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Related Experiment Video

Updated: Aug 7, 2025

Lavage-induced Surfactant Depletion in Pigs As a Model of the Acute Respiratory Distress Syndrome ARDS
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Enteral liquid ventilation oxygenates a hypoxic pig model.

Tasuku Fujii1, Yosuke Yoneyama2, Akiko Kinebuchi2

  • 1Department of Anesthesiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan.

Iscience
|March 7, 2023
PubMed
Summary

Enteral ventilation using oxygenated perfluorodecalin via the rectum improved blood oxygen levels and reduced carbon dioxide in hypoxic pigs. This novel gut-mediated oxygenation method shows promise for clinical applications.

Keywords:
GastroenterologyPorcine respiratory medicineTherapy

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Area of Science:

  • Physiology
  • Respiratory Medicine
  • Gastroenterology

Background:

  • Extrapulmonary ventilation pathways are under-explored.
  • Hypoxia presents a significant clinical challenge requiring novel oxygenation strategies.

Purpose of the Study:

  • To assess the efficacy of enteral ventilation using oxygenated perfluorodecalin (O2-PFD) in a porcine model of hypoxia.
  • To investigate gut-mediated systemic and venous oxygenation kinetics.

Main Methods:

  • Hypoxic porcine models were mechanically ventilated.
  • Oxygenated perfluorodecalin (20 mL/kg) was administered intra-anally.
  • Arterial and pulmonary arterial blood gases were monitored for 30 minutes.

Main Results:

  • Intrarectal O2-PFD significantly increased partial pressure of oxygen in arterial blood (PaO2) from 54.5 to 61.1 mmHg.
  • Partial pressure of carbon dioxide (PaCO2) decreased from 38.0 to 34.4 mmHg.
  • Venous oxygenation (SvO2) monitoring suggested oxygen transfer originated from the large intestine.

Conclusions:

  • Enteral ventilation is an effective method for improving systemic oxygenation.
  • This approach warrants further clinical investigation for treating hypoxia.