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CCRN Respiratory test with 100- correct answers 2024
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CCRN Respiratory test with 100- correct answers 2024
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CCRN: Respiratory testwith 100% correct
answers 2024
Ventilation - answer Movement of air in (from
atmosphere) and out (From body)
Ventilation: Central control (brain stem) - answer
Primary control, senses blood pH (decrease leads
to acidosis, which results in an increase in
rate/depth= ventilation stimulated!).
Ventilation: Peripheral control (aortic arch) -
answer Secondary control, senses PaO2 in blood, a
decrease = hypoxemia, stimulates ventilation!
**Chronic PaCo2 retainer rely on mild hypoxemia
for ventilator drive.
Clinical indicator of ventilator? - answer PaCO2!
Minute ventilation - answer Tidal volume (Vt aka
the amount of air that moves in or out of the lungs
with each respiratory cycle.) x Respiratory rate.
, Normal is about 4L/minute. An increase in minute
ventilation = an increased work of breathing!
Dead space ventilation - answer Volume of air that
DOES NOT reach the alveoli per minute, remains in
conducting zone. Normal antomic dead space is
2mL/kg of vt.
Alveolar dead space - answer Pathologic! non-
perfused alveoli. **a clot in pulmonary circulation
means no blood flow past alveoli in that area of
pulmonary circulation
Pulmonary perfusion - answer Movement of blood
through pulmonary capillaries. 4L/min (normal
ventilation is represented by V). 5L/min (normal
perfusion is represented by Q). **Ideal lung unit is
0.8 (4/5) is normal V/Q ratio!
"Good lung down" technique - answer Blood will go
to the lung that is downward (aka a right sided
lying patient, blood will go to the right lung). Pt's
with unilateral pathology should be placed on
"good side" to help perfusion. (Large right sided
PNA, should be placed on LEFT side).
Pulmonary shunt - answer Perfusion without
ventilation. Blood moved from the right side of the
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