Abstract:Objective To investigate the relationship between the types of bronchoscopic interventions and fever.Methods 1 390 patients with bronchoscopy from January 2019 to June 2019, excluding outpatient patients and department of thoracic surgery (n = 119) and only probe or sputum aspiration (n = 30), 1 241 cases eventually included. The subjects were divided into two groups according to the surgical items and frequency of bronchoscopy: 428 cases in single operation group and 813 cases in multiple operation group. According to the bronchoalveolar lavage condition, 173 cases were divided into non-lavage group, 878 cases in one segment lavage group and 190 cases in multiple segments lavage group. The differences between varied clinical characteristics were compared.Results The total fever rate was 5.88%. There was no statistical difference between the single interventional operation group and the multiple interventional operation group (P > 0.05). The fever rate of pulmonary infectious diseases was 10.13%, which was higher than that of non-infectious diseases (3.97%) (P < 0.05). The fever rate of single-segment BAL group was not significantly different from that of multi-segments BAL group in pulmonary infectious diseases, but in pulmonary non-infectious diseases. The rate of fever in multi-segments BAL (9.62%) was significantly higher than that of single-segment BAL (3.21%) (P < 0.05). Among 56 patients with fever, 30 had positive etiology. The most common pathogen was Mycobacterium tuberculosis, followed by aspergillus and viral infections. Non-infectious patients with fever were mostly immunocompromised patients.Conclusion The frequency of bronchoscopic interventional operation do not increased the risk of fever, while pulmonary infectious diseases (tuberculosis, aspergillus and virus) can increase the risk of fever, non-infectious diseases in the multi-segments BAL operation can easily cause fever.