Objectives: To compare procedural success and safety of pericardiocentesis using continuous ultrasonographic visualization of a long (7 cm) micropuncture needle to standard access with an 18 gauge needle without continuous ultrasound guidance.
Background: Current approaches to pericardiocentesis commonly utilize a large-bore 18 gauge needle for access without allowing for continuous visualization of needle entry into the pericardial space.
Methods: We included all consecutive patients at our institution who underwent pericardiocentesis between November 1, 2011 and March 3, 2016. A total of 21 patients (group 1) underwent pericardiocentesis using a 7 cm micropuncture needle inserted under continuous ultrasonographic guidance, while 51 patients (group 2) underwent pericardiocentesis, mostly with an 18 gauge needle (92%), following preprocedural echocardiography only. The primary endpoint was successful placement of a drain into the pericardial space.
Results: The primary endpoint was similar between group 1 and group 2 (100% vs 94%, respectively; P=.26). Successful drainage of pericardial fluid was achieved in 95% of patients in group 1 and in 98% in group 2 (P=.88). The amount of pericardial fluid drained in each group was similar (640 mL vs 557 mL, respectively; P=.26). No procedure-related complications occurred in group 1, compared with 2 cases of right ventricular perforation that occurred in group 2. In-hospital mortality and length of stay were similar.
Conclusion: This study suggests that an ultrasound-mounted micropuncture needle allows for safe and effective pericardiocentesis. This technique may provide a safer alternative to the standard use of an 18 gauge needle.
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