Manifestations of toxic pulmonary edema during respiratory support in an experiment
- Authors: Yaroshenko D.M.1, Khovpachev A.A.1, Ilatovskaya J.D.2, Gracheva G.Y.2,3, Tolkach P.G.1, Basharin V.A.1
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Affiliations:
- Military Medical Academy
- Veterinary Clinic of Oncology, Traumatology and Intensive Care of Dr. Sotnikov
- Saint Petersburg State University of Veterinary Medicine
- Issue: Vol 43, No 3 (2024)
- Pages: 321-330
- Section: Original articles
- URL: https://journals.rcsi.science/RMMArep/article/view/275800
- DOI: https://doi.org/10.17816/rmmar634061
- ID: 275800
Cite item
Abstract
BACKGROUND: Currently, respiratory support is successfully used to treat pulmonary edema of non-toxic origin. The manifestations of pulmonary edema of non-toxic origin and toxic pulmonary edema have similar features, so respiratory support can be effective in treating the latter.
AIM: To describe the manifestations of toxic pulmonary edema in rabbits and demonstrate the effectiveness of artificial pulmonary ventilation with support of positive end-expiratory pressure (PEEP) in case of severe intoxication with thermal destruction products of fluoroplastic-4.
MATERIALS AND METHODS: Three rabbits were used in the study: rabbit N 1 (control), rabbit N 2 (intoxication) and rabbit N 3 (treatment). Rabbits N 2 and 3 were subjected to severe intoxication with thermal destruction products of fluoroplastic-4 (1,5 HLC50, 15 min). For treatment, rabbit N 3 (treatment), an hour after exposure, underwent mechanical ventilation with PEEP (pressure-controlled mode; oxygen fraction — 0,3; starting PEEP — 5 cm H2O, tidal volume — 20–25 ml). At various times, chest radiography was performed, oxygenation index, hemoglobin saturation (SaO2), and partial pressure of carbon dioxide in exhaled air (PetCO2) were determined. Posthumously, pathological changes in lung tissue, pulmonary coefficient were determined, and histological examination was performed.
RESULTS: Exposure of rabbit N 2 (intoxication) to the thermal destruction products of fluoroplastic-4 led to the sequential formation of the interstitial and alveolar phases of toxic pulmonary edema, which contributed to its death 13 hours after exposure. As SaO2 decreased and PetCO2 increased (3 and 5 hours after exposure), in rabbit N 3 (treatment), during respiratory support, PEEP was increased twice by 2 cm H2O (maintaining a given respiratory volume), which led to the normalization of the studied parameters. On the 7th day after exposure, the condition of rabbit N 3 (treatment) did not differ from the condition of rabbit N 1 (control); no pathological changes in the respiratory system were detected.
CONCLUSION: Carrying out mechanical ventilation with PEEP, started an hour after exposure (with a stepwise increase in PEEP as the condition worsens), is effective for correcting toxic pulmonary edema in rabbits caused by severe intoxication with the thermal destruction products of fluoroplastic-4.
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##article.viewOnOriginalSite##About the authors
Dmitry M. Yaroshenko
Military Medical Academy
Author for correspondence.
Email: yaroshenko-spb@yandex.ru
ORCID iD: 0000-0003-2305-6093
SPIN-code: 1875-4797
Russian Federation, Saint Petersburg
Alexey A. Khovpachev
Military Medical Academy
Email: khovpachev@gmail.com
ORCID iD: 0009-0002-5780-1557
SPIN-code: 6189-3624
MD, Cand. Sci. (Medicine)
Russian Federation, Saint PetersburgJulia D. Ilatovskaya
Veterinary Clinic of Oncology, Traumatology and Intensive Care of Dr. Sotnikov
Email: yulia.icu@mail.ru
ORCID iD: 0009-0005-8527-0003
Russian Federation, Saint Petersburg
Galina Y. Gracheva
Veterinary Clinic of Oncology, Traumatology and Intensive Care of Dr. Sotnikov; Saint Petersburg State University of Veterinary Medicine
Email: grachevaicuvet@mail.ru
ORCID iD: 0009-0007-0589-1753
Russian Federation, Saint Petersburg; Saint Petersburg
Pavel G. Tolkach
Military Medical Academy
Email: pgtolkach@gmail.com
ORCID iD: 0000-0001-5013-2923
SPIN-code: 4304-1890
MD, Dr. Sci. (Medicine)
Russian Federation, Saint PetersburgVadim A. Basharin
Military Medical Academy
Email: basharin1@mail.ru
ORCID iD: 0000-0001-8548-6836
SPIN-code: 4671-8386
MD, Dr. Sci. (Medicine), Professor
Russian Federation, Saint PetersburgReferences
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