Conclusion Abnormal enhancement of PaO2 inconsistent with dyspnea suggests the possibility of tracheal neoplasms.Blood gas analysis may play a role in the diagnosis of tracheal neoplasms.

• 结论与呼吸困难不一致动脉血氧分压增高应考虑气管肿瘤的可能,血气分析对气管肿瘤有一定的诊断价值。