Modes and Indications
This mode delivers a set tidal volume with every mandatory breath.
What is AC/VC
Normal starting tidal volume range (mL/Kg IBW)
What is 6-8 mL/kg
High pressure alarm priority: vent, tube or patient?
What is Patient FIRST
pH 2.29/ PaCO2 60/ PaO2 92 - Primary problem?
What is Uncompensated Respiratory Acidosis
Flow does not return to zero - name the problem.
What is Auto-PEEP
Best mode for a post-op patient who is breathing spontaneously but need support.
What is SIMV or PSV
Minimum PEEP typically applied to prevent atelectasis.
What is 5 cm H2O
Three causes of a high-pressure alarm.
What is Secretions, Kinking, Bronchospasm
ABG shows hypoxemia with normal CO2. Which settings do you adjust FIRST?
What is FiO2 or PEEP
What is lungs are over-distended
This mode guarantees volume but adjusts pressure to protect the lungs.
What is PRVC
The FIRST setting adjusted for respiratory acidosis.
What is Minute ventilation (Increase in VT or RR)
Low-pressure alarm immediately after intubations suggests:
What is Leak or disconnect
PaCO2 unchanged despite rate increases - likely cause?
What is Auto-PEEP or inadequate exhalation
Two breaths delivered back-to-back on volume curve suggests:
What is double triggering
A major disadvantage of SIMV when used long-term.
What is Increased work of breathing/delayed weaning
Most important reason to limit tidal volumes in ARDS.
What is Prevent volutrauma
Peak pressure increases but tidal volume decreases. What is happening?
What is Obstruction or decreased compliance
ABG normalization goal for permissive hypercapnia.
What is Acceptable pH (typically greater or equal to 7.25)
Jagged expiratory flow with rising peak pressure and stable plateau indicates:
What is secretions or resistance
This mode is MOST appropriate for a patient being evaluated for extubation.
What is CPAP or PSV
A sudden increase in peak preassure with normal plateau pressure indicates:
What is Increased airway resistance
The MOST dangerous action during persistent alarms.
What is Silencing alarms without assessment
Why NOT increase FiO2 for elevated CO2?
Wjat os CO2 is a ventilation problem, not an oxygenation problem.
Best vent adjustment for auto-PEEP.
What is decrease RR or Increase expiratory time