BURROW, KEVIN D,IRLBECK, DENNIS,MCGRAIL, THOMAS W,BURROW, BART H,MITCHELL, MICHAEL G,RICHARDS, DAVID L
申请号：
NZ58703105
公开号：
NZ587031A
申请日:
2005.01.07
申请国别(地区):
NZ
年份:
2012
代理人:
摘要：
A unilimb breathing circuit is disclosed. The unilimb breathing circuit comprises: a proximal end coupling member a distal end coupling member a corrugated expiratory tube and a corrugated inspiratory tube. The corrugated expiratory tube has a first end coupled to the proximal end coupling member, a second end coupled to the distal end coupling member, an inner diameter and an outer diameter. The expiratory tube is expandable between a fully compressed rest position and a fully expanded rest position, and has a plurality of intermediate rest positions where the expiratory tube is capable of maintaining its rest length without the exertion of an external force. The corrugated inspiratory tube has a first end coupled to the proximal end coupling member, a second end coupled to the distal end coupling member, an inner diameter and an outer diameter. The inspiratory tube is expandable between a fully compressed position and a fully expanded position, and has a plurality of intermediate rest positions where the inspiratory tube is capable of maintaining its rest length without the exertion of an external force. The ratio of the outer diameter of the inspiratory tube to the inner diameter of the expiratory tube is sized such that at 60 liters/minute of flow, the pressure drop across the circuit is no more than about 5cm of water while facilitating generally linear compressibility and expandability of the inspiratory and expiratory tubes.
