There are 6 key “lines and signs” that should be identified and interpreted during PLUS which include; 1) the pleural line, 2) A lines, 3) the bat sign, 4) the glide sign,5) B lines, and 6) the curtain sign. In addition, knowing how to identify the pericardio-diaphragmatic window, define dry lung,identify the ski jump sign, the lung pulse, Z-lines, I-lines, and the 5 sonographically-defined pleural space and lung borders isalso essential.