SUB ASSESSMENT FINAL EXAM PREP
2026 DETAILED PRACTICE QUESTIONS
CORRECT ANSWERS and RATIONALES
A+ STUDY GUIDE | INSTANT DOWNLOAD
Sub Assessment Final Exam
Q1. A 64-year-old patient with a history of chronic
obstructive pulmonary disease (COPD) is admitted to
the emergency department experiencing acute
respiratory distress. The patient appears cyanotic,
utilizes accessory muscles to breathe, and exhibits a
respiratory rate of 28 breaths per minute. Arterial
blood gas (ABG) analysis reveals a pH of 7.28, PaCO2
of 62 mmHg, and PaO2 of 54 mmHg. The physician
orders controlled oxygen therapy. Which of the
following nursing interventions is the absolute highest
priority when initiating oxygen therapy for this
specific patient?
A. Administer oxygen at a high flow rate of 10-15 L/min via a
non-rebreather mask to rapidly reverse severe hypoxemia.
B. Initiate oxygen at a low flow rate of 1-2 L/min via
nasal cannula or 24%-28% via a Venturi mask to
prevent suppression of the hypoxic drive.
C. Place the patient in a supine position to maximize thoracic
expansion and promote optimal ventilation-perfusion
matching.
D. Encourage deep breathing exercises and coughing
techniques every two hours without altering the baseline
oxygen delivery settings.
Rationale: In patients with severe chronic COPD, the
respiratory center becomes insensitive to hypercapnia (high
CO2 levels). Consequently, hypoxemia (low oxygen levels)
,serves as their primary stimulus to breathe, known as the
hypoxic drive. Administering high concentrations of oxygen
can eliminate this stimulus, leading to progressive respiratory
hypoventilation, severe respiratory acidosis, carbon dioxide
narcosis, and potentially respiratory arrest. A Venturi mask is
highly preferred because it delivers a precise, controlled
concentration of oxygen.
Q2. A clinical nurse specialist is evaluating a research
study evaluating the efficacy of a new monoclonal
antibody for treating severe rheumatoid arthritis. The
study utilizes a randomized, double-blind, placebo-
controlled design with a sample size of 1,200
participants followed over a 24-month period. The
primary endpoint is a 50% reduction in disease activity
scores (ACR50). The results demonstrate a statistically
significant improvement in the treatment group
compared to the placebo group (p < 0.01), with a
relative risk reduction of 35%. When critically
appraising the internal validity of this study, which
factor represents the most critical strength?
A. The inclusion of an exceptionally long 24-month follow-up
period which guarantees zero participant attrition.
B. The utilization of double-blinding for both the
participants and the investigators evaluating the
clinical endpoints to minimize bias.
C. The large sample size of 1,200 participants which inherently
eliminates all potential confounding variables across groups.
D. The focus on a 50% reduction in disease activity scores as a
primary endpoint rather than measuring subjective patient-
reported outcomes.
Rationale: Double-blinding is a cornerstone of internal
validity in clinical trials. It prevents both performance bias
(differences in care provided, or participant expectations) and
detection bias (systematic differences in how outcomes are
,assessed). While a large sample size improves statistical
power, it does not inherently eliminate all confounders unless
randomization is successful, and it does not prevent blinding
failures. Long follow-up periods actually increase the risk of
attrition rather than guaranteeing its absence.
Q3. A 42-year-old multigravida client at 34 weeks of
gestation presents to the triage unit complaining of
sudden, severe, continuous abdominal pain
accompanied by dark vaginal bleeding. Upon
assessment, the nurse notes that the patient's
abdomen is rigid, board-like, and exquisitely tender to
light palpation. The fetal heart rate monitor shows a
baseline of 110 beats per minute with repetitive late
decelerations and minimal variability. Maternal vital
signs indicate tachycardia (118 bpm) and hypotension
(92/56 mmHg). Which underlying pathophysiology is
most consistent with this presentation?
A. Total placenta previa resulting from abnormal blastocyst
implantation in the lower uterine segment near the internal os.
B. Premature separation of a normally implanted
placenta from the uterine wall prior to delivery,
leading to retroplacental hemorrhage.
C. Spontaneous rupture of the uterine myometrium along the
site of a previous classical cesarean scar during early labor.
