Respiratory Mechanics in Critical Care
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Questions and Answers

What is the purpose of the trigger variable in mechanical ventilation?

  • To control a parameter during expiration
  • To generate the actual force needed to deliver gas under pressure
  • To end inspiration when a preset value is reached
  • To maintain a preset level before inspiration ends (correct)
  • Which of the following can serve as a target variable in mechanical ventilation?

  • Drive Mechanism
  • FiO2
  • Flow Rate
  • Volume (correct)
  • What determines the end of the inspiratory phase in mechanical ventilation?

  • Volume
  • Drive Mechanism
  • Time
  • Pressure (correct)
  • Which system in mechanical ventilation generates the actual force needed to deliver gas under pressure?

    <p>Drive Mechanism</p> Signup and view all the answers

    What is the baseline variable controlled during expiration in mechanical ventilation?

    <p>Baseline Variable</p> Signup and view all the answers

    Which variable can be either a direct application of compressed gas or an indirect application via an electrical motor or compressor in ventilators?

    <p>Flow Rate</p> Signup and view all the answers

    What effect does low lung compliance have on the transmission of pressure to the thoracic cavity?

    <p>The pressure transmitted to the thoracic cavity is much less</p> Signup and view all the answers

    How should Mean Airway Pressure (mPaw) and Cardiac Output be managed?

    <p>Keep PIP, I Time, RR, and PEEP at minimum levels</p> Signup and view all the answers

    In hypovolemic patients, what effect does Positive Pressure Ventilation (PPV) have on pulmonary venous return to the Left ventricle?

    <p>Results in a decrease in pulmonary venous return</p> Signup and view all the answers

    What is a characteristic of Pulsus Paradoxus seen in patients with asthma?

    <p>Spontaneous decrease in systolic blood pressure</p> Signup and view all the answers

    How does PPV affect pulmonary blood flow entering and leaving the heart?

    <p>Decreases pulmonary blood flow entering and leaving the heart</p> Signup and view all the answers

    What is one reason for an increase in pulmonary venous return to the Left ventricle in hypertensive patients under PPV?

    <p>Compression of pulmonary blood vessels is minimal</p> Signup and view all the answers

    What is the most practical baseline variable used in all modern ventilators?

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

    Which of the following waveforms are of interest during ventilatory support?

    <p>Pressure, volume, and flow</p> Signup and view all the answers

    In positive pressure ventilation, which of the following is used to bring air into the lungs?

    <p>Positive pressure</p> Signup and view all the answers

    What are the three types of positive pressure ventilation?

    <p>Volume type, Pressure type, Flow type</p> Signup and view all the answers

    Which of the following considerations is important in positive pressure ventilation for cardiovascular health?

    <p>Pulmonary Blood Flow</p> Signup and view all the answers

    What is a key factor to be assessed concerning pulmonary function in mechanical ventilation?

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

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