Question

A client is brought to the Emergency Department (ED) after an opioid overdose. The client is breathing very slowly at 8 breathes per minute. An arterial blood gas (ABG) is drawn and shows a pH of 7.2. HCO3 23 mEq/L, CO2 50 mmHg. What acid base imbalance does this client have?

Answer 1

Correct Answers:

Respiratory acidosis

Rationale :

🎀 Primary problem identification: The pH of 7.2 indicates acidemia, meaning the blood is too acidic.

🎀 Respiratory component analysis: The PaCO₂ is elevated at 50 mmHg, showing carbon dioxide retention, which points to a respiratory cause.

🎀 Metabolic component status: The HCO₃⁻ level of 23 mEq/L is within normal range, indicating the kidneys have not yet compensated.

🎀 Clinical correlation: The client is breathing very slowly (8 breaths/min) due to opioid-induced respiratory depression, leading to hypoventilation.

🎀 Overall interpretation: Acidic pH + high CO₂ + normal bicarbonate = acute respiratory acidosis.

Metabolic acidosis

🎀 Would present with low pH and low HCO₃⁻, which is not seen here.

🎀 The bicarbonate level is normal, ruling out a primary metabolic cause.

Respiratory alkalosis

🎀 Characterized by low PaCO₂ due to hyperventilation, not hypoventilation.

🎀 This client has elevated CO₂, the opposite pattern.

Metabolic alkalosis

🎀 Would show elevated pH and elevated HCO₃⁻.

🎀 The client is acidotic, not alkalotic.

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Answer 2

Correct Answers:

Hyperkalemia

Rationale :

🎀 Key ECG finding: Peaked T waves are a classic and early electrocardiographic sign of elevated potassium levels.

🎀 Neuromuscular effects: Restlessness can occur due to altered neuromuscular excitability associated with excess potassium.

🎀 Cardiovascular impact: Hyperkalemia can impair cardiac conduction and contractility, contributing to hypotension.

🎀 Physiologic mechanism: Elevated potassium reduces the resting membrane potential, making cardiac cells less excitable and prone to dysrhythmias.

🎀 Clinical significance: Hyperkalemia is life-threatening and requires prompt recognition and intervention due to the risk of fatal arrhythmias.

Hypokalemia

🎀 Typically causes flat or inverted T waves and U waves, not peaked T waves.

🎀 More often associated with muscle weakness and dysrhythmias, not this ECG pattern.

Hyponatremia

🎀 Primarily affects neurologic status (confusion, seizures), not T-wave morphology.

🎀 Does not cause characteristic peaked T waves on ECG.

Hypernatremia

🎀 Presents with cellular dehydration and neurologic symptoms such as lethargy.

🎀 Does not produce the distinct ECG changes seen here

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Answer 3

Correct Answers:

Client stopped taking antibiotics two days early as he was feeling better
Client took one pill a day instead of the two that were prescribed
The cause of the client's illness was viral, not bacterial

Rationale :

🎀 Early discontinuation of antibiotics prevents complete eradication of the pathogen, allowing remaining organisms to survive and continue causing symptoms.

🎀 Incorrect dosing (underdosing) results in subtherapeutic drug levels, which are insufficient to eliminate the infection and may contribute to resistance.

🎀 Viral infections do not respond to antibiotics, so symptoms will persist regardless of adherence if the illness is not bacterial.

Client took the antibiotics exactly as they were prescribed

🎀 Proper adherence supports effective treatment and is unlikely to cause persistent infection.

🎀 This behavior typically leads to symptom resolution when the cause is bacterial and the antibiotic is appropriate.

Culture and sensitivity data showed that the antibiotics would be effective

🎀 Appropriate culture and sensitivity results indicate the organism should respond to therapy.

🎀 This finding supports effectiveness rather than explaining treatment failure.

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Answer 4

Correct Answers:

First to arrive during inflammation
Increased with bacterial infections
Primary role is phagocytosis

Rationale :

🎀 Early responders: Neutrophils are the first white blood cells to migrate to sites of acute inflammation and infection.

🎀 Infection pattern: Neutrophil counts increase in bacterial infections, making them a key marker in acute bacterial processes.

🎀 Main function: Their primary role is phagocytosis, where they ingest and destroy bacteria and cellular debris.

Release histamine

🎀 Histamine release is characteristic of basophils and mast cells, not neutrophils.

