Fig. 1

Low cost ultrasound simulator. a The beef gelatin and psyllium fiber block, with cut-off 10 mL syringe. b Syringe barrel being used to create 2 lm within the block. The plug created within the syringe by passage of the syringe through the block is then expelled from the syringe by depressing the plunger – one such plug is displayed next to the now empty syringe. c The white arrow indicates the simulated trachea, while the black arrow indicates the simulated esophagus. d The completed simulator, with a plug partially inserted into the simulated esophagus. When the plug is fully inserted, the simulator produces the sonographic appearance of a tracheal intubation. When the plug is removed, the simulator produces the sonographic appearance of an esophageal intubation