| 摘要 |
A tracheal tube has an inflatable sealing cuff 21 with an attachment collar 11, 12 at each end. One collar 12 is moulded with reinforcing ribs 15. During manufacture of the cuff the ribs extend inwardly, but prior to assembly of the tracheal tube the cuff 21 is inverted. During assembly of the tracheal tube, the cuff is slid onto the shaft of the tube past inflating aperture 33. The other collar 11 and inflatable region 21 are then folded over the reinforced collar 12 (see arrows) and bonded in place, with the ribs 15 extending along and facing into the inflatable region. The reinforcing ribs 15 reinforce the wall of the shaft where it is exposed to pressure within the cuff 21, so that the tube shaft can be made thinner whilst still preventing it from being deformed inwardly by pressure from the cuff. |
