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Article: Preventing latrogenic air embolism in the intensive care unit: air embolism is a potentially fatal consequence of incorrect connection of endrotracheal tube cuff inflator devices. Currently, air lines from these devices can be connected to indwelling cannulae without impediment. This possibility can be eliminated with a simple modification of the air line, as described here.(design)
- Article from:
- Medical Device Technology
- Article date:
- May 1, 2007
- Author:
CopyrightCOPYRIGHT 2007 Octo Media Ltd. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Endotracheal tubes
Endotracheal (ET) tubes have a cuff at the distal end that is inflated to provide a seal in the trachea. Inflation is achieved by injecting air through a one-way valve known as the pilot tube at the other end of the line. Correct inflation pressure is important because over-inflation leads to excess pressure being exerted on the tracheal wall, and under inflation leads to an inadequate seal and an air leak when trying to ventilate the patient. A safe pressure is thought to be 20-30 cm[H.sub.2]O; pressures of more than 40 cm[H.sub.2]O are associated with ischaemia, necrosis and ultimately tracheal stenosis. (l,2) Over time, gas diffuses through ...