Page 1 of 38
MICU CCRN EXAM REVIEW (LATEST UPDATE 2025 /
2026) QUESTIONS WITH ANSWERS | GRADE A | 100%
CORRECT
ARDS findings .....ANSWER.....INFLAMMATORY
Acute
CXR - Bilateral infiltrates
PaO2/FiO2 <300mmHg
Predisposing condition
Nothing else explains
ARDS - WHAT TO SEE TO DIAGNOSE .....ANSWER.....Lavage
CBC: 80% neutrophils
Proteinacious fluid
ARDS - What to Ignore .....ANSWER.....PCWP
,Page 2 of 38
VENTING ARDS: .....ANSWER.....lung infiltration happens because
the posterior portions of the lungs are gravidy dependent
(Deadspace: volume of ventilated air not participating in gas
exchange)
Anatomical: Nose, trachea, bronchi
Physiological: Alveoli not paricipating in gas exchange So
pushing air just vents the anterior portions
Overdisdentioin causes Ventilator Related Injury NOT
Barotrauma
VENTILATION GOALS .....ANSWER.....TIDAL VOLUME: 6ml/Kg
PBW
PlPressure: 30cm H20
SpO2: 88% -95%
pH: 7.35 - 7.45
ARDS CAUSE OF DEATH .....ANSWER.....Multiorgan failure
,Page 3 of 38
Number of organs that fail from systemic inflammation predict
mortality (adults)
IN pediatric patients, progosis is mesured by FiO2 and PaO2
WHAT IS HYPOXEMIA .....ANSWER.....Hemoglobin saturation
<60%
NON INVASIVE FiO2 PERCENTAGES .....ANSWER.....NASAL
CANNULA: **Number 1-6**; 20% -40% o2
VENTILATED FACE MASK: Number 6-10; 40% - 60% o2
NON-REBREATHER: Number 10-15; 60% - 80% o2
NONINVASIVE VENTILATION
(Tight Fitting Mask - reduces intubation rates and complications,
mortality in Hypoxemic Respriatory Failure) .....ANSWER.....HF
Nasal Cannula
CPAP - PeeP only, oxygenation (CHF, OSA)
, Page 4 of 38
BiPAP - Expiratory PosAirPRessure and Inspiratory PosAirPressure
(COPD)
NonInvasive Vent WHO IS IT NOT GOOD FOR
.....ANSWER.....Unresponsive
Facial Trauma
Circulatory mess
Impending cardiac or respiratory arrest
Lots of secretions
NonInvVent - Good for .....ANSWER.....OSA
CHF
COPD exacerbations
ASTHMA (early)
Hyperinflates at the end of expiration, makes for dynamic
hyperinflation
MICU CCRN EXAM REVIEW (LATEST UPDATE 2025 /
2026) QUESTIONS WITH ANSWERS | GRADE A | 100%
CORRECT
ARDS findings .....ANSWER.....INFLAMMATORY
Acute
CXR - Bilateral infiltrates
PaO2/FiO2 <300mmHg
Predisposing condition
Nothing else explains
ARDS - WHAT TO SEE TO DIAGNOSE .....ANSWER.....Lavage
CBC: 80% neutrophils
Proteinacious fluid
ARDS - What to Ignore .....ANSWER.....PCWP
,Page 2 of 38
VENTING ARDS: .....ANSWER.....lung infiltration happens because
the posterior portions of the lungs are gravidy dependent
(Deadspace: volume of ventilated air not participating in gas
exchange)
Anatomical: Nose, trachea, bronchi
Physiological: Alveoli not paricipating in gas exchange So
pushing air just vents the anterior portions
Overdisdentioin causes Ventilator Related Injury NOT
Barotrauma
VENTILATION GOALS .....ANSWER.....TIDAL VOLUME: 6ml/Kg
PBW
PlPressure: 30cm H20
SpO2: 88% -95%
pH: 7.35 - 7.45
ARDS CAUSE OF DEATH .....ANSWER.....Multiorgan failure
,Page 3 of 38
Number of organs that fail from systemic inflammation predict
mortality (adults)
IN pediatric patients, progosis is mesured by FiO2 and PaO2
WHAT IS HYPOXEMIA .....ANSWER.....Hemoglobin saturation
<60%
NON INVASIVE FiO2 PERCENTAGES .....ANSWER.....NASAL
CANNULA: **Number 1-6**; 20% -40% o2
VENTILATED FACE MASK: Number 6-10; 40% - 60% o2
NON-REBREATHER: Number 10-15; 60% - 80% o2
NONINVASIVE VENTILATION
(Tight Fitting Mask - reduces intubation rates and complications,
mortality in Hypoxemic Respriatory Failure) .....ANSWER.....HF
Nasal Cannula
CPAP - PeeP only, oxygenation (CHF, OSA)
, Page 4 of 38
BiPAP - Expiratory PosAirPRessure and Inspiratory PosAirPressure
(COPD)
NonInvasive Vent WHO IS IT NOT GOOD FOR
.....ANSWER.....Unresponsive
Facial Trauma
Circulatory mess
Impending cardiac or respiratory arrest
Lots of secretions
NonInvVent - Good for .....ANSWER.....OSA
CHF
COPD exacerbations
ASTHMA (early)
Hyperinflates at the end of expiration, makes for dynamic
hyperinflation
