Nellcor Puritan Bennett 740 Ventilator

The NPB 740 ventilator is designed for intra-hospital transport of adult and pediatric patients. An internal battery charges whenever the unit is connected to an AC power source. The internal battery lasts approximately 2.5 hours. No compressed AIR gas source is needed. The support stand holds two E cylinders.

Modes include volume controlled Assist/Control and SIMV. Spontaneous ventilation includes pressure support and CPAP. The only trigger mechanism is a flow trigger adjustable from 1 - 20 LPM. There is no flow during exhalation with the flow trigger. Internal gas flow through a 50 micron gap around the piston drive mechanism allows the unit to detect the beginning of the patient's inspiratory flow which moves the piston forward.
When a mode is selected, the indicators for all the necessary controls are illuminated and flash. The operator touches the key pad of each control, adjusts the value with the knob, and presses the ACCEPT pad located immediately above the knob.

 The same touch, adjust, accept pattern is used to adjust the alarms located in the lower corner next to LED linear airway pressure monitor.
   

The alarms are:
  • Low inspiratory pressure
  • High airway pressure
  • Low tidal volume
  • High tidal volume
  • High respiratory rate
  • Low minute volume

A 5-beep pattern identifies High Priority alarms while Medium Priority alarms have 3 beeps.
   

The Apnea Parameters are available in spontaneous ventilation. Next to Apnea Parameters is the Menu key which allows the operator to scroll through 10 different functions using the knob. A Short Self Test is accessible which takes about 3 minutes to do. Lists of alarms which have autoreset may also be viewed in the message window via the Menu key.