Respiratory Tract
Clue: The upper respiratory tract (nasal cavity, pharynx, larynx) filters, warms, and humidifies incoming air. Explain why these functions are clinically important for protecting the lower airways and alveoli.
Answer: What is: they trap and remove particles and pathogens (mucus, cilia), warm air to body temperature, and add moisture so that lower airways and alveoli are less irritated or damaged and gas exchange surfaces remain intact and functional?
Clue: Compared with the systemic circulation, the pulmonary circulation is described as this type of pressure system.
Answer: What is a low‑pressure system?
Clue: With normal aging, the chest wall becomes stiffer. How does this change affect lung expansion?
Answer: What is it makes lung expansion more difficult, reducing chest wall compliance?
Clue: This common respiratory infection is an inflammation of the bronchi, often following a cold, and is characterized by a cough that may be dry or produce sputum.
Answer: What is acute bronchitis?
Clue: ARDS is a severe form of respiratory failure that usually develops after a serious illness or injury. What is the main problem in the lungs in ARDS?
Answer: What is diffuse inflammation and injury of the alveoli and capillaries, causing fluid to leak into the alveoli and severely impair gas exchange?
Clue: A patient with severe nasal congestion and mouth breathing complains of a dry throat and cough. Relate this to the normal roles of the upper respiratory tract and explain why these symptoms occur.
Answer: What is: because the nose normally filters, warms, and humidifies air; when breathing mostly through the mouth, air is cooler, drier, and less filtered, causing dryness and irritation of the pharynx and lower airways, which can trigger coughing?
Clue: Trace the main path of blood flow through the pulmonary circulation, starting at the right ventricle and ending at the left atrium.
Answer: What is: right ventricle → pulmonary arteries → capillaries around the alveoli → pulmonary veins → left atrium?
Clue: In older adults, respiratory muscles (like the diaphragm and intercostals) often become weaker. Name one consequence of this change.
Answer: What is reduced cough strength, decreased vital capacity, or increased work of breathing (any one)?
Clue: This condition is an acute infection of the lung parenchyma, commonly causing fever, cough, sputum production, pleuritic chest pain, and abnormal lung sounds such as crackles.
Answer: What is pneumonia?
Clue: Name one common risk factor or trigger that can lead to the development of ARDS.
Answer: What is severe pneumonia, sepsis, major trauma, aspiration of gastric contents, or massive transfusion (any one)?
Clue: The conducting zone extends from the trachea down to the terminal bronchioles and does not participate in gas exchange. What is the clinical term for the volume of air in these structures, and why does it matter when providing oxygen therapy or ventilation?
Answer: What is anatomical dead space, and it matters because this volume of air does not take part in gas exchange, so tidal volume and oxygen delivery must be sufficient to ensure that air reaching the respiratory zone (beyond dead space) can support effective oxygenation and CO₂ removal?
Clue: The bronchial circulation has a different role than the pulmonary circulation. What does the bronchial circulation supply?
Answer: What is oxygenated blood to the airway walls and supporting lung tissues?
Clue: Aging causes a gradual loss of alveolar surface area and elasticity. How does this affect gas exchange?
Answer: What is it decreases the area and efficiency for O₂ and CO₂ exchange, contributing to lower PaO₂ and less reserve?
Clue: This chronic respiratory disease is characterized by airway inflammation and reversible bronchoconstriction, often triggered by allergens, exercise, or cold air.
Answer: What is asthma?
Clue: Despite giving high levels of oxygen, patients with ARDS can remain hypoxemic. Explain briefly why oxygen alone often doesn’t correct the hypoxemia.
Answer: What is because fluid‑filled or collapsed alveoli cannot participate in gas exchange, so blood passes through poorly ventilated areas (severe V/Q mismatch/shunt), and even high FiO₂ cannot reach enough functional alveoli?
Clue: The respiratory zone (respiratory bronchioles, alveolar ducts, alveoli) is the site of gas exchange. Describe one pathophysiologic change in this zone that would impair gas exchange and link it to a common respiratory condition.
Answer: What is: thickening or fluid filling of the alveolar walls/space (e.g., in pneumonia or pulmonary edema), loss of alveolar surface area (e.g., emphysema), or collapse of alveoli (atelectasis), all of which reduce diffusion or surface area and impair O₂/CO₂ exchange?
Clue: Define ventilation (V) and perfusion (Q) in the context of V/Q matching.
Answer: What is: ventilation is air reaching the alveoli, and perfusion is blood reaching the alveolar capillaries?
Clue: The cough and mucociliary clearance mechanisms decline with age. What does this change mean for the risk of respiratory infection in older adults?
Answer: What is an increased risk of infections (like pneumonia) because secretions and pathogens are cleared less effectively?
In a patient with advanced COPD, some areas of the lung are well perfused but receive very little ventilation because of airway obstruction and air trapping. Explain how this situation creates a V/Q mismatch and why it leads to hypoxemia.
Answer:
What is: COPD causes low ventilation (V) to areas with normal blood flow (Q), so blood passes through poorly ventilated alveoli, picks up too little oxygen, and returns to the systemic circulation under‑oxygenated, resulting in V/Q mismatch and hypoxemia?
Clue: You are caring for an intubated patient with ARDS on mechanical ventilation. Name two priority nursing assessments you should do frequently to monitor their respiratory status.
Answer: *What are any two of:
Clue: A patient has bronchoconstriction that mainly affects the bronchi and bronchioles of the conducting zone. Explain how this changes airflow and work of breathing, and why gas exchange in the respiratory zone may still be inadequate even if alveoli are structurally normal.
Answer: What is: narrowing of bronchi/bronchioles increases airway resistance, making it harder to move air in and out (greater work of breathing, wheeze, dyspnea); less air reaches the respiratory zone, so alveoli receive reduced ventilation, leading to hypoxemia and possible hypercapnia despite structurally normal alveoli, because ventilation–perfusion matching is impaired?
Clue: V/Q mismatch leads to hypoxemia. Give one example of a condition where ventilation is okay but perfusion is decreased, and one where perfusion is okay but ventilation is decreased.
Answer:
Clue: Because of age‑related changes in ventilation, perfusion, and lung elasticity, older adults often have less respiratory reserve. Give one nursing implication of this when caring for an older patient with acute illness or surgery.
Answer: What is: monitor closely for hypoxia and respiratory fatigue; use early deep‑breathing/coughing and incentive spirometry; mobilize early; be cautious with sedatives/opioids that depress respiration (any one clear implication).
Clue: A patient with a confirmed PE is started on anticoagulation. As the nurse, describe one priority assessment related to the PE itself and one priority assessment related to the risks of anticoagulant therapy.
Answer: *What is:
Clue: Patients with ARDS are typically ventilated with low tidal volumes and may be placed in the prone position. Explain the purpose of one of these strategies (choose one) in improving oxygenation. This was common during COVID-19.
Answer:
*What is: