Timothy BATEMAN,Stephen James FIELD,Andrew Thomas JEFFREY,Christopher John WOOSNAM
申请号：
US15752756
公开号：
US20180236194A1
申请日:
2016.08.15
申请国别(地区):
US
年份:
2018
代理人:
摘要：
An inner cannula (200) for a tracheostomy tube (100) has an extruded shaft (20) with a smooth bore. A helical reinforcement element (23) is moulded onto the outside of the shaft the axial strength of which is increased by multiple groups of short bridging elements (24) extending between two adjacent turns of the reinforcement element. The bridging elements (24) are spaced around and along the shaft (20).
