Results
nerve block-related, coagulation dysfunction, dislocation
ADVERSE EVENTS
From Mar 2020 to Dec 2021, a total of ninety-four patients were screened and eighty were eligible for the study. Nine patients did not meet the inclusion criteria due to advanced age, coagulation dysfunction and language barrier. Five patients refused to participate in the study. After allocation, two patients in the control group failed the intervention due to change of surgical plan. All patients in the paravertebral block group successfully received study intervention. During follow-up, two patients in the paravertebral block group were dropped due to catheter dislocation and unplanned ICU admission. No nerve block-related adverse events occurred. All patients in the control group completed the follow-up. Finally, thirty-eight patients in each group were entered into analysis (Fig. Consolidated standards of reporting trials flow diagram showing patient progress through the study phases.