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  • Title: Does rigid bronchoscopy induce bacterial translocation? An experimental study in rats.
    Author: Ozkurt S, Herek O, Atalay H, Kaleli I, Kara CO.
    Journal: Respiration; 2005; 72(1):85-8. PubMed ID: 15753640.
    Abstract:
    BACKGROUND: Although some reports suggest that bronchoscopy induces bacterial translocation (BT), the mechanisms of BT remain unclear. OBJECTIVE: We aimed to assess whether bronchoscopy or hypoxemia during bronchoscopy is responsible for BT. METHODS: We evaluated 24 rats divided into three subgroups: the control group (group 1, n = 8); the rigid bronchoscopy group (group 2, n = 8), and the group receiving bronchoscopy + mechanical ventilation (group 3, n = 8). Oxygen saturation (SaO(2)) was measured during the bronchoscopic procedure. Blood and tissue cultures from mesenteric lymph nodes (MLNs), liver, spleen and cecal contents were obtained 24 h following bronchoscopy. RESULTS: In group 2, SaO(2) was significantly lower than in groups 1 and 3 (p < 0.01). In group 2, BT significantly increased (6/8, 75%; p < 0.01 vs. group 1, and p < 0.05 vs. group 3). The main site of translocation was MLNs (6/8, 75%) in group 2, while BT was detected in only 1 rat in group 3 (1/8, 12.5%). CONCLUSION: Hypoxemia during rigid bronchoscopy resulted in intestinal mucosal damage in a rat model. Hypoxemia may have been the trigger for BT from the intestine following bronchoscopy.
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