🎀 Neutrophils focus on ingestion and destruction of pathogens, not mediator release.

Part of the adaptive immune system

🎀 Neutrophils belong to the innate immune system, which provides immediate, nonspecific defense.

🎀 The adaptive immune system involves lymphocytes such as B cells and T cells.

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Answer 5

Correct Answers:

Weak bones and positive Trousseau's sign

Rationale :

🎀 Pathophysiology link: End-stage renal disease impairs vitamin D activation, reducing calcium absorption and leading to hypocalcemia.

🎀 Neuromuscular excitability: Low calcium increases nerve and muscle excitability, producing Trousseau’s sign (carpal spasm with BP cuff inflation).

🎀 Skeletal effects: Chronic hypocalcemia causes bone demineralization, resulting in weak or fragile bones.

🎀 Clinical hallmark: Tetany signs (e.g., Trousseau’s) are classic indicators of low calcium levels.

🎀 Diagnostic consistency: These findings align directly with hypocalcemia rather than fluid or potassium disturbances.

Kidney stones and peaked T waves on ECG

🎀 Kidney stones are more consistent with hypercalcemia, not hypocalcemia.

🎀 Peaked T waves indicate hyperkalemia, a different electrolyte imbalance.

Peripheral edema and dry tongue

🎀 Peripheral edema suggests fluid overload.

🎀 Dry tongue points to dehydration—neither is specific to hypocalcemia.

Low blood pressure and tachycardia

🎀 These are nonspecific findings seen in volume depletion or shock states.

🎀 They are not hallmark signs of low calcium.

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Answer 6

Correct Answers:

CD4 cell count less than 200 cells/mm3

Rationale :

🎀 Diagnostic criterion: Progression from HIV to AIDS is defined by a CD4 count < 200 cells/mm³ or the presence of AIDS-defining illnesses.

🎀 Immune suppression: A CD4 count below this threshold reflects severe immunodeficiency, with markedly reduced ability to fight infections.

🎀 Clinical implication: At this level, clients are at high risk for opportunistic infections and malignancies.

🎀 Staging marker: CD4 count is a key marker used to stage HIV disease and guide prophylaxis and treatment decisions.

🎀 Consistency with guidelines: This cutoff is used universally in clinical practice to identify AIDS.

Development of a superficial fungal infection on the hand

🎀 Superficial fungal infections can occur in immunocompetent individuals.

🎀 They are not AIDS-defining conditions.

Development of a mild upper respiratory infection

🎀 Mild URIs are common and nonspecific.

🎀 They do not indicate progression to AIDS.

CD4 count greater than 500 cells/mm³

🎀 This reflects relatively preserved immune function.

🎀 It is inconsistent with a diagnosis of AIDS.

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Answer 7

Correct Answers:

Decrease in blood pressure

Rationale :

🎀 Primary trigger: The kidneys release renin in response to decreased renal perfusion, which commonly occurs with low blood pressure.

🎀 Physiologic sensing: Specialized cells in the kidney (juxtaglomerular cells) detect reduced blood flow or pressure and initiate RAAS activation.

🎀 System purpose: The Renin-Angiotensin-Aldosterone System (RAAS) functions to raise blood pressure and restore adequate circulation.

🎀 Hormonal cascade: Renin release leads to production of angiotensin II, causing vasoconstriction and aldosterone secretion, which increases sodium and water retention.

🎀 Clinical relevance: RAAS activation is common in conditions like hypotension, dehydration, hemorrhage, and heart failure.

Increase in vascular tone

🎀 Increased vascular tone already supports higher blood pressure.

🎀 This would suppress, not stimulate, renin release.

Decrease in vascular tone

🎀 Decreased vascular tone alone is not the direct renal trigger.

🎀 The kidneys respond specifically to low perfusion pressure, not vessel tone changes alone.

Increase in blood pressure

🎀 Elevated blood pressure inhibits renin release through negative feedback.

🎀 RAAS would be downregulated in this state.

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Answer 8

Correct Answers:

Respiratory alkalosis

Rationale :

🎀 Primary change: Hyperventilation causes excessive elimination of carbon dioxide (CO₂) from the lungs.

🎀 ABG effect: Loss of CO₂ reduces carbonic acid levels, leading to an increase in blood pH (alkalemia).

🎀 System involved: Because the imbalance is driven by respiratory rate, it is classified as a respiratory disorder.

