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laryngeal tube
The laryngeal tube (known as the King LT in the U.S.)〔(CME Module 10: Recent Developments in Supraglottic Airway Devices ), ''University of Toronto, Department of Anesthesia'' Website retrieved 21 May 2013〕 is an airway management device designed as an alternative to other airway management techniques such as mask ventilation, laryngeal mask airway, and tracheal intubation. This device can be inserted blindly through the oropharynx into the hypopharynx to create an airway during anaesthesia and cardiopulmonary resuscitation so as to enable mechanical ventilation of the lungs.
== Description ==
In its basic (standard) version, the laryngeal tube is made up of a tube with a larger balloon cuff in the middle (oropharyngeal cuff) and a smaller balloon cuff at the end (oesophageal cuff). The tube is kinked at an angle of 30-45° in the middle; the kink is located in the larger cuff. There are two apertures, located between the two cuffs, through which ventilation takes place. Both cuffs are inflated through a single small lumen line and pilot balloon. The cuffs are high-volume, low-pressure cuffs with inflating volume ranging from 10 ml (size 0) to 90 ml (size 5). A large bore syringe, which is marked with the required volume for each size, is used to inflate the cuffs. A cuff inflator can also be used, in which case the cuffs should be inflated to a pressure of 60 cm H2O. Three black lines on the tube indicate the depth of insertion when aligned with the teeth.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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