Postoperative Air Leaks with Prompt Improvement of Low Suction on Digital Drainage Devices: A Retrospective Study
Abstract Purpose: The aim was to investigate the most effective suction pressure for preventing or promptly improving postoperative air leaks.Methods: We retrospectively analyzed the postoperative data of 242 patients who were monitored with a digital drainage system after pulmonary resection between December 2017 and June 2020. We divided the patients into 3 of group by suction pressure, A (Low-pressure suction group: -5 cm H₂O), B (Intermediate-pressure group: -10 cm H₂O), C (High-pressure suction group: -20 cm H₂O). Duration of air leaks, duration of chest tube replacement, the amount of postoperative air leak, fluid volume drained before chest tube removal, and the maximum amount of air leaks during drainage were evaluated.Results: A total 217 patients were included. In the order of A, B, and C groups, duration of air leaks gradually decreased and significant trend was observed (p=0.019). Duration of chest tube replacement did not significantly differ among the three groups (p=0.126). The amount of postoperative air leak just after surgery did not significantly differ among the three groups (p=0.175), however, the amount of postoperative day 1 air leak gradually decreased with statistical significance in order of A, B, and C groups (p=0.033). The maximum amount of air leaks during drainage gradually decreased in order of A, B and C groups (p=0.036). Fluid volume drained before chest tube removal did not significantly differ among the three groups (p=0.986).Conclusion: Low-pressure suction after pulmonary resection would be useful for preventing or promptly improving postoperative air leaks.