What have you learned about ventilation?

Hypoventilation causes hypocapnia

Hypoventilation causes alkalosis

Hyperventilation causes acidosis

Hyperventilation causes hypocapnia

Answer and Explanation

The Correct Answer is D

A. Hypoventilation causes hypocapnia: Hypoventilation leads to inadequate removal of carbon dioxide (CO₂), resulting in hypercapnia rather than hypocapnia. This occurs because decreased ventilation reduces gas exchange efficiency, allowing CO₂ to accumulate in the blood, which can cause respiratory acidosis.

B. Hypoventilation causes alkalosis: Hypoventilation leads to respiratory acidosis rather than alkalosis. When ventilation is insufficient, CO₂ builds up in the bloodstream, leading to an increase in hydrogen ion concentration and a subsequent drop in blood pH. This is commonly seen in conditions like chronic obstructive pulmonary disease (COPD), neuromuscular disorders, and opioid overdose.

C. Hyperventilation causes acidosis: Hyperventilation results in excessive elimination of CO₂, leading to a decrease in hydrogen ion concentration and an increase in blood pH, causing respiratory alkalosis rather than acidosis. Acidosis occurs when CO₂ retention leads to an increase in hydrogen ion concentration, which is the opposite of what happens with hyperventilation.

D. Hyperventilation causes hypocapnia: Hyperventilation leads to an excessive exhalation of CO₂, causing a reduction in blood CO₂ levels (hypocapnia). This can result in respiratory alkalosis, leading to symptoms such as dizziness, lightheadedness, tingling sensations, and even syncope. It is often seen in conditions like anxiety, panic attacks, fever, or high-altitude exposure.

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Correct Answer is ["B","C","E"]

Explanation

A. Pulse oximetry 98%: A pulse oximetry reading of 98% indicates adequate oxygen saturation, which does not strongly suggest a pneumothorax. Patients with a pneumothorax may have lower oxygen saturation levels, but this reading alone is not indicative of the condition.

B. Diminished breath sounds over painful chest area: Diminished breath sounds are a significant clinical manifestation of pneumothorax, as air in the pleural space prevents normal lung expansion and decreases airflow to the affected side.

C. Respiratory rate 34: An elevated respiratory rate (tachypnea) is often observed in patients with pneumothorax as they may struggle to breathe effectively. This clinical manifestation indicates respiratory distress and is consistent with the condition.

D. ABG pH level of 7.38: A pH level of 7.38 indicates acidosis, which may occur in cases of pneumothorax due to impaired gas exchange and respiratory distress. This abnormal finding on arterial blood gases supports the suspicion of pneumothorax.

E. Asymmetrical chest movements, especially on inspiration: Asymmetrical chest movements are a classic sign of pneumothorax, where the affected lung does not expand as fully as the unaffected lung during inspiration, leading to visible differences in chest wall movement.

A. A woman presenting with malaise, lethargy, and copious nasal secretions B. A man with a dry, stuffy nasopharynx, a sore throat, and temperature of 98.9°F C. A man complaining of general fatigue, a headache, and facial pain with a temperature of 100.9°F D. A woman complaining of generalized aches and who has a hoarse voice and reddened, painful upper airways

Correct Answer is C

Explanation

A. A woman presenting with malaise, lethargy, and copious nasal secretions: These symptoms are more indicative of a common cold or viral upper respiratory infection. While nasal secretions can occur in rhinosinusitis, the absence of facial pain or pressure suggests a cold rather than sinus involvement.

B. A man with a dry, stuffy nasopharynx, a sore throat, and temperature of 98.9°F: This presentation is typical of a common cold or upper respiratory infection. The symptoms of a dry, stuffy nasopharynx and sore throat are not specifically indicative of rhinosinusitis, which usually involves more pronounced nasal and facial symptoms.

C. A man complaining of general fatigue, a headache, and facial pain with a temperature of 100.9°F: This combination of symptoms strongly suggests rhinosinusitis. The presence of facial pain, headache, and fever indicates inflammation and infection of the sinuses, which is characteristic of rhinosinusitis rather than a common cold.

D. A woman complaining of generalized aches and who has a hoarse voice and reddened, painful upper airways: These symptoms align more closely with a viral upper respiratory infection or laryngitis. The absence of specific sinus-related symptoms such as facial pain or nasal obstruction makes rhinosinusitis less likely in this case.

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What have you learned about ventilation?

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Naxlex Comprehensive Predictor Exams

A patient arrives in the ED after an automobile accident. Which of the following clinical manifestations leads the nurse to suspect a pneumothorax? (Select all that apply) (Select All that Apply.)

Correct Answer is ["B","C","E"]

Explanation

Which of the following patients who presented to a walk-in medical clinic is most likely to be diagnosed wtih a rhinosinusitis rather than a common cold?

Correct Answer is C

Explanation

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