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6.2 Evaluation parameters
Summary of evaluation parameters
Evaluation
parameter
• Normal range display of R and X
Bioimpedance
co-ordinate system in relation to height
vector analysis
• 50 %, 75 %, 95 % percentiles in the
(BIVA)
form of tolerance ellipses
• Absolute in kg/m
Body mass
• For children: shown in percentile curves
index (BMI)
• For adults: graphic display of WHO
reference values
Extracellular
Absolute in l
water (ECW)
Fat-free mass
Absolute in kg
(FFM)
• Absolute in kg
Fat mass (FM)
• Relative in %
• For adults: normal range display
seca therefore developed its own predictive formulas for determining the
following parameters for the arms and legs:
• total body water (TBW)
• extracellular water (ECW)
• fat-free mass (FFM)
• skeletal muscle mass (SMM) for arms, legs, torso and whole body
In-house reference values were determined for the following parameters in
order to be able to show normal ranges:
• bioimpedance vector analysis (BIVA)
• mass indices (FMI, FFMI)
• phase angle (φ)
In order to determine the formulas and reference values, there was close col-
laboration with the Institute for Human Nutrition and Food Studies at the
University of Kiel and joint representative studies were conducted.
In contrast to all formulas published to date, the seca formulas are popula-
tion-specific. The formulas developed in Kiel apply solely to Caucasian
population groups.
Representative surveys were also conducted in the USA in collaboration with
the New York Obesity Nutrition Research Center at St. Luke's Roosevelt
Hospital. seca formulas for African-American, South/Central American and
Asian population groups were developed on the basis of this study.
The seca formulas are implemented only in seca mBCA devices and seca PC
software. As such, seca is a pioneer in the well-founded scientific and medi-
cally significant determination of body composition by means of bioimped-
ance analysis.
With seca, the parameters required for assessing body composition are
called evaluation parameters. The table provides an overview of the evalua-
tion parameters of the
On the device and in the
grouped into evaluation modules. This allows certain aspects of body compo-
sition to be assessed specifically (see "Evaluation modules" from page 50).
Display
in
c
2
.
seca 515/514
PC software, the evaluation parameters are
seca 115
Evaluation module
• "Fluid" from page 56
• "Health risk" from page 57
"Development/growth" from page 50
"Fluid" from page 56
"Function/rehabilitation" from page 54
• "Energy" from page 53
• "Function/rehabilitation" from page 54
English
Medical basis • 47
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