GREEN ICU: responsible and sustainable ICU Irene Salinas Gabiña, M. José Pita López

Pneumomediastinum radiologic signs: Naclerio's V and continuous diaphragm sign Christopher Barrera-Hoffmann, Yadira Mariaca-Ortíz, Enrique Monares-Zepeda

Improvement opportunities for communication in the ICU Á. Estella