of making BCM measurements across a number of paths and also allowed the isolation of individual segments for measurement see figure 1.

At a population level, it is becoming well accepted that using BCM as an aide in guiding fluid management in haemodialysis improves outcomes Onofriescu et al. Rapid plasma volume decline upon quiet standing reflects large filtration capacity in dependent limbs. Author information Copyright and License information Disclaimer. Despite the good agreement between change in BCM-measured OH and change in weight, the model for OH did suggest there was a degree of ultrafiltration induced changes in fluid distribution, with a larger change in the lower limbs than the upper.

This supports the validation literature of the BCM which has shown that the change in BCM-measured OH over dialysis is comparable to the ultrafiltration volume Wabel et al. Validated alternative pathways would allow measurements to be made on patients who would have otherwise have been managed without BCM or managed based on poor quality data. Use of post-dialysis measurements Considering the use of post-dialysis BCM measurements, change in body weight was compared to change in BCM-measured OH as there is no accepted gold standard measure of OH to validate post-dialysis measurements.


Data collection Healthy controls had height measured using a stadiometer and weight measured using calibrated scales. Journal of applied physiology Bethesda, Md. However, there is a lack of a sufficiently robust evidence-base for use of the BCM outside of standard protocols. Does the presence of an arteriovenous fistula alter changes in body water following hemodialysis as determined by multifrequency bioelectrical impedance assessment? Journal of Applied Physiology.

Body Composition Monitor

There are reasonably large limits of agreement which should be taken into account when making post-dialysis measurements, but these measurements were taken immediately after dialysis and it is reasonable to assume that they would be reduced if there was a time delay introduced between dialysis end and BCM measurement, as recommended by the manufacturer.

This uncertainty will be reduced with time after dialysis, such as asking patients to move off the freseniuw station to be weighed, before a measurement is made.

Making BCM measurements post-dialysis introduces a negligible bias to OH measurements but does increase measurement uncertainty, which fresneius be accounted for when interpreting such data.

Haemodialysis patients showed different pre-dialysis patterns than subjects with normal renal function.

The only statistically significant interaction was for the foot-to-foot path, which suggests that there is a greater change in BCM-measured OH across this path compared to the other paths.

Use of alternate paths The data from healthy controls show that there is no difference cbm BCM-measured OH between all the whole-body paths other than the foot-to-foot measurement, which had a difference of 0. Table 2 Model for Freaenius in healthy controls. Vresenius Altman analysis was done using Analyse-it for Microsoft Excel version 2.

The paths included in the model were limited to the 6 whole-body paths: Significance levels were set at 0. Adjustments for age and sex in each model are given and also for measurement time in the models assessing LTM and ATM.


Body fluid volume determination via body composition spectroscopy in health and disease. Heavily bandaged limbs, damaged skin and amputations can prevent the use of the standard measurement path, while some complications may not prevent a measurement but will significantly affect the quality of the measurement — e.

If relative changes in R E over dialysis are used to indicate changes in fluid status, it can be seen that the greatest relative change is in the leg segments table 5. One of the implications of preferential removal of fluid from the legs than arms could be that the legs are the last segment that fluid is recruited from.

The data from healthy controls suggest that there is no difference in BCM-measured OH between all the whole-body paths other than the foot-to-foot measurement. American journal of kidney diseases: Use fersenius post-dialysis measurements There was good agreement between change in BCM-measured OH on the reference measurement path [pre-dialysis OH] — [post-dialysis OH] with change in weight fig.

Assessment of fat-free mass using bioelectrical impedance measurements of the human body. The 8-lead fresemius does not display Cole-plots or body composition data to allow real-time assessment of artefacts or consistency, so repeat measurements were not made. A whole-body model to distinguish excess fluid from the hydration of major body tissues.

Body composition monitor (BCM)

Comorbidities present included acute coronary syndrome, heart failure, cerebrovascular disease, liver disease, peripheral vascular disease and smoking. Bioelectrical impedance analysis–part I: Supplementary Material Appendices Click here to view.

BCM-measured OH is greater when measuring across a site of vascular access, but the increase arguably is not clinically significant when the uncertainty in other methods of target weight assessment is considered.

The use of measurement time as an interaction term in the models for dialysis patients showed frseenius measured-OH changed by a different amount between the paths.