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Tracheal tubes designed to provide short-duration pulses of gas under pressure into the airway (i.e., jet pulses) at a very fast rate (more than 600 cycles per minute) for lung ventilation. These devices typically consist of a small-diameter metal or, less frequently, plastic tube; tubes appropriate for introduction through a partially withdrawn endotracheal tube during its removal are also available. Transtracheal jet-ventilation tubes allow endoscopic surgical access to the larynx; the jet-ventilation tube may be placed either supraglottically (the tube may be attached to the endoscope) or subglottically (after intubation via the nasal or the oral route). They are used mainly in patients who have acute airway problems.
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