Abstract
An uncuffed pediatric version of the HI-LO JetTM triple lumen tube with an intramural jet channel for distal gas delivery was compared to a proximal delivery system (a metal cannula aimed at the ET tube orifice from a distance of 1-2mm to avoid obstructing the lumen). HI-LO tubes of 2.5, 3.0, 3.5, 4.0 & 5.0mm ID were tested in 5 anesthetized paralyzed cats using the MK-800 jet ventilator, duty cycle of 30%, FIO2 of 1.0, rates of 150 & 300 with normal & noncompliant lungs. The IDs of the metal cannula & the HI-LO tube jet channel were matched. Driving pressure was adjusted to maintain constant mean airway pressure for each pair. Under all conditions the two systems provided equally effective oxygenation & CO2 elimination: (Proximal - P, HI-LO - D).
Both systems met the essential requirements of pediatric HFJV:sta bility & free expiratory channel. The HI-LO tube generated less entrainment.The pressure monitoring channel was useful & accurate.
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Keszler, M., Sivasubramanian, N. NEW PEDIATRIC ENDOTRACHEAL TUBES FOR HIGH FREQUENCY JET VENTILATION (HFJV). Pediatr Res 18 (Suppl 4), 394 (1984). https://doi.org/10.1203/00006450-198404001-01810
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DOI: https://doi.org/10.1203/00006450-198404001-01810