DAANCE Patient Monitoring Exam Questions
and Verified Answers with Rationale Latest
Edition 2026/2027
Question 1
Which of the following is the primary physiological parameter
measured by a pulse oximeter?
A. Blood pressure
B. Arterial oxygen saturation
C. End tidal carbon dioxide
D. Heart rate rhythm
Correct Answer: B
Rationale: A pulse oximeter is designed to noninvasively
measure the percentage of arterial hemoglobin binding sites
occupied by oxygen, commonly referred to as oxygen saturation
or SpO2. While it also displays the pulse rate, its primary
clinical purpose is oxygenation monitoring.
Question 2
What is the normal range for resting end tidal carbon dioxide in
a healthy adult patient breathing ambient air?
A. 10 to 20 mmHg
B. 20 to 30 mmHg
, C. 35 to 45 mmHg
D. 50 to 60 mmHg
Correct Answer: C
Rationale: End tidal carbon dioxide levels typically range
between 35 and 45 mmHg in a normal, healthy adult.
Monitoring this parameter provides critical feedback regarding
the adequacy of ventilation and cellular metabolism during
sedation and anesthesia.
Question 3
During moderate sedation, which cardiovascular parameter
requires the most frequent routine documentation according to
standard oral and maxillofacial surgery guidelines?
A. Central venous pressure
B. Blood pressure and heart rate
C. Pulmonary artery wedge pressure
D. Cardiac output index
Correct Answer: B
Rationale: Blood pressure and heart rate are vital signs that
must be monitored and recorded at regular intervals throughout
the administration of sedation and general anesthesia. These
metrics allow the surgical team to quickly identify
hemodynamic instability, hypotension, or tachycardia.
Question 4
,Which lead is most commonly monitored continuously on the
electrocardiogram during outpatient oral surgery to detect
myocardial ischemia and arrhythmias?
A. Lead III
B. Lead aVR
C. Lead II
D. Lead V6
Correct Answer: C
Rationale: Lead II is widely considered the standard single lead
for continuous electrocardiographic monitoring because it aligns
well with the electrical axis of the heart, providing optimal
visualization of P waves, QRS complexes, and overall rhythm
disturbances or ischemic changes.
Question 5
What does a sudden, drastic drop in end tidal carbon dioxide
levels most commonly indicate during an anesthetic procedure?
A. Hypoventilation
B. Malignant hyperthermia
C. Esophageal intubation or circulatory collapse
D. Equipment overheating
Correct Answer: C
, Rationale: A sudden loss or severe drop in end tidal carbon
dioxide to near zero strongly indicates that the endotracheal tube
is placed in the esophagus rather than the trachea, or that a
catastrophic disruption in cardiac output has occurred, stopping
pulmonary blood flow.
Question 6
Which component of the electrocardiogram waveform
represents ventricular depolarization?
A. P wave
B. QRS complex
C. T wave
D. U wave
Correct Answer: B
Rationale: The QRS complex corresponds to the electrical
depolarization of the right and left ventricles, which precedes
ventricular contraction. The P wave represents atrial
depolarization, and the T wave represents ventricular
repolarization.
Question 7
What is the primary clinical significance of monitoring the
patient's respiratory rate during office-based oral and
maxillofacial surgery?
A. Assessing body temperature fluctuations
and Verified Answers with Rationale Latest
Edition 2026/2027
Question 1
Which of the following is the primary physiological parameter
measured by a pulse oximeter?
A. Blood pressure
B. Arterial oxygen saturation
C. End tidal carbon dioxide
D. Heart rate rhythm
Correct Answer: B
Rationale: A pulse oximeter is designed to noninvasively
measure the percentage of arterial hemoglobin binding sites
occupied by oxygen, commonly referred to as oxygen saturation
or SpO2. While it also displays the pulse rate, its primary
clinical purpose is oxygenation monitoring.
Question 2
What is the normal range for resting end tidal carbon dioxide in
a healthy adult patient breathing ambient air?
A. 10 to 20 mmHg
B. 20 to 30 mmHg
, C. 35 to 45 mmHg
D. 50 to 60 mmHg
Correct Answer: C
Rationale: End tidal carbon dioxide levels typically range
between 35 and 45 mmHg in a normal, healthy adult.
Monitoring this parameter provides critical feedback regarding
the adequacy of ventilation and cellular metabolism during
sedation and anesthesia.
Question 3
During moderate sedation, which cardiovascular parameter
requires the most frequent routine documentation according to
standard oral and maxillofacial surgery guidelines?
A. Central venous pressure
B. Blood pressure and heart rate
C. Pulmonary artery wedge pressure
D. Cardiac output index
Correct Answer: B
Rationale: Blood pressure and heart rate are vital signs that
must be monitored and recorded at regular intervals throughout
the administration of sedation and general anesthesia. These
metrics allow the surgical team to quickly identify
hemodynamic instability, hypotension, or tachycardia.
Question 4
,Which lead is most commonly monitored continuously on the
electrocardiogram during outpatient oral surgery to detect
myocardial ischemia and arrhythmias?
A. Lead III
B. Lead aVR
C. Lead II
D. Lead V6
Correct Answer: C
Rationale: Lead II is widely considered the standard single lead
for continuous electrocardiographic monitoring because it aligns
well with the electrical axis of the heart, providing optimal
visualization of P waves, QRS complexes, and overall rhythm
disturbances or ischemic changes.
Question 5
What does a sudden, drastic drop in end tidal carbon dioxide
levels most commonly indicate during an anesthetic procedure?
A. Hypoventilation
B. Malignant hyperthermia
C. Esophageal intubation or circulatory collapse
D. Equipment overheating
Correct Answer: C
, Rationale: A sudden loss or severe drop in end tidal carbon
dioxide to near zero strongly indicates that the endotracheal tube
is placed in the esophagus rather than the trachea, or that a
catastrophic disruption in cardiac output has occurred, stopping
pulmonary blood flow.
Question 6
Which component of the electrocardiogram waveform
represents ventricular depolarization?
A. P wave
B. QRS complex
C. T wave
D. U wave
Correct Answer: B
Rationale: The QRS complex corresponds to the electrical
depolarization of the right and left ventricles, which precedes
ventricular contraction. The P wave represents atrial
depolarization, and the T wave represents ventricular
repolarization.
Question 7
What is the primary clinical significance of monitoring the
patient's respiratory rate during office-based oral and
maxillofacial surgery?
A. Assessing body temperature fluctuations
