NURSING 2450
Advanced
Pathophysiology
COMPLETED EXAM
2024
,1. A patient with chronic obstructive pulmonary disease (COPD)
presents with dyspnea, wheezes, and productive cough. The nurse
suspects that the patient has developed a respiratory infection.
Which of the following laboratory tests would be most useful to
confirm the diagnosis?
A) Arterial blood gas (ABG) analysis
B) Sputum culture and sensitivity
C) Chest x-ray
D) Pulmonary function tests (PFTs)
*Answer: B) Sputum culture and sensitivity*
Rationale: Sputum culture and sensitivity can identify the causative
organism and the appropriate antibiotic therapy for a respiratory
infection. ABG analysis can assess the gas exchange and acid-base
balance, but it does not indicate the presence of infection. Chest x-
ray can show the extent of lung damage, but it cannot differentiate
between infection and other causes of inflammation. PFTs can
measure the airflow and lung volumes, but they are not specific for
infection.
2. A patient with type 1 diabetes mellitus is admitted to the hospital
with diabetic ketoacidosis (DKA). The nurse monitors the patient's
fluid and electrolyte status closely. Which of the following findings
would indicate a complication of DKA?
A) Serum sodium level of 140 mEq/L
B) Serum potassium level of 3.2 mEq/L
C) Serum bicarbonate level of 18 mEq/L
D) Serum glucose level of 250 mg/dL
*Answer: B) Serum potassium level of 3.2 mEq/L*
Rationale: Serum potassium level of 3.2 mEq/L indicates
hypokalemia, which is a common complication of DKA due to
osmotic diuresis, insulin therapy, and metabolic acidosis. Serum
sodium level of 140 mEq/L is within the normal range (135-145
mEq/L). Serum bicarbonate level of 18 mEq/L is low, but it is
expected in DKA due to metabolic acidosis. Serum glucose level of
,250 mg/dL is high, but it is lower than the typical range for DKA
(300-800 mg/dL).
3. A patient with systemic lupus erythematosus (SLE) is prescribed
prednisone, a corticosteroid, to reduce inflammation and suppress
the immune system. The nurse educates the patient about the
adverse effects of long-term corticosteroid use. Which of the
following statements by the patient indicates a need for further
teaching?
A) "I should avoid contact with people who are sick or have
infections."
B) "I should take calcium and vitamin D supplements to prevent
osteoporosis."
C) "I should check my blood pressure and blood sugar regularly."
D) "I should stop taking prednisone when my symptoms improve."
*Answer: D) "I should stop taking prednisone when my symptoms
improve."*
Rationale: Corticosteroids should not be stopped abruptly, as this
can cause adrenal insufficiency, hypotension, and shock.
Corticosteroids should be tapered gradually under the supervision
of a health care provider. The other statements are correct, as
corticosteroids can increase the risk of infection, osteoporosis,
hypertension, and hyperglycemia.
PART B:
What are the main differences between fetal and adult
hemoglobin? How do they affect oxygen transport and affinity?
- Fetal hemoglobin (HbF) has a higher affinity for oxygen than adult
, hemoglobin (HbA) because it has two gamma chains instead of two beta
chains. This allows HbF to bind oxygen more tightly and extract it from
maternal blood in the placenta. HbF also has a lower affinity for 2,3-
bisphosphoglycerate (2,3-BPG), a molecule that reduces oxygen affinity
in HbA. Therefore, HbF can maintain a high oxygen saturation even at
low partial pressures of oxygen.
1. Whatare the main factors that influence growth hormone secretion
throughout the life span? How do they affect growth and metabolism?
- Growth hormone (GH) secretion is influenced by several factors, such
as age, sex, circadian rhythm, stress, exercise, nutrition, and feedback
from insulin-like growth factor 1 (IGF-1). GH secretion is highest during
childhood and puberty, when it stimulates linear growth and bone
development. GH secretion declines with age, leading to reduced
muscle mass, bone density, and metabolic rate. GH secretion is also
higher in males than females, and follows a diurnal pattern with a peak
during deep sleep. Stress, exercise, and fasting can increase GH
secretion, while obesity, hyperglycemia, and aging can decrease it.
2. What are the main changes in cardiovascular function that occur
during aging? How do they affect blood pressure, cardiac output, and
oxygen delivery?
- Aging causes several changes in cardiovascular function, such as
increased arterial stiffness, reduced compliance, increased peripheral
resistance, reduced baroreceptor sensitivity, reduced cardiac reserve,
and impaired endothelial function. These changes can lead to increased
systolic blood pressure, decreased diastolic blood pressure, increased
pulse pressure, reduced stroke volume, reduced cardiac output,
reduced coronary blood flow, and reduced oxygen delivery to the
tissues. These changes can also increase the risk of hypertension,
atherosclerosis, ischemic heart disease, heart failure, and arrhythmias.
