Reason analysis for unplanned discontinuation of patient-controlled intravenous analgesia after thoracic surgery

Objective To analyze the impact factors for unplanned discontinuation of patient-controlled intravenous analgesia (PCIA) within 24 h after thoracic surgery so as to prevent over-use of medical resources. Methods Clinical data of patients with thoracic surgery in Peking Union Medical College Hospital from April 1, 2018 to March 31, 2019 were reviewed. Patients were divided into two groups according to the duration time from the start to the end of PCIA: group A(≤24 h) and group B(＞24 h). Univariate analysis and logistic multivariate regression were used to compare the demographic characteristics, anesthesia/surgery type, PCIA regimen and adverse effect between the two groups. Results A total of 371 patients were included in this study. Univariate analysis showed that the proportion of patients stopped PCIA in 24 hours was higher in female patients than that in male patients (16.8%/39.4%). The proportion of PCIA stop in 24 hours after thoracoscopic surgery was higher than that after thoracotomy (31.4%/19.7%). I