Final answer:
Immediate pre-hospital interventions for cardiac tamponade include insertion of drainage tubes into the pericardial cavity to remove excess fluid.
Step-by-step explanation:
Cardiac tamponade is a condition where excess fluid accumulates in the pericardial space, putting pressure on the heart and preventing proper relaxation and filling of the heart chambers. Immediate pre-hospital interventions for cardiac tamponade include insertion of drainage tubes into the pericardial cavity to remove the excess fluid. This procedure is typically done by experienced healthcare professionals to relieve the pressure on the heart.