Applications of BIA

Historically, the applications of Bioelectrical Impedance Analysis (BIA) have been focused on human body composition. Although peer reviewed literature describes a wide variety of various disease or population specific applications, the migration of BIA technology from research to clinical applications has been slow. One possible cause may be the fact that the potential usefulness of BIA is so widespread and involves so many different medical specialties. Consequently, development of validated applications and the necessary FDA clearances will take time. It is interesting to note that“From 2000 to 2006, the number of papers cited in Medline and containing the keywords ‘bio-impedance’ or ‘impedance tomography’ increased by 56%.”[1] It is obvious that interest in BIA continues to grow.

The purpose of this section of our website is to provide descriptions of current applications of BIA. These descriptions are drawn from a number of sources, but we maintain emphasis on peer-reviewed literature.

Case Studies Several of our customers have been kind enough to write about how BIA affects their work…

  • Lee Trotter, D.O. — Bariatrics Managing Postoperative Complications and Nutritional Deficiencies in order to Improve Outcomes of Bariatric Surgery. Dr. Trotter has also prepared a presentation discussing the usefulness of BIA in bariatric practice.
  • Dorothy VanderJagt PhD. — Research Estimation of the nutritional status of displaced children in a rural area of Nigeria using bioelectrical impedance analysis.

The documents above were not created RJL Systems. Their content is the sole responsibility of the authors.

Peer-Reviewed Papers We also have a collection of published, peer-reviewed journal articles that discuss different uses of BIA in humans, plants, and animals.

Abstracts of Papers written about BIA

These papers and abstracts of papers have been published in peer-reviewed journals. They may draw conclusions and discuss applications of Bioelectrical Impedance Analysis which have not been reviewed by the FDA. Statements made within them are the sole responsibility of the authors. Unless otherwise indicated, no material support was provided to the authors or study investigators by RJL Systems.


Real Time Bioelectrical Impedance Analysis (BIA) The essays in this section discuss the science of BIA and impedance plethysmography and their application in collecting and interpreting real-time data.

Real time bioelectrical impedance analysis (BIA) – Understanding what BIA measures

Discussions of resistance and reactance measurements in biological and
non-biological systemsBy the staff of RJL Systems, September 2, 2008

Introduction Real-time monitoring of impedance changes with an RJL Systems Quantum Desktop
Experiment 1.0 Boiling and cooling a standard solution of Potassium Chloride – Watching changes in Resistance
Experiment 2.0 Fish and understanding cell aging – Watching changes in Reactance
Experiment 3.0 Aging fresh and frozen chicken breast – Watching changes in Reactance
Experiment 4.0 Cooking and freezing a potato – Watching changes in both Resistance and Reactance
Experiment 5.0 The ripening of a banana – Watching changes in both Resistance and Reactance

General Documentation on BIA and/or Body Composition Documentation which does not fall into one of the above categories can be found here. You would expect to find body composition average data here.


[1] Richard H Bayford et al 2008 Physiol. Meas29