Ventilator apparatus
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United States of America Patent
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-
Nov 23, 1999
Grant Date -
N/A
app pub date -
Apr 10, 1997
filing date -
Jun 1, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Ventilator apparatus for ventilating the lungs of a patient comprises a source of as pressure to be applied internally or externally to a patient's lungs. The alternating pressure has a complex waveform deconstructable into a large amplitude waveform of a first frequency which may be produced by a blower (18) and a valve (10) and a lower amplitude waveform of a higher frequency which may be produced by a second blower and valve unit (4).
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