A device for the introduction of a fluid into a humans airway. The air so introduced has a carefully modulated envelope of pressure vs. time. The envelope generally includes sequences of pressurized air packets of controlled frequency and pressures. The device produces the packets using pressurized air occluded by a shutter action that &ldquochops&rdquo and interrupts the fluid stream. The vibrations induced by the device within human organs have been shown to have beneficial effects on various bodily systems, such as an increase in heart rate variability, an increase in absorbed oxygen, and a decrease in absorbed CO2.
