[Emergency ventilation using an Ambu-bag with a new coniotomy set]

A new coniotomy set (Mini-Trach, Portex Ltd) for endotracheal suction was modified with a 4-mm tube adapter and used for ventilation with standard resuscitation bags (Ambu, Laerdal) in two corpses. Minute volumes achieved with open glottis were 36 +/- 1.9 l/min for Ambu, 33 +/- 2.8 l/min for Laerdal, and 16 +/- 1.1 l/min for a standard anaesthesia machine, respiratory frequencies were 51 +/- 5.3/min, 46 +/- 8.9/min, and 30 +/- 3.3/min respectively. Auscultation and inspection showed good ventilation of both lungs. We conclude that this coniotomy set is suitable for emergency ventilation by standard resuscitation bags until a definite airway can be established; it permits higher flow than needle coniotomy and avoids most of its complications. Care must be taken when outflow must also be achieved by the same cannula.