Prehospital Trauma Life Support (PHTLS) Practice Test

Performing pericardiocentesis is the correct intervention for suspected cardiac tamponade because this procedure directly addresses the buildup of fluid in the pericardial sac that is compressing the heart. Cardiac tamponade occurs when excess fluid collects in the space between the heart and the pericardium, which can impair the heart's ability to pump effectively.

By performing pericardiocentesis, a needle is inserted to drain the fluid, which alleviates the pressure on the heart and can restore normal hemodynamics. This intervention can be lifesaving, as it allows the heart to fill and contract more efficiently, improving blood flow.

In contrast, cardiopulmonary resuscitation is focused on maintaining circulation and oxygenation during cardiac arrest, rather than addressing fluid accumulation. Antibiotic administration is relevant in infections but does not treat the mechanical issue of cardiac tamponade. Defibrillation is used for certain types of arrhythmias but does not impact fluid dynamics surrounding the heart. Therefore, pericardiocentesis stands out as the most appropriate and targeted intervention for managing suspected cardiac tamponade.