The Medtronic Covidien Puritan Bennet 840 is a ventilation system that offers the PAV+ software that supports a more natural breathing pattern, making it easier for the patient to breathe. The Puritan Bennet 840 can provide ventilation for patients ranging from neonates to adults. The PB ventilator system comes with an LCD touchscreen display. The touchscreen can help you adjust the settings while monitoring the patient. The Puritan Bennet 840 ventilation system is the predecessor to the Puritan Bennet 980.