US Patent 9226651 Laryngoscope insertion section

A laryngoscope insertion section comprising a tube guide comprising at least an inferior tube guiding member and a superior tube guiding member, wherein the thickness of the insertion section in a first region is less than the external diameter of the largest diameter endotracheal tube in an operating range of endotracheal tube sizes plus the thickness of the inferior tube guiding member plus the thickness of the superior tube guiding member. Typically, the insertion section comprises an elongate member and the tube guide is lateral of the elongate member. Typically, an endotracheal tube is retained within the tube guide in flexural tension.