D. Marginal insertion of the umbilical cord into the fetal
membranes causing exposed vessels to lacerate during cervical
dilation.
Rationale: The classic triad of abruptio placentae (placental
abruption) includes severe abdominal pain, uterine rigidity
(board-like abdomen), and dark vaginal bleeding, often
accompanied by fetal distress and maternal hemodynamic
instability. This condition involves premature separation of
the placenta from the decidua basalis. In contrast, placenta
, previa presents with painless, bright red vaginal bleeding, and
the uterus remains soft and non-tender.
Q4. A 58-year-old male patient with a long history of
chronic alcohol abuse and liver cirrhosis is admitted
with severe ascites and peripheral edema. The
physician prescribes spironolactone 100 mg orally
daily and furosemide 40 mg orally daily. During the
morning assessment, the nurse notes that the patient
is increasingly lethargic, has a flapping tremor of the
hands when extended (asterixis), and is disoriented to
time and place. Laboratory results reveal an elevated
serum ammonia level of 110 mcg/dL. Which
medication should the nurse anticipate administering
immediately?
A. Neomycin sulfate to eliminate all aerobic bacteria
throughout the gastrointestinal tract permanently.
B. Lactulose via oral or nasogastric administration
titrated to achieve 2 to 3 soft stools per day.
C. Sodium polystyrene sulfonate to rapidly lower potassium
levels and protect myocardial conduction.
D. Spironolactone at a doubled dose to increase the rate of
ascites fluid clearance through renal excretion.
Rationale: The patient is exhibiting classic signs of hepatic
encephalopathy, including confusion, disorientation, asterixis,
and elevated serum ammonia levels. Lactulose is the primary
treatment; it works by trapping ammonia in the gut as
ammonium ions, which cannot be reabsorbed into the
bloodstream, and expelling it through its laxative effect. The
therapeutic goal is 2 to 3 soft stools per day. Neomycin can be
used as an adjunct but is not the primary first-line choice due
to nephrotoxicity and ototoxicity.
Q5. An 8-year-old child is brought to the pediatric
clinic with a two-week history of periorbital edema,
dark tea-colored urine, and generalized malaise. The
2026 DETAILED PRACTICE QUESTIONS
CORRECT ANSWERS and RATIONALES
A+ STUDY GUIDE | INSTANT DOWNLOAD
Sub Assessment Final Exam
Q1. A 64-year-old patient with a history of chronic
obstructive pulmonary disease (COPD) is admitted to
the emergency department experiencing acute
respiratory distress. The patient appears cyanotic,
utilizes accessory muscles to breathe, and exhibits a
respiratory rate of 28 breaths per minute. Arterial
blood gas (ABG) analysis reveals a pH of 7.28, PaCO2
of 62 mmHg, and PaO2 of 54 mmHg. The physician
orders controlled oxygen therapy. Which of the
following nursing interventions is the absolute highest
priority when initiating oxygen therapy for this
specific patient?
A. Administer oxygen at a high flow rate of 10-15 L/min via a
non-rebreather mask to rapidly reverse severe hypoxemia.
B. Initiate oxygen at a low flow rate of 1-2 L/min via
nasal cannula or 24%-28% via a Venturi mask to
prevent suppression of the hypoxic drive.
C. Place the patient in a supine position to maximize thoracic
expansion and promote optimal ventilation-perfusion
matching.
D. Encourage deep breathing exercises and coughing
techniques every two hours without altering the baseline
oxygen delivery settings.
Rationale: In patients with severe chronic COPD, the
respiratory center becomes insensitive to hypercapnia (high
CO2 levels). Consequently, hypoxemia (low oxygen levels)
,serves as their primary stimulus to breathe, known as the
hypoxic drive. Administering high concentrations of oxygen
can eliminate this stimulus, leading to progressive respiratory
hypoventilation, severe respiratory acidosis, carbon dioxide
narcosis, and potentially respiratory arrest. A Venturi mask is
highly preferred because it delivers a precise, controlled
concentration of oxygen.
