Karla Maria Pereira Pires, Adriana Correa Melo, Manuella Lanzetti, Natália Vasconcelos Casquilho, Walter Araújo Zin, Luís Cristóvão Porto, Samuel Santos Valença

J Bras Pneumol.2012;38(1):98-104

Lung volume reduction surgery in an experimental rat model of emphysema

Cirurgia de redução do volume pulmonar em modelo experimental de enfisema em ratos

Laerte Brasiliense Fusco, Marcelo Heleno Fonseca, Paulo Manuel Pêgo-Fernandes, Rogério Pazetti, Vera Capelozzi, Fabio Biscegli Jatene, Sergio Almeida Oliveira

J Bras Pneumol.2005;31(1):

Background: Lung volume reduction surgery may be a viable treatment alternative for emphysema patients suffering from severe respiratory insufficiency. Objectives: To evaluate functional and morphological aspects of emphysematous rat lungs, prior to and following lung volume reduction surgery. Method: Wistar rats were divided into two experimental groups (papain without surgery and papain with surgery) and three control groups (saline without surgery, saline with surgery and papain without mechanical ventilation). After approximately 40 days of endotracheal instillation of papain or saline solution, animals in the papain with surgery and saline with surgery groups were submitted to bilobectomy of the middle lobes by right thoracotomy along the posterior border of the superior vena cava. After 1 week, the same animals were submitted to a mechanical ventilation study, which involved measurement of lung elasticity and airway resistance. For all of the animals studied, lung tissue was analyzed in order to determine alveolar diameter and the elastic fiber quantity. Results: Morphometric analysis revealed higher mean alveolar diameter in the lungs of all animals exposed to papain as compared to those exposed to saline. Elastic fiber counts in the alveolar septa of animals treated with papain were lower than those of animals receiving saline. In the animals submitted to bilobectomy and papain, lung elasticity was greater than in those receiving papain without surgery and was statistically equal to that seen in animals receiving saline (with or without surgery). Conclusion: In the respiratory systems of animals with pulmonary emphysema submitted to lung volume reduction by bilobectomy, the capacity for elastic recoil returned to values equivalent to those of the control group animals.

Keywords: Key words: Pulmonary emphysema. Papain/drugs efects. Case-control studies. Disease models, animal. Respiratory mechanics/drugs efects. Lung/sugery. Lung/anatomy & histology.

Editorial

Understanding the link between interstitial lung disease and obstructive sleep apnea: is lung volume involved?

Pedro Rodrigues Genta1, Paulo Mateus Madureira Soares Mariano1

J Bras Pneumol.2024;50(5):e20240356

Forced expiratory volume in one second and bronchodilator response in chronic obstructive pulmonary disease - a needless ritual?

Volume expiratório forçado no primeiro segundo e resposta a broncodilatador em doença pulmonar obstrutiva crônica - um ritual inútil?

Carlos Alberto de Castro Pereira

J Bras Pneumol.2005;31(5):4-6

Original Article

Radiological profile of the ideal candidate for lung volume reduction surgery to treat emphysema: a systematic review

Perfil radiológico do candidato ideal à cirurgia redutora de volume pulmonar no enfisema: uma revisão sistemática

Paula Antonia Ugalde Figueroa, Martha Silvia Martinez-Silveira, Eduardo Ponte, Aquiles Camelier, Jorge L. Pereira-silva

J Bras Pneumol.2005;31(3):197-204

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