Abstract: A medical dressing for treating open chest injuries, or other injuries that compromise or could possibly compromise the pleural space of the chest cavity. Specifically, a medical dressing used by first responders to treat an open pneumothorax, treat and/or prevent a tension pneumothorax from developing, remove the accumulated blood of a hemothorax or re-inflating a collapsed lung without invasive procedures and in some instances act as a conduit for treating a tension pneumothorax or a collapsed lung with invasive procedures.