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 A
Explanation
A. Prinzmetal or variant angina: Prinzmetal angina, also known as variant angina, is characterized by episodes of chest pain due to vasospasms of the coronary arteries. This type of angina can occur unpredictably, often at rest, and is associated with transient ischemia of the heart muscle.
B. Unstable angina: Unstable angina is characterized by sudden, unpredictable chest pain that occurs at rest or with minimal exertion and may last longer than stable angina. It indicates a significant risk of myocardial infarction but is not primarily caused by vasospasm.
C. Angina pectoris: Angina pectoris is a general term for chest pain due to ischemia, which can be stable or unstable. It does not specifically refer to the vasospasm that defines Prinzmetal angina.
D. Stable angina: Stable angina is characterized by predictable chest pain that occurs with exertion or stress and is relieved by rest or nitroglycerin. It is not associated with coronary artery vasospasms.
Correct Answer is ["C","F"]
Explanation
A. Fever: Fever is a common sign of pericarditis, often indicating inflammation or infection in the pericardial sac. This symptom is typical in patients with this condition.
B. Mild chest pain: Mild chest pain is a typical symptom of pericarditis. Patients often experience sharp, pleuritic chest pain that may worsen with inspiration or coughing.
C. No evidence of fatigue: Fatigue can be a common symptom in patients with pericarditis due to the body's response to inflammation. Therefore, the absence of fatigue is not typical, making this an appropriate choice.
D. Myalgias: Myalgias or muscle aches can occur in pericarditis as part of the systemic inflammatory response. This symptom is not unusual in patients with this condition.
E. Pericardial friction rub: A pericardial friction rub is a characteristic finding in pericarditis, heard during auscultation. It results from the movement of inflamed pericardial layers against each other.
F. Radiating substernal pain felt in the left shoulder: This type of radiating pain is more characteristic of myocardial ischemia or angina rather than pericarditis. While pericarditis can cause chest pain, it does not typically radiate in the same manner as that seen in cardiac conditions, making this an appropriate choice.
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