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Related Experiment Videos

Skin appendageal macropores as a possible pathway for electrical current

Y A Chizmadzhev1, P I Kuzmin, J C Weaver

  • 1Frumkin Institute of Electrochemistry, Russian Academy of Sciences, Moscow.

The Journal of Investigative Dermatology. Symposium Proceedings
|September 12, 1998
PubMed
Summary

Skin impedance, influenced by lipid-corneocyte and appendageal pathways, decreases with iontophoresis. This study models changes in conductive macropore density during treatment, showing strong correlation with direct measurements.

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Area of Science:

  • Biophysics
  • Dermatology
  • Electrical Engineering

Background:

  • Skin impedance is determined by parallel lipid-corneocyte (Zm) and appendageal (Za) pathways.
  • Appendageal macropores exhibit frequency-dependent electrical properties (Ra, Ca).
  • Macropore density (n(i)) increases with current density and iontophoresis duration.

Purpose of the Study:

  • To investigate the frequency-dependent electrical properties of skin impedance.
  • To model the increase in conductive macropore density during iontophoresis.
  • To correlate theoretical model predictions with direct measurements of macropore density.

Main Methods:

  • Electrical impedance measurements of skin.
  • Development of a theoretical model for skin impedance incorporating macropore parameters.

Related Experiment Videos

  • Iontophoretic treatment to alter skin properties.
  • Direct measurement of macropore density (n(i)).

    • Main Results:

    • Skin impedance decreases under iontophoresis.
    • The theoretical model accurately estimates the increase in macropore density during iontophoresis.
    • A strong correlation was found between the model's estimated n(i) and directly measured n(i).

    Conclusions:

    • The proposed model provides a unique and validated method for estimating changes in skin macropore density.
    • Appendageal impedance and macropore characteristics are crucial for understanding skin's electrical behavior during iontophoresis.
    • This model supports the understanding of iontophoresis-induced alterations in skin conductivity.