Flow regulated, time cycled high frequency percussive ventilator

A control-monitor, in combination with a percussive ventilation breathing head adapted to be supplied with a flow of pulsatile gas from a gas supply tube from the control-monitor, the breathing head having an elongated breathing head body with an interior passageway therein, a reciprocating injector shuttle movable in the interior passageway caused to distally move due to the supplied pulsatile gas against a proximal bias in the interior passageway and eject gas through a shuttle internal flow passage and through the breathing head's interior passageway, the breathing head having a sensory port in its interior passageway which sensory port is fluidly coupled to a sensory tube leading to the control-monitor, the control-monitor comprising:

• a control-monitor casing adapted to be fluidly connected to the gas supply tube and adapted to supply controlled pulsatile gas to the breathing head, the control-monitor casing also adapted to be fluidly connected to the sensory tube and adapted to sense pressure in the breathing head;
• a pulsatile gas generator module in the casing adapted to control the supply of pulsatile gas to the breathing head;
• a pulse amplitude module, a pulse frequency module and a mean airway pressure (MAP) module sensing pulsatile gas amplitudes, frequency and MAP in the breathing head wherein respective outputs from the amplitude, frequency and MAP modules are applied to corresponding amplitude, frequency and MAP displays on the casing;
• a pulsatile gas amplitude control knob and a pulsatile frequency control knob to control the pulsatile gas generator module and effect the pulsatile gas flow supplied to the breathing head;
• first and second amplitude (AMP) control indicia adjacent the amplitude control knob;
• the first AMP indicia defined by a bent conical AMP indicia with a wide conical AMP span, indicating application of a greater gas amplitude with a complementary rotation of the amplitude control knob, the bent conical AMP indicia further having a narrow conical AMP span, indicating application of a lesser gas amplitude with a complementary counter-rotation of the amplitude control knob;
• the second AMP indicia further including a single waveform and an adjacent vertical line with up and down arrows, the up and down arrows indicating, either (a) for counterclockwise ascending AMP knob control, the second AMP indicia on the right of the amplitude control knob and the up arrow indicating application of the greater gas amplitude with the complementary rotation of the amplitude control knob and the down arrow indicating application of the lesser gas amplitude with the complementary counter-rotation of the amplitude control knob or (b) for clockwise ascending AMP knob control, the second AMP indicia on the left of the amplitude control knob, and the up arrow indicating application of the greater gas amplitude with the complementary rotation of the amplitude control knob and the down arrow indicating application of the lesser gas amplitude with the complementary counter-rotation of the amplitude control knob;
• first and second frequency (F) control indicia adjacent to the frequency knob;
• the first F indicia defined by a bent conical F indicia with a wide conical F span, indicating application of a greater frequency of pulsatile gas with a complementary rotation of the frequency control knob, the bent conical F indicia also having narrow conical F span, indicating application of a lesser frequency of pulsatile gas with a complementary counter-rotation of the frequency control knob;
• and
• the second F indicia further including multiple waveforms and an adjacent horizontal line above the multiple waveforms with left and right arrows, the left and right arrows indicating, either (a) for counterclockwise ascending F knob control, the second F indicia on the right of the frequency control knob and the left arrow indicating application of the greater frequency of pulsatile gas with the complementary rotation of the frequency control knob and the right arrow indicating application of the lesser frequency of pulsatile gas with the complementary counter-rotation of the frequency control knob or (b) for clockwise ascending F knob control, the second F indicia on the left of the frequency control knob, and the right arrow indicating application of the greater frequency of pulsatile gas with the complementary rotation of the frequency control knob and the left arrow indicating application of the lesser frequency of pulsatile gas with the complementary counter-rotation of the frequency control knob.