Respiratory endoscopy intervention in 12 patients with refractory persistent air leakage after pulmonary surgery: a preliminary study of case series.

Objective: To explore the value of our protocol of respiratory endoscopy intervention in the treatment of refractory persistent air leakage(PAL) after pulmonary surgery.

Method: A retrospective study was conducted in 12 patients with PAL after pulmonary surgery who were successfully treated by our protocol of respiratory endoscopy intervention in the Department of Respiratory and Critical Care Medicine of the Fourth Hospital Affiliated to Soochow University and the First Hospital Affiliated to Soochow University from December 2019 to January 2024. 4 types of treatment were included in our protocol; A: chest tube drainage combined with negative pressure suction; B: medical thoracoscopy with chest tube as a path; C: stimulating bronchial mucosa hyperplasia under bronchoscopy; D: blocking of the fistula orifice with the relevant materials under the bronchoscope; And the specific treatment received by each patient was based on the condition of the patient.

Results: The bronchopleural fistula was found in 7 patients; The fistula orifice was found in 5 patients and the diameter of fistula orifices were 4.0-12.0 mm, with an average of 7.2 ± 3.6 mm. Among the 7 patients with bronchopleural fistula, 1 patient received C + D, 1 patient received A + B + C, 1 patient received A + C + D, 4 patients received A + B + C + D; Among the 5 patients with fistula orifice, 2 patients received C + D, 2 patients received A + B + D, 1 patient received A + C + D. All the 12 patients were effectively treated, among which 9 patients who underwent chest tube drainage were successfully extubed. The median (interquartile distance) retention time of chest tubes before and after our protocol of respiratory endoscopy intervention were respectively 73.5(50.5,106.25) days and 29(22,38.75) days, p < 0.05.

Conclusions: Our protocol of respiratory endoscopy intervention can significantly shorten the retention time of the patient's chest tube and effectively treat refractory PAL after pulmonary surgery. However, it should be emphasized that individualized therapy should be provided according to the location and size of the fistula orifice.