A fractional order impedance model for heterogeneous drug distribution in obese patients during general anesthesia

Amani R. Ynineb, Erhan Yumuk, Hamed Farbakhsh, Ghada Ben Othman, Dana Copot, Isabela R. Birs, Cristina I. Muresan, Robin De Keyser, Samir Ladaci, Clara M. Ionescu, Martine Neckebroek

Research output: Contribution to journalConference articlepeer-review

Abstract

Personalised pharmacokinetic models imply stepping away from the classical assumption of homogeneous drug mixing in various tissue compartments in the body, with a particular impact on obese patients. In this work, the pharmacokinetic compartmental model structure is revisited to account for non-uniform distribution of uptake/clearance time constants in patients as a nonlinear function of body mass index. Simulations are confirming expected patterns of drug distribution in the body and can account for post-anesthesia side effects up to 72 hours. We apply spectroscopy to extract the complex impedance in fat tissue samples. The data is modelled by a Cole-Cole model, where parameters of the fractional order impedance model are optimized using a genetic algorithm. The findings suggest that fat tissue will exhibit anomalous diffusion when drug uptake and clearance are present.

Original languageEnglish
Pages (from-to)61-66
Number of pages6
JournalIFAC-PapersOnLine
Volume58
Issue number12
DOIs
Publication statusPublished - 1 Jul 2024
Event12th IFAC Conference on Fractional Differentiation and its Applications, ICFDA 2024 - Bordeaux, France
Duration: 9 Jul 202412 Jul 2024

Bibliographical note

Publisher Copyright:
© 2024 The Authors. This is an open access article under the CC BY-NC-ND license.

Keywords

  • bioimpedance
  • Cole-Cole model
  • compartmental modelling
  • fractional order impedance model
  • frequency domain
  • general anesthesia
  • spectroscopy

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