Fig. 1From: Prehospital portable ultrasound for safe and accurate prehospital needle thoracostomy: a pilot educational study In this illustrated figure, the correct locations (as specified previously as being 2nd ICS MCL, or 4th/5th ICS AAL/MAL) are represented in black. The frequency of the presence of a dangerous underlying structure is stratified by what technique was used, with diagonal slashed circles representing landmark-based attempts, and the horizontal dashed circle representing the single ultrasound-based attempt with a dangerous underlying structureBack to article page