A45 year-old presents with acute pericarditis. the surgeon makes a small incision between two ribs and enters the thoracic cavity. an endoscope is introduced and the pericardial sac is examined by direct visualization. using an instrument introduced through the endoscope, the surgeon creates an opening in the pericardial sac for drainage purposes. what cpt® code is reported

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

on the planet jupiter, the acceleration due to gravity is approximately 26 m s2 , roughly 2.7 times the acceleration due