Q2. A clinical nurse specialist is evaluating a research
study evaluating the efficacy of a new monoclonal
antibody for treating severe rheumatoid arthritis. The
study utilizes a randomized, double-blind, placebo-
controlled design with a sample size of 1,200
participants followed over a 24-month period. The
primary endpoint is a 50% reduction in disease activity
scores (ACR50). The results demonstrate a statistically
significant improvement in the treatment group
compared to the placebo group (p < 0.01), with a
relative risk reduction of 35%. When critically
appraising the internal validity of this study, which
factor represents the most critical strength?
A. The inclusion of an exceptionally long 24-month follow-up
period which guarantees zero participant attrition.
B. The utilization of double-blinding for both the
participants and the investigators evaluating the
clinical endpoints to minimize bias.
C. The large sample size of 1,200 participants which inherently
eliminates all potential confounding variables across groups.
D. The focus on a 50% reduction in disease activity scores as a
primary endpoint rather than measuring subjective patient-
reported outcomes.
Rationale: Double-blinding is a cornerstone of internal
validity in clinical trials. It prevents both performance bias
(differences in care provided, or participant expectations) and
detection bias (systematic differences in how outcomes are
,assessed). While a large sample size improves statistical
power, it does not inherently eliminate all confounders unless
randomization is successful, and it does not prevent blinding
failures. Long follow-up periods actually increase the risk of
attrition rather than guaranteeing its absence.
Q3. A 42-year-old multigravida client at 34 weeks of
gestation presents to the triage unit complaining of
sudden, severe, continuous abdominal pain
accompanied by dark vaginal bleeding. Upon
assessment, the nurse notes that the patient's
abdomen is rigid, board-like, and exquisitely tender to
light palpation. The fetal heart rate monitor shows a
baseline of 110 beats per minute with repetitive late
decelerations and minimal variability. Maternal vital
signs indicate tachycardia (118 bpm) and hypotension
(92/56 mmHg). Which underlying pathophysiology is
most consistent with this presentation?
A. Total placenta previa resulting from abnormal blastocyst
implantation in the lower uterine segment near the internal os.
B. Premature separation of a normally implanted
placenta from the uterine wall prior to delivery,
leading to retroplacental hemorrhage.
C. Spontaneous rupture of the uterine myometrium along the
site of a previous classical cesarean scar during early labor.
D. Marginal insertion of the umbilical cord into the fetal
membranes causing exposed vessels to lacerate during cervical
dilation.
Rationale: The classic triad of abruptio placentae (placental
abruption) includes severe abdominal pain, uterine rigidity
(board-like abdomen), and dark vaginal bleeding, often
accompanied by fetal distress and maternal hemodynamic
instability. This condition involves premature separation of
the placenta from the decidua basalis. In contrast, placenta
, previa presents with painless, bright red vaginal bleeding, and
the uterus remains soft and non-tender.
Q4. A 58-year-old male patient with a long history of
chronic alcohol abuse and liver cirrhosis is admitted
with severe ascites and peripheral edema. The
physician prescribes spironolactone 100 mg orally
daily and furosemide 40 mg orally daily. During the
morning assessment, the nurse notes that the patient
is increasingly lethargic, has a flapping tremor of the
hands when extended (asterixis), and is disoriented to
time and place. Laboratory results reveal an elevated
serum ammonia level of 110 mcg/dL. Which
medication should the nurse anticipate administering
immediately?
A. Neomycin sulfate to eliminate all aerobic bacteria
throughout the gastrointestinal tract permanently.
B. Lactulose via oral or nasogastric administration
titrated to achieve 2 to 3 soft stools per day.
C. Sodium polystyrene sulfonate to rapidly lower potassium
levels and protect myocardial conduction.
D. Spironolactone at a doubled dose to increase the rate of
ascites fluid clearance through renal excretion.
Rationale: The patient is exhibiting classic signs of hepatic
encephalopathy, including confusion, disorientation, asterixis,
and elevated serum ammonia levels. Lactulose is the primary
treatment; it works by trapping ammonia in the gut as
ammonium ions, which cannot be reabsorbed into the
bloodstream, and expelling it through its laxative effect. The
therapeutic goal is 2 to 3 soft stools per day. Neomycin can be
used as an adjunct but is not the primary first-line choice due
to nephrotoxicity and ototoxicity.
Q5. An 8-year-old child is brought to the pediatric
clinic with a two-week history of periorbital edema,
dark tea-colored urine, and generalized malaise. The
