An experimental rat model of ex vivo lung perfusion for the assessment of lungs after prostacyclin administration: inhaled versus parenteral routes

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art_CARDOSO_An_experimental_rat_model_of_ex_vivo_lung_2011.PDF (388.09 KB)
Citações na Scopus
5
Tipo de produção
article
Data de publicação
2011
Scopus
Web of Science
PubMed
Título da Revista
ISSN da Revista
Título do Volume
Editora
SOC BRASILEIRA PNEUMOLOGIA TISIOLOGIA
Autores
MORIYA, Henrique Takachi
ALMEIDA, Francine Maria de
FECHINI, Karina
Citação
JORNAL BRASILEIRO DE PNEUMOLOGIA, v.37, n.5, p.589-597, 2011
Projetos de Pesquisa
Unidades Organizacionais
Fascículo
Resumo
Objective: To present a model of prostaglandin I(2) (PGI(2)) administration (inhaled vs. parenteral) and to assess the functional performance of the lungs in an ex vivo lung perfusion system. Methods: Forty Wistar rats were anesthetized and placed on mechanical ventilation followed by median sterno-laparotomy and anticoagulation. The main pulmonary artery was cannulated. All animals were maintained on mechanical ventilation and were randomized into four groups (10 rats/group): inhaled saline (IS); parenteral saline (PS); inhaled PGI(2) (IPGI(2)); and parenteral PGI(2) (PPGI(2)). The dose of PGI(2) used in the IPGI(2) and PPGI(2) groups was 20 and 10 mu g/kg. respectively. The heart-lung blocks were submitted to antegrade perfusion with a low potassium and dextran solution via the pulmonary artery, followed by en bloc extraction and storage at 4 degrees C for 6 h. The heart-lung blocks were then ventilated and perfused in an ex vivo lung perfusion system for 50 min. Respiratory mechanics, hemodynamics, and gas exchange were assessed. Results: Mean pulmonary artery pressure following nebulization decreased in all groups (p < 0.001), with no significant differences among the groups. During the ex vivo perfusion, respiratory mechanics did not differ among the groups, although relative oxygenation capacity decreased significantly in the IS and PS groups (p = 0.04), whereas mean pulmonary artery pressure increased significantly in the IS group. Conclusions: The experimental model of inhaled PGI(2) administration during lung extraction is feasible and reliable. During reperfusion, hemodynamics and gas exchange trended toward better performance with the use of PGI(2) than that with the use of saline.
Palavras-chave
Prostaglandins, Lung transplantation, Reperfusion, Models, animal, Rats
URI
https://observatorio.fm.usp.br/handle/OPI/22806
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Coleções
Artigos e Materiais de Revistas Científicas - FM/MCP
Artigos e Materiais de Revistas Científicas - HC/InCor
Artigos e Materiais de Revistas Científicas - LIM/61