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High-Frequency Jet Ventilation

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Presentation on theme: "High-Frequency Jet Ventilation"— Presentation transcript:

1 High-Frequency Jet Ventilation
Graziano C. Carlon, M.D., F.C.C.P., William S. Howland, M.D., F.C.C.R, Cole Ray, R.R.T, Saul Miodownik, M.E.E., Joyce P. Griffin, R.N., M.S.N.,C.C.R.N., Jeffrey S. Groeger, M.D.  CHEST  Volume 84, Issue 5, Pages (November 1983) DOI: /chest Copyright © 1983 The American College of Chest Physicians Terms and Conditions

2 Figure 1 Changes in tidal volume (V +) when driving pressure was increased from 5 to 35 psig; 1.62-mm jet cannula was inserted into endotracheal tube with 10-mm diameter, which was mounted into 80-cm corrugated airway hose with diameter of 2.4 cm. Distal end of those was connected to pneumotachygraph (Hans Rudolph model 3700). Drop in pressure across pneumotachygraph was measured by 0-2 cm full-scale differential pressure transducer (Gaeltech model 8T-2). Output of pressure transducer was amplified to provide flow wave form, which was observed on oscilloscope to verify absence of turbulent flow. Flow wave form was electronically integrated to provide volume determinations. Measurements were obtained three times at each driving pressure; values were always within 1 percent of each other. CHEST  , DOI: ( /chest ) Copyright © 1983 The American College of Chest Physicians Terms and Conditions

3 Figure 2 Schematic representation of jet ventilator circuit, highlighting inspiratory and expiratory limbs, entrainment port, and location of PEEP valve. CHEST  , DOI: ( /chest ) Copyright © 1983 The American College of Chest Physicians Terms and Conditions

4 Figure 3 Diagram of jet injector cannula, demonstrating two parallel lines, one carrying gases and other carrying fluids for humidification. CHEST  , DOI: ( /chest ) Copyright © 1983 The American College of Chest Physicians Terms and Conditions


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