Abstract
Background: Pericardial effusion is a relatively common complication after cardiac surgery, in which a large proportion of cardiac tamponade causes hemodynamic disturbances, and can have serious consequences.
 Objective: "Evaluation of the efficacy and safety of pericardial drainage with ultrasound-guided fine-needle aspiration". 
 Method: Cross-sectional, retrospective. Accept all patients with pericardial effusion after cardiac surgery were recruited at the Emergency Department and the Intensive Care Unit who performed pericardial aspiration from May 2021 to October 2022.
 Results: There were 46 patients included in the study; the average age is 52.04 ± 12.46 years, the youngest is 26 years, the oldest is 81 years old; The group of patients with heart valve disease had the highest rate of pericardial effusion, accounting for 93.4%; patients with atrial septal defect have recurrent pericardial effusion after surgery; there is a higher rate of recurrence and need for surgical conversion with the use of a sheet + pigtail device compared with a catheter; 36 (78.3%) patients did not have recurrent effusion and 10 (21.7%) patients had relapse; 100% of patients are alive after pericardial drainage.
 Conclusion: The results of treatment of pericardial effusion with fine needle aspiration pericardial drainage under the guidance of ultrasound after cardiac surgery are positive, the use of the catheter is initially shown to be safer than the use of sheat + pigtail.
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