Respiratory Resistance Category

With the solenoid deenergized, the subject is asked to breathe normally in and out of the device. When expiratory flow rate is at or just past maximum the solenoid is energized. This “closes the shutter” puts in series with R„, and always causes a characteristic notch in the flow tracing (Fig 4). Referring to equation […]

Methods The main modification of the setup in the present study compared with that previously reported is the design of the additional resistor. The new resistor (Fig 1) was made of three layers of stainless steel screen, two layers of No. 400 mesh and one layer of No. 300 mesh. The screens were sandwiched between […]