Resolution of Experimental Pneumothorax in Rabbits by Graded Oxygen Therapy

Autor: Michael Billie, Ronald C. Hill, Yvonne A. Shahan, Jeffrey F. Hill, Gregory Timberlake, Gregory J. England, Jason D. Harrah
Rok vydání: 1998
Předmět:
Zdroj: The Journal of Trauma: Injury, Infection, and Critical Care. 45:333-334
ISSN: 1079-6061
DOI: 10.1097/00005373-199808000-00020
Popis: Background: Small pneumothoraces have been treated by observation and tube thoracostomy in asymptomatic patients. Using a rabbit model, we demonstrated previously that inspired oxygen at 60% Fio 2 hastened the time to resolution of complete pneumothoraces compared with room air. The present study was designed to evaluate the use of lower levels of inspired oxygen and to establish a dose-response curve for the treatment of experimental pneumothoraces. Methods: Forty New Zealand White rabbits were divided randomly into four groups: room air (21%) and 30, 40, and 50% Fio 2 . Experimental pneumothoraces were created in the rabbits, and the animals were placed in cages with the designated level of inspired oxygen. Serial chest radiographs were performed until the pneumothoraces resolved. Results: Pneumothoraces treated with room air resolved in 61.65 ± 12.30 hours. Those treated with 30% Fio 2 resolved in 42.90 ± 5.97 hours, with 40% Fio 2 in 35.80 ± 4.26 hours, and with 50% Fio 2 in 33.80 ± 4.66 hours. Conclusion: These results show a statistically significant (p < 0.01) dose-dependent improvement in the resolution of pneumothoraces with increasing levels of inspired oxygen. Supplemental oxygen therapy may be used to facilitate the resolution of small, uncomplicated pneumothoraces.
Databáze: OpenAIRE
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