Oxygen Delivery Devices, Oxygen Therapy and Airway Management
Anaesthesiology · Topic 11
Source: NMC CBME Curriculum 2024 · Volume III · Anaesthesiology · Topic 11 · combined PDF page 455
Practice questions
- Which combination best describes the principal physiological mechanisms attributed to high-flow nasal cannula oxygen therapy?
- A patient on HFNC opens their mouth. Which change is most consistent with the cited physiological crossover study?
- In the 10-patient crossover comparison, which device generated the highest mean tracheal airway pressure?
- Which statement best characterizes the pressure effect of Optiflow in the cited crossover study?
- Which device in the physiological comparison produced airway pressure close to zero?
- In the cited study, which systems reached the highest reported tracheal FiO2, approximately 90%?
- A clinician assumes the oxygen device producing the greatest airway pressure must also produce the greatest tracheal FiO2. Which finding from the crossover study best challenges this assumption?
- In the crossover study, increasing oxygen flow generally had which effect across the three devices?
- Which tested system provided positive inspiratory as well as expiratory airway pressure?
- Which system was associated with lower discomfort than Boussignac in the cited study?
- A trainee generalizes the tracheal FiO2 and pressure results from the device comparison to every patient and setting. What is the most appropriate interpretation?
- Which feature of HFNC is most directly associated with reduction of nasopharyngeal dead space?
- Why can HFNC provide a more stable inspired oxygen concentration than a conventional oxygen system?
- A patient with acute hypoxaemic respiratory failure is being considered for HFNC. Which statement best reflects the evidence summarized in the supplied review?
- According to the supplied pediatric HFNC review, which condition has the clearest support for HFNC use?
- A child with an asthma exacerbation is being considered for HFNC instead of CPAP or non-invasive ventilation. Which evidence statement is most accurate?
- A child with sleep-disordered breathing is considered for HFNC. Which conclusion is best supported by the supplied review?
- Which statement about warmed and humidified HFNC gas is best supported by the supplied review?
- Which group of clinical applications is specifically described for nasal high flow in the supplied review?
- A patient is being assessed for long-term domiciliary oxygen. Which clinical problem is the principal treatment target described in the supplied review?
- In which disease group is domiciliary oxygen most commonly prescribed according to the supplied review?
- Which outcome is described in the supplied review as a potential benefit of domiciliary oxygen for appropriately selected patients with chronic hypoxaemia?
- Besides survival, which set of goals is described for domiciliary oxygen therapy?
- Which set contains delivery systems identified for domiciliary oxygen therapy in the supplied review?
- What is the stated purpose of oxygen-conserving devices attached to domiciliary oxygen systems?
- Why does the supplied domiciliary oxygen review emphasize appropriate patient selection and reassessment?
- A learner argues that HFNC's positive airway pressure means it is equivalent to CPAP. Which response is most accurate?
- A patient is receiving HFNC as support for acute respiratory illness. Which monitoring principle follows most directly from the evidence summarized in the reviews?
- Which statement best differentiates an oxygen-delivery device's physiological performance from proof of clinical benefit?