Fig. 1
Photograph showing rSO2 measurement in a mock patient by ELTs and the portable near-infrared spectroscopy unit (portable rSO2 monitor). a The detector consists of two sensors that monitor the bilateral frontal lobes. The ELT can carry the portable rSO2 monitor (HAND ai TOS®; TOSTEC CO., Tokyo, Japan) and perform cardiopulmonary resuscitation without difficulty in the pre-hospital setting. b The portable rSO2 monitor is 170 × 100 × 50 mm in size and 600 g in weight. It can be carried easily by hanging it around the neck, and it can be used even in severe pre-hospital environments such as heavy rain and strong sunlight. rSO 2 regional saturation of oxygen; ELT emergency life-saving technician