Spont Vt 5-7ml/kg IBW, RR less than 25, Decrease in WOB
What is the synchronization window?
time interval just prior to time triggering in which the ventilator is responsive to the patient's spontaneous breath
Pressure control generates a ____ flow to increase the airway pressure to a preset pressure limit
high
How does a flow trigger work?
when a pt initiates a breath base flow returning to the vent is reduced thus triggering inspiration
Advantages of MMV
promotes spont breathing, minimal support but protects against hypoventilation and resp acidosis, permits weaning but compensates for apnea
Time/breath/cycle for A/C vent
Patient or Time triggered, machine driven, volume cycled
Indications fro PC
low lung compliance-high PIP during volume ventilation (PIP > 50, Plat>35); ARDS-ARDS net protocol
PEEP mgmt
5cwp=physiologic, increase in increments of 3-5cwp while watching BP, decrease to previous level or zero for low BP, treat low BP with vol expansion or vasopressors then increase PEEP again while observing BP
Disadvantages/complications of MmV
doesnt protect against RSB(deadspace breathing), High RR with low Vt = patient breathing above VE(MMV remains inactive but PaCO2 increases, resp acidosis)
Describe Controlled Mandatory Ventilation
Time triggered, machine breath, volume or pressure cycled
