295Estudo sobre a eficácia da aerostasia pulmonar, em modelo animal, utilizando diferentes tipos de suturas Estudo sobre a eficácia da aerostasia pulmonar, em modelo animal, utilizando diferentes tipos de suturas * Study about the ability of the pulmonary aerostasia, in animal model, using differents parenchymal pulmonary types of the sutures DARCY Resultados: A média de pressão em que se observou perda do hermetismo pulmonar foi de 29cmH 2 O no tipo 1 (n = 10); 38,5cmH 2 O no tipo 2 (n = 10); 44cmH 2 O no tipo 3 (n = 10) e 51,4cmH 2 O no tipo 4 (n = 10). A comparação entre as médias mostrou diferença estatística apenas entre as suturas tipo 1 e as suturas tipo 3 e 4, p = 0,04 e p < 0,01.
Conclusão:As suturas pulmonares com grampeadores revestidos por pericárdio bovino ou recobertos por cola biológica, quando comparadas às suturas que utilizaram fio cirúrgico isoladamente, mostraram maior eficácia em manter aerostasia pulmonar em pulmões de suínos. No entanto, não há diferença na eficácia em manter aerostasia pulmonar de suínos, quando se utilizaram suturas com grampeadores isolados ou revestidos por pericárdio bovino ou cola biológica.
Background:The search for an ideal procedure to accomplish aerostasis, after partial surgical resection of the lung parenchyma, remains a practical challenge for the thoracic surgeon.Objective: The objective of this study was to compare the ability of four types of parenchymal pulmonary sutures in preventing air leaks, using a porcine model with incremental endobronchial pressures.Method: Ex vivo experimental study in porcine lungs (n = 5) at the Laboratory of Experimental Surgery of the Universidade de Caxias do Sul. Four different parenchymal pulmonary types of suture were analyzed: type 1 (absorbable suture), type 2: (stapled suture), type 3 (stapled suture with bovine pericardium) and type 4 (stapled suture with biologic glue). The surgical sutures (n = 40) were exposed to different intrabronchial pressure levels, varying from 10 cmH 2 O to 60 cmH 2 O. The presence of air leaks along the suture line was verified through the water seal maneuver.
Results:The mean intrabronchial pressure level needed to cause suture line air leaks for each type were: type 1 (n = 10): 29 cmH 2 O; type 2 (n = 10): 38.5 cmH 2 O; type 3 (n = 10): 44 cmH 2 O; and type 4 (n = 10): 51.4 cmH 2 O. The comparison between the mean intrabronchial pressure level of type 1 and of types 2 and 3 sutures was statistically significant, respectively: p = 0.04 and p = 0.01. However, the comparison between types 2, 3 and 4 did not show statistic significance (p > 0.05).
Conclusions:The pulmonary suture covered by biologic glue demonstrated more resistance to incremental levels of intrabronchial pressure. Parenchymal pulmonary sutures using stapled suture exclusively or stapled with bovine pericardium or biologic glue demonstrated an increased ability to avoid air leaks if compared to absorbable sutures in a model of porcine lung with incremental levels of intrabronchial pressure. There were no differences between...