Advanced
Pathophysiology
COMPLETED EXAM
2024
,1. A patient with chronic obstructive pulmonary disease (COPD)
presents with dyspnea, wheezes, and productive cough. The nurse
suspects that the patient has developed a respiratory infection.
Which of the following laboratory tests would be most useful to
confirm the diagnosis?
A) Arterial blood gas (ABG) analysis
B) Sputum culture and sensitivity
C) Chest x-ray
D) Pulmonary function tests (PFTs)
*Answer: B) Sputum culture and sensitivity*
Rationale: Sputum culture and sensitivity can identify the causative
organism and the appropriate antibiotic therapy for a respiratory
infection. ABG analysis can assess the gas exchange and acid-base
balance, but it does not indicate the presence of infection. Chest x-
ray can show the extent of lung damage, but it cannot differentiate
between infection and other causes of inflammation. PFTs can
measure the airflow and lung volumes, but they are not specific for
infection.
2. A patient with type 1 diabetes mellitus is admitted to the hospital
with diabetic ketoacidosis (DKA). The nurse monitors the patient's
fluid and electrolyte status closely. Which of the following findings
would indicate a complication of DKA?
A) Serum sodium level of 140 mEq/L
B) Serum potassium level of 3.2 mEq/L
C) Serum bicarbonate level of 18 mEq/L
D) Serum glucose level of 250 mg/dL
*Answer: B) Serum potassium level of 3.2 mEq/L*
Rationale: Serum potassium level of 3.2 mEq/L indicates
hypokalemia, which is a common complication of DKA due to
osmotic diuresis, insulin therapy, and metabolic acidosis. Serum
sodium level of 140 mEq/L is within the normal range (135-145
mEq/L). Serum bicarbonate level of 18 mEq/L is low, but it is
expected in DKA due to metabolic acidosis. Serum glucose level of
,250 mg/dL is high, but it is lower than the typical range for DKA
(300-800 mg/dL).
3. A patient with systemic lupus erythematosus (SLE) is prescribed
prednisone, a corticosteroid, to reduce inflammation and suppress
the immune system. The nurse educates the patient about the
adverse effects of long-term corticosteroid use. Which of the
following statements by the patient indicates a need for further
teaching?
A) "I should avoid contact with people who are sick or have
infections."
B) "I should take calcium and vitamin D supplements to prevent
osteoporosis."
C) "I should check my blood pressure and blood sugar regularly."
D) "I should stop taking prednisone when my symptoms improve."
*Answer: D) "I should stop taking prednisone when my symptoms
improve."*
Rationale: Corticosteroids should not be stopped abruptly, as this
can cause adrenal insufficiency, hypotension, and shock.
Corticosteroids should be tapered gradually under the supervision
of a health care provider. The other statements are correct, as
corticosteroids can increase the risk of infection, osteoporosis,
hypertension, and hyperglycemia.
PART B:
What are the main differences between fetal and adult
hemoglobin? How do they affect oxygen transport and affinity?
- Fetal hemoglobin (HbF) has a higher affinity for oxygen than adult
, hemoglobin (HbA) because it has two gamma chains instead of two beta
chains. This allows HbF to bind oxygen more tightly and extract it from
maternal blood in the placenta. HbF also has a lower affinity for 2,3-
bisphosphoglycerate (2,3-BPG), a molecule that reduces oxygen affinity
in HbA. Therefore, HbF can maintain a high oxygen saturation even at
low partial pressures of oxygen.
1. Whatare the main factors that influence growth hormone secretion
throughout the life span? How do they affect growth and metabolism?
- Growth hormone (GH) secretion is influenced by several factors, such
as age, sex, circadian rhythm, stress, exercise, nutrition, and feedback
from insulin-like growth factor 1 (IGF-1). GH secretion is highest during
childhood and puberty, when it stimulates linear growth and bone
development. GH secretion declines with age, leading to reduced
muscle mass, bone density, and metabolic rate. GH secretion is also
higher in males than females, and follows a diurnal pattern with a peak
during deep sleep. Stress, exercise, and fasting can increase GH
secretion, while obesity, hyperglycemia, and aging can decrease it.
2. What are the main changes in cardiovascular function that occur
during aging? How do they affect blood pressure, cardiac output, and
oxygen delivery?
- Aging causes several changes in cardiovascular function, such as
increased arterial stiffness, reduced compliance, increased peripheral
resistance, reduced baroreceptor sensitivity, reduced cardiac reserve,
and impaired endothelial function. These changes can lead to increased
systolic blood pressure, decreased diastolic blood pressure, increased
pulse pressure, reduced stroke volume, reduced cardiac output,
reduced coronary blood flow, and reduced oxygen delivery to the
tissues. These changes can also increase the risk of hypertension,
atherosclerosis, ischemic heart disease, heart failure, and arrhythmias.
