Mechanical Ventilators Flashcards
which classification of positive pressure generators are used for peds & neonates
time-cycled
what are the 3 classifications of positive pressure ventilators
pressure, time, & volume cycled
ventilator - used for comatose pt
controlled
ventilator - fixed rate & tidal volume
controlled
ventilator - blocks pts attempt to breathe
controlled
ventilator - preset rate & tidal volume; will respond if pt initiates breath
assist-control
ventilator - will always deliver the same tidal volume, even if pt sets own rate; risk for respiratory alkalosis
assist-control
ventilator - preset rate & tidal volume; allows breathing at pts rate & tidal volume
SIMV
ventilator - can be used as a primary vent or for weaning
SIMV
ventilator - set inspiratory pressure, ⬇️ workload of breathing
pressure support
ventilator - constant flow of air around ventilator circuit; delivers a breath when pt starts to inhale
continuous flow
pressure needed by a vent to delivera set tidal volume at a given dynamic compliance
peak inspiratory pressure (PIP)
why might PIP (peak inspiratory pressure) increase
airway resistance
secretions
pulmonary edema
lung stiffening
application of positive airway pressure throughout the entire respiratory cycle for a spontaneously breathing pt
CPAP
positive pressure exerted during expiration
positive end expiratory pressure (PEEP)
