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  • Title: [Airway pressure and transcutaneous O2 and CO2 partial pressure as monitoring measurements for high-frequency jet ventilation?].
    Author: Kluge E, Börner U, Hempelmann G.
    Journal: Anasth Intensivther Notfallmed; 1986 Aug; 21(4):198-202. PubMed ID: 3092694.
    Abstract:
    Two different methods of measuring airway pressures (n = 7), and the usefulness of transcutaneous pO2 and pCO2 measurement (n = 9) in monitoring High Frequency Jet Ventilation (HFJV), were investigated in critically ill patients. Airway pressures obtained by tip manometer from different points within trachea and mainstem bronchi during HFJV (f = 100/min, inspiratory time 40%, FIO2 0,4, minute volume 25.6 +/- 5.2 l) were nearly identical with pressures obtained from the integrated pressure line of HI-LO-JET endotracheal tubes (R = 0.9638). There was no difference between proximal and peripheral airway pressures. When using a PEEP-valve, rather high values of PEEP may occur due to gas trapping. There was sufficient correlation between transcutaneous and arterial pO2 (R = 0.7573) and poor correlation between transcutaneous and arterial pCO2 (R = 0.4987). paO2 values were 51.1% above, paCO2 values 33.4% below transcutaneous values. Transcutaneous measurement of pO2 and pCO2 is only an additional method in monitoring HFJV which can reveal rough trends but cannot replace blood gas analysis.
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