🎀 Clinical trigger: Severe panic attacks stimulate rapid breathing, making respiratory alkalosis a common finding.

🎀 Physiologic result: Continued fast respirations maintain low PaCO₂, sustaining the alkalotic state.

Respiratory acidosis

🎀 Occurs with hypoventilation and CO₂ retention.

🎀 This is the opposite of the client’s condition.

Metabolic acidosis

🎀 Involves low bicarbonate due to metabolic causes such as renal failure or diarrhea.

🎀 Not caused by changes in breathing patterns alone.

Metabolic alkalosis

🎀 Results from excess bicarbonate or acid loss (e.g., vomiting).

🎀 Does not arise from hyperventilation.

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Answer 9

Correct Answers:

pH 7.3, HC03 18 mEq/L, C02 37 mEq/L

Rationale :

🎀 Primary pH change: A pH of 7.3 indicates acidemia, confirming an acid–base disorder.

🎀 Metabolic component: Low bicarbonate (HCO₃⁻ 18 mEq/L) reflects a metabolic acidosis, which is expected in severe renal failure due to impaired acid excretion.

🎀 Respiratory status: A normal CO₂ (37 mmHg) indicates no respiratory compensation has occurred.

🎀 No compensation definition: In uncompensated metabolic acidosis, the lungs have not yet lowered CO₂ to correct the pH.

🎀 Clinical correlation: Renal failure leads to acid retention and bicarbonate loss, producing this classic ABG pattern.

pH 7.3, HCO₃⁻ 24 mEq/L, CO₂ 50 mmHg

🎀 Normal bicarbonate with elevated CO₂ suggests a respiratory acidosis, not metabolic.

🎀 Does not match the diagnosis provided.

pH 7.3, HCO₃⁻ 30 mEq/L, CO₂ 50 mmHg

🎀 Elevated bicarbonate suggests metabolic alkalosis or compensation, not metabolic acidosis.

🎀 Inconsistent with renal failure–related acidosis.

pH 7.3, HCO₃⁻ 24 mEq/L, CO₂ 36 mmHg

🎀 Normal bicarbonate and CO₂ do not explain the acidic pH.

🎀 This pattern does not represent uncompensated metabolic acidosis.

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Answer 10

Correct Answers:

Commonly seen in children and impacts the T-cells and B

Rationale :

🎀 Epidemiology: Acute lymphoblastic leukemia (ALL) is the most common childhood leukemia, with peak incidence between ages 2–5 years.

🎀 Cell lineage: ALL arises from immature lymphoid cells, specifically B-cell or T-cell precursors.

🎀 Disease nature: It is an acute leukemia, meaning rapid onset and aggressive progression without treatment.

🎀 Bone marrow involvement: Malignant lymphoblasts crowd out normal marrow cells, leading to anemia, thrombocytopenia, and neutropenia.

🎀 Clinical relevance: Despite being aggressive, ALL in children has a high cure rate with appropriate chemotherapy.

Aggressive cancer seen in male clients that destroy the lymphoid cells

🎀 ALL can affect both sexes; it is not defined by male predominance alone.

🎀 The description is too nonspecific and incomplete.

Impacts all ages equally and is associated with the presence of Philadelphia chromosome

🎀 The Philadelphia chromosome is more characteristic of chronic myelogenous leukemia (CML) and some adult leukemias.

🎀 ALL does not affect all ages equally—it predominantly affects children.

Usually seen in adult clients and impacts the neutrophils

🎀 Neutrophil involvement is characteristic of acute myelogenous leukemia (AML).

🎀 ALL primarily affects lymphocytes, not neutrophils.

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Pathophysiology BIO280 exam 1

No.

1 :
A client is brought to the Emergency Department (ED) after an opioid overdose. The client is breathing very slowly at 8 breathes per minute. An arterial blood gas (ABG) is drawn and shows a pH of 7.2. HCO3 23 mEq/L, CO2 50 mmHg. What acid base imbalance does this client have?

2 :
Peaked T waves on EKG, restlessness and low blood pressure (hypotension) are consistent with which of the following electrolyte abnormalities?

3 :
A client was prescribed antibiotics for a sore throat. The client returns to the clinic one week later because his sore throat persists despite the treatment. Which of the following factors may have caused the illness to persist despite antibiotics? Select all that apply.

4 :
Neutrophils are a white blood cell (WBC) that have an important role in the immune system, Which of the following are characteristics of neutrophils? Select all that apply.

