What have you learned about ventilation?
Hypoventilation causes hypocapnia
Hypoventilation causes alkalosis
Hyperventilation causes acidosis
Hyperventilation causes hypocapnia
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["B","C","D"]
Explanation
A. Percutaneous coronary intervention: Percutaneous coronary intervention (PCI) is a treatment used to open blocked coronary arteries during a myocardial infarction but is not a complication of the event itself. It is a therapeutic procedure aimed at restoring blood flow and is not a direct consequence of myocardial infarction.
B. Sudden death: Sudden death can occur as a complication of myocardial infarction due to severe dysrhythmias or cardiac arrest resulting from electrical instability in the heart. This complication is critical and can occur shortly after the onset of an MI or during recovery.
C. Dysrhythmias: Dysrhythmias are common complications following myocardial infarction, often arising from ischemic damage to the heart muscle, which disrupts the normal electrical conduction pathways. These irregular heartbeats can range from benign to life-threatening.
D. Congestive heart failure: Congestive heart failure can develop as a complication of myocardial infarction due to the loss of functional cardiac muscle, resulting in decreased cardiac output and the heart's inability to pump effectively. This complication can develop acutely or progressively over time following an MI.
Correct Answer is A
Explanation
A. Assist with a chest tube insertion: A gunshot wound to the chest with a one-way valve pleural rupture indicates a tension pneumothorax, a life-threatening condition. Air enters the pleural space with each breath but cannot escape, leading to increased intrathoracic pressure, lung collapse, and mediastinal shift, which can compromise venous return and cardiac output. Immediate chest tube insertion or needle decompression is necessary to relieve pressure and restore normal lung function.
B. Give the patient low-flow oxygen: Oxygen therapy may help improve oxygenation, but it does not address the underlying issue of trapped air causing intrathoracic pressure buildup. Without intervention to release the trapped air, respiratory distress and cardiovascular collapse can occur.
C. Assess for clubbing of fingernails: Clubbing is a sign of chronic hypoxia seen in long-term respiratory diseases but is not relevant in the acute management of a tension pneumothorax. The priority is to relieve the trapped air and restore normal lung expansion.
D. Draw arterial gases: While arterial blood gases can help assess oxygenation and ventilation status, they do not treat the underlying tension pneumothorax. Immediate decompression is required before diagnostic tests to prevent rapid deterioration and potential cardiac arrest.
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