Peak pressure indications on the pressure dial are approximate only. Peak pressure ranges between 20 and 50 cm H2O, and PEEP ranges between 2 and 5 cm H2O respectively. Pressures may be verified by connecting a manometer between the modulator and the nebulizer. You can connect an in-line manometer between the modulator outlet and water trap inlet. Tidal volume may be determined by using the tidal volume chart included with the instructions.
Tidal volume is the inspiratory time multiplied by the flow rate.
Timeter and other flowmeters using a floating ball as an indication of flow are capable of being adjusted to flows above what is indicated. I have a patient who needs to use the Piper-IPPB at home. Most hospital equipment rental agencies rent larger compressors. If the compressor generates enough pressure and flow for the patient to be comfortable and to produce aerosol, then it is sufficient. A physician must prescribe the medication and amount for each treatment.