This post was updated on october 18 2018 for accuracy and comprehensivenessit was originally published on july 5 2017. These volumes are determined by measurement of whole body bioimpedance spectroscopy at 50 frequencies via electrodes placed on the wrist and ankle. Whole body bioimpedance measurement. Materials and methods patient populations. Whole body and segmental bis measurements four points whole body and segmental bis measurements see figure 3 were performed on. The whole body bioimpedance technique is a highly promising non invasive reproducible fast and inexpensive bed side method for monitoring hydration status.
Bioelectrical impedance analysis bia is a commonly used method for estimating body composition in particular body fat and muscle massin bia a weak electric current flows through the body and the voltage is measured in order to calculate impedance resistance of the body. When it comes to body composition testing and analysis most people instantly think of body fat percentages and muscle mass. Measurement of total body bioimpedance is the most commonly used method for estimating whole body compartments. Most body water is stored in muscle. Mono frequency 50 khz and multi frequency 3 khz 1 mhz whole body and thoracic segment bioimpedance measurement were doing before and after hemodialysis session in 20 patients. Segmental and whole body bioimpedance measurements in continuous peritoneal dialysis patients 71 622 bioimpedance measurement protocol the measures were made with the analyzer of biological impedance model sta bia akern rjl system italy figure 61.
Many of the whole body bioimpedance instruments apply three approaches for impedance measurement. Materials and methods 31. Measurement whole body electrical bioimpedance wbeb in different cardiac clinical settings during cardiac catheterization and coronary artery bypass graft cabg surgery and for monitoring patients with acute chf and over a wide range of ci values and severity of left ventricular dysfunction. Using segmental bioimpedance measurements it is possible to obtain information about the fluid change in each body segment song lee kim and kim 1999 perit. Once re and ri have been calculated from a bioimpedance measurement the amount of extracellular and intracellular fluids can be calculated see 9 for further details. The relation between hyperhydration in thorax segment through real part of impedance and mean blood.
Yet todays medical bia bioelectrical impedance analysis devices do so much more than just measure body fat and muscle mass. Tetrapolar whole body hand foot bioelectrical impedance zwb is utilized in body composition analysis for direct assessment of soft tissue hydration vector bia and indirect assessment of lean and fat soft tissue mass bia prediction equations. A new device the body composition monitor bcm. Hand to foot method 1417 foot to foot 4446 method and hand to hand method 4748. Fresenius medical care bad homburg germany provides a convenient method to obtain ecw and total body water precisely table table1. The patients were classified in hypertensive or non hypertensive according to the mean blood pressure bpmean.
Limbs and trunk contribute to zwb by 90 and 10 respectively. Measurement errors of the system are lower.
Gallery of Whole Body Bioimpedance Measurement
