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What is the major motor nerve for the intrinsic junctions
muscles of the larynx? - ANSWER -
Recurrent Laryngeal Nerve
During an acute apneic event which receptors
are responsible for responding to increases in
Which sensory nerve is stimulated to produce PaCO2 (H+ ions)? - ANSWER -Central
laryngospasm & which muscles are responsible chemoreceptors
for laryngospasm? - ANSWER -Internal
branch of Superior Laryngeal Nerve & Lateral
cricoartyenoids Where are the peripheral chemoreceptors
located & what nerve(s) mediate information? -
ANSWER -Carotid/aortic bodies &
A 42F undergoes subtotal thyroidectomy under Glossopharyngeal nerve and Vagus nerve
general anesthesia. Upon extubation, the patient
is unable to phonate when asked if they are
having any pain. The patient quickly develops Peripheral chemoreceptors are most sensitive to
strider. What is the most likely complication? - what changes? - ANSWER -Decreased
ANSWER -Bilateral RLN damage PaO2
Gas exchange within the tracheobronchial tree Which of the following is associated with an
begins at what generations? - ANSWER - increase in P50? A) Decreased H+ ions. B) Fetal
17-19 Hemoglobin. C) Decreased temperature. D).
Sickle Cell. - ANSWER -D) Sickle Cell
Which description of alveoli distribution is most
correct? A) Alveoli are largest at the base of the All of the following are associated with the
lung. B) The smallest alveoli are found at the shifting of the oxyhemoglobin dissociation curve
apex of the lung. C) The largest alveoli are found to the left except? A) Pulmonary circulation
throughout the lung. D) Alveoli are smallest at environment. B) Hypoventilation. C) Decreased
the base of the lung - ANSWER -D) Alveoli 2,3-DPG. D) Hypocapnia. - ANSWER -B)
are smallest at the base of the lung Hypoventilation
Which description of pneumocytes is most A patient is given 200mcg of fentanyl on
correct? A) Type I pneumocytes are round and induction. What happens tot he oxyhemoglobin
more numerous than Type II. B) Type II dissociation curve and the carbon dioxide blood
pneumocytes produce Type I pneumocytes dissociation curve? - ANSWER -The
which form tight junctions. C) Type I oxyhemoglobin dissociation curve shifts to the
pneumocytes contain the majority surfactant. D) right.
Type II pneumocytes are round and form tight The carbon dioxide dissociation curve shifts up
junctions to prevent permeability. - and to the left
ANSWER -B) Type II pneumocytes
produce Type I pneumocytes which form tight
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If an ABG reads PaO2 = 58mmHg with a patient
breathing 21% FiO2. What is the source of this
blood and what would you except SaO2 to be? In West Zone 2, perfusion is determined by which
pressure? - ANSWER -Arterial-Alveolar
A.Mixed venous blood / 70% pressure gradient
B.Arterial blood / 60%
C.Arterial blood / 90%
D.Mixed venous blood / 90% - ANSWER - When a patient is anesthetized and paralyzed,
C. Arterial blood/ 90% then placed in the lateral decubitus position a
V/Q mismatch occurs. What is happening with
the dependent lung that is causing this
What is the PaO2 when SaO2 is 50% - mismatch? - ANSWER -The dependent
ANSWER -26-27mmHg lung receives increased perfusion but is poorly
ventilated
Intrapulmonary pressure becomes more positive
during which phase of breathing? - A patient breathing room air has a PaO2 =
ANSWER -Expiration 50mmHg and PAO2= 100mmHg. Why is this
patient hypoxic? - ANSWER -There is a
V/Q mismatch
What is the O2 content of whole blood if Hgb=
10g/dL, PaO2=60mmHg, and SaO2 =90% -
ANSWER -12.5 mL/dL What is the purpose of preoxygenating prior to
induction of anesthesia? - ANSWER -To fill
the FRC
In what form is CO2 carried primarily in blood? -
ANSWER -HCO3 (bicarbonate)
Vital capacity is composed of:
A) expiratory reserve volume and inspiratory
What ion is bicarbonate exchanged for at the red capacity
blood cell to maintain electroneutrality? - B) Tidal volume, inspiratory reserve volume and
ANSWER -Chloride ions expiratory reserve volume
C) Total lung capacity minus residual volume
D) All of the above - ANSWER -D) All of the
What is included in anatomic dead space? - above
ANSWER -Volume of gas in conducting
airways
Which parameters can NOT be directly obtained
from spirometry? - ANSWER -FRC and
What is the complication if a patient has a portion Total lung capacity
of the lung that's V/Q ratio is 0. -
ANSWER -The patient has an absolute
shunt. (Right to left shunt) Perfusion without Which parameter does not change with age? -
Ventilation ANSWER -FRC
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FRC= CC in which scenarios? - ANSWER - What mallampatti class is this: Faucial pillars, soft
In supine position by mid 40's and in upright palate visible - ANSWER -Mallampatti class
position by mid 60's of age II
What are the most correct controlled ventilation What are the best indicators for difficult intubation
volume control settings for a healthy 70kg female - ANSWER -Mallampatti class and
for an ORIF of the right radius? thyromental distance
A) TV 600mL RR 8
B) TV 500mL RR 8
C) TV 850mL RR 10 You are given induction medications and are
D) TV 1000mL RR 5 - ANSWER -B) TV attempting mask ventilation. You are unable to
500mL RR 8 obtain ETCO2 or visualize chest rise. What is the
appropriate next step?
A) Increase FiO2
What is the alveolar oxygen tension given the B) Utilize O2 flush valve to fill reservoir bag
following information? C) Place OAW
At sea level D) Give a rapid active muscle relaxant to facilitate
Room air intubating conditions - ANSWER -C) Place
PaCO2=27mmHg - ANSWER -116mmHg OAW
What is the metabolic oxygen rate for a A 75F ASA 4 presents for a CABG. Hx of COPD,
normothermic anesthetized patient? - HTN, CAD/MI, IDDM, PVD. After induction of
ANSWER -250mL/min general anesthesia your initial attempt at
intubation is unsuccessful. You change your
blade to a miller and reposition the airway; your
The following results from spirometry pulmonary next attempt at intubation is unsuccessful.
function test revealed: According to the ASA Difficult Airway algorithm,
FEV1= 4.2L what should your next step be?
FVC= 5.1L
FEV1/FVC=0.82 A.Call for help
What is your diagnosis - ANSWER -Normal B.Place an LMA
PFTs C.Return to mask ventilation
D.Attempt a 3rd intubation - ANSWER -A.
Call for help
You are discussing the next case with the
surgical team. They categorize the upper airway
obstruction as an extra thoracic foreign body. You are helping in the ER due to a natural gas
What can you expect upon evaluation of the explosion in the area. You are helping with triage.
patient's respiratory status? - ANSWER - Your patient is an 18F with no pertinent medical
Impaired inspiration history. She has minor surface burns on her