3.5 Quiz 1
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Questions and Answers

What is the dominant feature of hypoventilation?

  • Hypercapnia (correct)
  • Respiratory alkalosis
  • Alkalosis
  • Hypoxemia
  • What is a common finding in patients with central sleep apnea?

  • Loud snoring
  • Effort without airflow
  • Apneic periods of no respiratory effort (correct)
  • Obstruction during inspiration
  • How does CPAP help in the treatment of sleep apnea?

  • Increases risk of CV complications
  • Raises pressure inside airways (correct)
  • Causes daytime somnolence
  • Induces sleep disordered breathing
  • What is the main cause of low FiO2 leading to hypoxemic hypoxia?

    <p>High altitude</p> Signup and view all the answers

    What are two cardinal features of hypoventilation?

    <p>Rise in PCO2 and alveolar hypoxia</p> Signup and view all the answers

    What is the most common cause of hypoxemia according to the text?

    <p>Ventilation-perfusion inequality</p> Signup and view all the answers

    Which gas transfer is affected by ventilation-perfusion inequality?

    <p>All gases - O2, CO2, anesthetic gases</p> Signup and view all the answers

    In obstructive diseases, increased resistance to expiratory airflow primarily occurs due to which process?

    <p>Hypertrophy of smooth muscle in the airway wall</p> Signup and view all the answers

    What exacerbates ventilation-perfusion inequality according to the text?

    <ol> <li>Hypoventilation and 2) decreased cardiac output</li> </ol> Signup and view all the answers

    Which condition is specifically mentioned in the text as contributing to the fundamental physiologic problem in obstructive diseases?

    <p>Emphysema</p> Signup and view all the answers

    In a patient with hypoventilation, which of the following is a characteristic finding?

    <p>Decreased respiratory rate</p> Signup and view all the answers

    Which of the following is a common cause of respiratory acidosis?

    <p>Obstructive lung disease</p> Signup and view all the answers

    What differentiates obstructive sleep apnea from central sleep apnea?

    <p>Increased respiratory effort in central sleep apnea</p> Signup and view all the answers

    Which of the following is NOT a feature of central sleep apnea?

    <p>Associated with loud snoring</p> Signup and view all the answers

    What is a potential consequence of untreated sleep apnea?

    <p>Increased risk of stroke</p> Signup and view all the answers

    Which condition can lead to the depression of respiratory centers by drugs like opiates?

    <p>Hemorrhage diseases of the medulla</p> Signup and view all the answers

    What is a characteristic of diseases of the nerves to respiratory muscles like in Guillain-Barre syndrome?

    <p>Hypercapnia</p> Signup and view all the answers

    Which condition may cause upper airway obstruction, leading to obstructive sleep apnea?

    <p>Duchenne muscular dystrophy</p> Signup and view all the answers

    In the context of hypoxemic hypoxia, what effect does diffusion impairment have across the alveolar-capillary unit?

    <p>Impaired gas exchange between blood and alveoli</p> Signup and view all the answers

    Which type of shunt allows blood to bypass ventilated lung regions and does not respond to 100% O2 therapy?

    <p>Right-to-Left Shunt</p> Signup and view all the answers

    What is the main physiological factor that contributes to hypoventilation in patients with severe chronic lung disease?

    <p>Worsening of ventilation-perfusion relationships</p> Signup and view all the answers

    Which condition may lead to hypercapnic respiratory failure when exposed to excessive oxygen therapy?

    <p>Chronic obstructive pulmonary disease (COPD)</p> Signup and view all the answers

    What is a common hazard associated with oxygen therapy mentioned in the text?

    <p>CO2 retention</p> Signup and view all the answers

    Which type of sleep apnea is commonly treated with continuous positive airway pressure (CPAP) postoperatively?

    <p>Obstructive sleep apnea (OSA)</p> Signup and view all the answers

    In mechanical ventilation, which mode delivers a known volume despite changes in lung properties or airway resistance?

    <p>Volume control</p> Signup and view all the answers

    Which of the following is a potential cause of hypoventilation?

    <p>Excessive oxygen therapy</p> Signup and view all the answers

    What is a common feature of both obstructive sleep apnea and central sleep apnea?

    <p>Decreased oxygen saturation in the blood</p> Signup and view all the answers

    In respiratory acidosis, which of the following compensatory mechanisms is expected to occur?

    <p>Increased blood bicarbonate levels</p> Signup and view all the answers

    What is a potential hazard associated with central sleep apnea?

    <p>Increased risk of heart attack</p> Signup and view all the answers

    Which of the following best describes a characteristic of obstructive sleep apnea?

    <p>Intermittent airflow obstruction during sleep</p> Signup and view all the answers

    What is the characteristic arterial blood gas finding in patients with respiratory acidosis?

    <p>Decreased pH and increased PaCO2</p> Signup and view all the answers

    Which condition is characterized by decreased sensitivity of central chemoreceptors to changes in PaCO2?

    <p>Central sleep apnea</p> Signup and view all the answers

    What is a common feature in patients with chronic bronchitis?

    <p>Elevated jugular venous pressure</p> Signup and view all the answers

    Which factor contributes to luminal narrowing in chronic bronchitis?

    <p>Increased mucus production</p> Signup and view all the answers

    What is the primary cause of COPD in developing populations?

    <p>Indoor exposure to burning biofuels</p> Signup and view all the answers

    Which type of emphysema is usually associated with alpha-1 antitrypsin deficiency?

    <p>Panacinar emphysema</p> Signup and view all the answers

    Which feature distinguishes emphysema from chronic bronchitis?

    <p>Irreversible enlargement of airspaces distal to terminal bronchioles</p> Signup and view all the answers

    What is a clinical feature specific to chronic bronchitis?

    <p>Purulent sputum from bacterial infection</p> Signup and view all the answers

    Which condition can lead to hypercapnia and respiratory acidosis in patients with COPD?

    <p>Administration of high FiO2 levels</p> Signup and view all the answers

    What is a characteristic feature of hypoventilation that may be observed in COPD patients?

    <p>Elevated PaCO2 levels with normal pH levels</p> Signup and view all the answers

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