5 :
A client who has end stage renal disease was recently diagnosed with hypocalcemia. Which of the following signs and symptoms would indicate this electrolyte imbalance?

6 :
Which of the following would indicate that a client with Human Immunodeficiency Virus (HIV) has progressed to acquired immunodeficiency syndrome (AIDS)?

7 :
What causes the kidneys to release renin, activating the Renin-Angiotensin-Aldosterone System (RAAS)?

8 :
A client presents to the emergency department having a severe panic attack and hyperventilating, What acid base imbalance would the nurse anticipate if respirations continue to be too fast?

9 :
A client presents to the emergency department in severe renal failure. An arterial blood gas (ABG) is drawn and the health care provider tells the nurse that the client has metabolic acidosis with no compensation. What values does the nurse expect to see on an arterial blood gas (ABG)?

10 :
Which of the following characteristics best describe acute lymphoblastic leukemia (ALL)?

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Pathophysiology BIO280 exam 1

No.

1 : A client is brought to the Emergency Department (ED) after an opioid overdose. The client is breathing very slowly at 8 breathes per minute. An arterial blood gas (ABG) is drawn and shows a pH of 7.2. HCO3 23 mEq/L, CO2 50 mmHg. What acid base imbalance does this client have?

2 : Peaked T waves on EKG, restlessness and low blood pressure (hypotension) are consistent with which of the following electrolyte abnormalities?

3 : A client was prescribed antibiotics for a sore throat. The client returns to the clinic one week later because his sore throat persists despite the treatment. Which of the following factors may have caused the illness to persist despite antibiotics? Select all that apply.

4 : Neutrophils are a white blood cell (WBC) that have an important role in the immune system, Which of the following are characteristics of neutrophils? Select all that apply.

5 : A client who has end stage renal disease was recently diagnosed with hypocalcemia. Which of the following signs and symptoms would indicate this electrolyte imbalance?

6 : Which of the following would indicate that a client with Human Immunodeficiency Virus (HIV) has progressed to acquired immunodeficiency syndrome (AIDS)?

7 : What causes the kidneys to release renin, activating the Renin-Angiotensin-Aldosterone System (RAAS)?

8 : A client presents to the emergency department having a severe panic attack and hyperventilating, What acid base imbalance would the nurse anticipate if respirations continue to be too fast?

9 : A client presents to the emergency department in severe renal failure. An arterial blood gas (ABG) is drawn and the health care provider tells the nurse that the client has metabolic acidosis with no compensation. What values does the nurse expect to see on an arterial blood gas (ABG)?

10 : Which of the following characteristics best describe acute lymphoblastic leukemia (ALL)?

1 :
A client is brought to the Emergency Department (ED) after an opioid overdose. The client is breathing very slowly at 8 breathes per minute. An arterial blood gas (ABG) is drawn and shows a pH of 7.2. HCO3 23 mEq/L, CO2 50 mmHg. What acid base imbalance does this client have?

2 :
Peaked T waves on EKG, restlessness and low blood pressure (hypotension) are consistent with which of the following electrolyte abnormalities?

3 :
A client was prescribed antibiotics for a sore throat. The client returns to the clinic one week later because his sore throat persists despite the treatment. Which of the following factors may have caused the illness to persist despite antibiotics? Select all that apply.

4 :
Neutrophils are a white blood cell (WBC) that have an important role in the immune system, Which of the following are characteristics of neutrophils? Select all that apply.

5 :
A client who has end stage renal disease was recently diagnosed with hypocalcemia. Which of the following signs and symptoms would indicate this electrolyte imbalance?

6 :
Which of the following would indicate that a client with Human Immunodeficiency Virus (HIV) has progressed to acquired immunodeficiency syndrome (AIDS)?

7 :
What causes the kidneys to release renin, activating the Renin-Angiotensin-Aldosterone System (RAAS)?

8 :
A client presents to the emergency department having a severe panic attack and hyperventilating, What acid base imbalance would the nurse anticipate if respirations continue to be too fast?

9 :
A client presents to the emergency department in severe renal failure. An arterial blood gas (ABG) is drawn and the health care provider tells the nurse that the client has metabolic acidosis with no compensation. What values does the nurse expect to see on an arterial blood gas (ABG)?

10 :
Which of the following characteristics best describe acute lymphoblastic leukemia (ALL)?