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Various skin impedance models based on physiological stratification.

Dhruba Jyoti Bora1, Rajdeep Dasgupta2

  • 1Department of Electronics and Instrumentation Engineering, NIT Silchar, Assam, Silchar, India. dhrubajyoti139@gmail.com.

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Summary

This study analyzes electrical models of human skin for transdermal drug delivery. The Tregear Model at Level 3 offers a simple yet effective electrical equivalent for skin impedance, with fractional models providing good approximations.

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Area of Science:

  • Biophysics
  • Electrical Engineering
  • Pharmacology

Background:

  • Transdermal drug delivery offers non-invasive administration.
  • The skin's complex structure impedes drug passage.
  • Electrical equivalent circuits can model skin impedance.

Purpose of the Study:

  • Analyze three electrical models of human skin (Montague, Tregear, Lykken).
  • Evaluate model sensitivity to parameter changes.
  • Compare model performance with Constant Phase Element (CPE) models.

Main Methods:

  • Analysis of transfer functions for Montague, Tregear, and Lykken models.
  • Sensitivity analysis of model parameters (resistance and capacitance).
  • Application of normal derivative and Hausdorff Distance for curve analysis.

Main Results:

  • Tregear Model at Level 3 demonstrates simplicity for human skin electrical equivalence.
  • Fractional ordered CPE models offer accurate approximations.
  • Montague Model serves as a benchmark for comparison.

Conclusions:

  • The Tregear Model (Level 3) is suitable for modeling skin impedance in transdermal applications.
  • Fractional CPE models provide a valuable alternative for skin impedance modeling.
  • Future models should integrate biological properties with physiological stratification.