Perthes syndrome. or traumatic asphyxia. is a clinical syndrome associating cervicofacial cyanosis with cutaneous petechial haemorrhages and subconjonctival bleeding resulting from severe sudden compressive chest trauma. Deep inspiration and a Valsalva maneuver just prior to rapid and severe chest compression. https://www.ealisboa.com/flash-choice-Sten-Jacket-M-flash-find/