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Yeungnam Univ J Med > Volume 6(2); 1989 > Article
Yeungnam University Journal of Medicine 1989;6(2):63-70.
DOI:    Published online December 31, 1989.
A Study on the Design of High-Frequency Jet Ventilator Using PLL system.
Joon Ha Lee, Jae Chun Chung
This paper describes to design and to examine the mechanical characteristics of high frequency jet ventilator. The device consists of Phase lock loop (PLL) system, solenoid valve driving control part and Air regulating system. This study is carried out by changing several factors such as endotracheal tube (E.T. tube) diameter, injector cannula diameter, 1%, and frequency (breaths/min.) having direct effects on the gas exchange as well as parameters of the entrained gas by venturi effect, so as to measure the tidal volume and minute volume. This system characteristics were as follows: 1) Frequency: 6-594 bpm 2) Inspiration time: 1-99% 3) Variance of input air pressure: 1-30 PSI


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