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Determination of Body Fluid Compartments by Electrical Impedance Measurements

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P. Jenin, J. Lenoir, C. Roullet, A. L. Thomasset, H. Ducrot · 1975

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Early research established that human bodies are complex electrical systems with measurable responses to electromagnetic fields.

Plain English Summary

Summary written for general audiences

This 1975 research by Jenin investigated using electrical impedance measurements to determine body fluid compartments in humans. The study explored how electrical currents behave differently in various body tissues and fluids. This foundational work helped establish methods for understanding how electricity interacts with the human body.

Why This Matters

This research represents crucial foundational work for understanding how electrical fields interact with human physiology. By studying electrical impedance in body fluid compartments, Jenin's work helped establish the scientific basis for how electromagnetic fields affect different tissues in our bodies. The science demonstrates that our bodies are complex electrical systems where different tissues conduct electricity differently. What this means for you is that this early research laid groundwork for understanding why EMF exposure affects some biological processes more than others. The reality is that studies like this from the 1970s show scientists recognized decades ago that human bodies interact with electrical fields in measurable ways. Put simply, this foundational research helps explain why modern EMF exposure from wireless devices can have biological effects - our bodies are sophisticated electrical systems that respond to external electromagnetic influences.

Figures from the Original Paper

Diagrams extracted from the original research document.

graphPage 2 - Figure 1. Values of the overall bioelectric impedance of the human body at 1 kHz (Thomasset method) as a function of height, H, and the volume of ECF determined by isotope 82 Br.
p. 2 of the original PDF
graphPage 3 - Figure 2. Values of the overall bioelectric impedance of the human body at 100 kHz (Thomasset method) as a function of height, H, and the volume of total body water (TBW) established by tritiated water.
p. 3 of the original PDF
graphPage 4 - Figure 3. Comparison of the relationship between LF and HF as a function of TBW/ECFV.
p. 4 of the original PDF

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 5 kHz - 1 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 5 kHz - 1 MHzPower lines50/60 HzCell phones~1 GHzWiFi2.4 GHz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study.

Study Details

To determine body fluid compartments by electrical impedance measurements and to investigate the relationship between impedance ratios and various physiological and pathological conditions.

Impedance measurements were performed using Thomasset's method with an apparatus adapted to medical ...

1) The Zir/Zur ratio in a normal healthy adult is a remarkable fixed value. It is equal to: 1.50 + 0...

The ratio of the LF and HF impedances appears to be an excellent and simple tool for investigation of liquid specimens, either of the total human body or of a particular organ. The study shows that the intracellular liquid compartment remains insufficient with respect to that of the extracellular liquid compartment. The impedance ratio measurements provide a promising experimental method for better investigations in this field.

Cite This Study
P. Jenin, J. Lenoir, C. Roullet, A. L. Thomasset, H. Ducrot (1975). Determination of Body Fluid Compartments by Electrical Impedance Measurements.
Show BibTeX
@article{determination_of_body_fluid_compartments_by_electrical_impedance_measurements_g4477,
  author = {P. Jenin and J. Lenoir and C. Roullet and A. L. Thomasset and H. Ducrot},
  title = {Determination of Body Fluid Compartments by Electrical Impedance Measurements},
  year = {1975},
  
  
}
No DOI on file for this study.

Quick Questions About This Study

Different body tissues and fluids conduct electricity at different rates. By measuring electrical impedance (resistance to electrical current), researchers can distinguish between various body compartments like blood, muscle, and fat tissues based on their unique electrical properties.
This foundational work established that human bodies interact measurably with electrical fields. It provided scientific methods for understanding how electromagnetic fields affect different tissues, laying groundwork for modern research on EMF biological effects and exposure assessment techniques.
Blood, muscle, fat, bone, and organ tissues all have distinct electrical properties. This research showed that electrical currents behave differently in each tissue type, helping scientists understand why electromagnetic field exposure might affect various biological systems in unique ways.
Early bioelectrical research like this demonstrated that human bodies are sophisticated electrical systems. This foundational understanding helps explain why modern wireless devices and power line fields can produce measurable biological effects in living tissues and cellular processes.
These studies showed that human bodies maintain complex electrical balances between different fluid compartments. This research revealed that external electromagnetic fields can potentially disrupt these natural electrical equilibriums, providing scientific basis for understanding EMF biological interactions.