Development of an ex vivo human-porcine respiratory model for preclinical studies

Anatomical models to study aerosol delivery impose huge limitations and extrapolation to humans remains controversial. This study aimed to develop and validate an ex vivo human-like respiratory tract model easy to use and relevant to compare to in vivo human data. A human plastinated head is connect...

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Bibliographic Details
Published in:Scientific reports 2017-02, Vol.7 (1), p.43121-43121, Article 43121
Main Authors: Perinel, Sophie, Pourchez, Jérémie, Leclerc, Lara, Avet, John, Durand, Marc, Prévôt, Nathalie, Cottier, Michèle, Vergnon, Jean M.
Format: Article
Language:English
Subjects:
631/443/1784
692/699/1785
Aerosols
Animal models
Animals
Humanities and Social Sciences
Inhalation
Krypton
Mechanical ventilation
Models, Animal
multidisciplinary
Physiology
Radionuclide Imaging
Respiration
Respiratory System
Respiratory tract
Science
Scintigraphy
Studies
Swine - physiology
Tidal Volume
Ventilation
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Summary:Anatomical models to study aerosol delivery impose huge limitations and extrapolation to humans remains controversial. This study aimed to develop and validate an ex vivo human-like respiratory tract model easy to use and relevant to compare to in vivo human data. A human plastinated head is connected to an ex vivo porcine pulmonary tract ventilated artificially by passive expansion. A physiological study measures “pleural” depressions, tidal volumes, and minute ventilation for the respiratory rates chosen (10, 15, and 20 per minute) with three inspiratory/expiratory ratios (1/1, 1/2, and 1/3). Scintigraphy with 81m Krypton assesses the homogeneity of the ventilation. Forty different experiments were set for validation, with 36 (90%) ventilating successfully. At a respiratory rate of 15/minute with inspiratory/expiratory ratio of 1/2, the tidal volume average was 824 mL (standard deviation, 207 mL). The scintigraphy performed on 16 ex vivo models (44.4%), showed homogenous ventilation with great similarity to human physiological studies. Ratio of the peripheral to central count rates were equally correlated with human data published in the literature. This new model, combining research feasibility and human physiology likeness, provides a realistic approach to human inhalation and therefore can be an interesting tool in aerosol regional deposition studies.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep43121