Tracheostomy tube assemblies and inner cannulae
作者： Stephen James Field , Andrew Thomas Jeffrey , Timothy Bateman , Christopher John Woosnam , Neil Steven Veasey
DOI:
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摘要: An inner cannula (2) for a tracheostomy tube (1) has resilient catch (23) at its machine end. The two triangular teeth (27) and (28) projecting outwardly towards free One tooth is shaped positioned to engage in groove (40) on the inside of hub (16) end when fully inserted. other smaller spaced rearwardly along catch. also shallow rounded bead (44) inwardly short distance rear (40). When pulled out engages causing deflect inwardly. In this way, larger displaced slightly making it easier ramp allow be withdrawn with little additional pulling force.
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