Pulmonary Mechanics in Side Lying Position Quiz
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Questions and Answers

In which region of the lungs does the ventilation gradient increase from upper to lower lungs?

  • Non-dependent lung region (correct)
  • Medial lung region
  • Middle lung region
  • Dependent lung region
  • What happens to the FRC (Functional Residual Capacity) in side-lying position compared to supine?

  • Intermittently changes (correct)
  • Decreases significantly
  • Remains the same
  • Increases significantly
  • Where does optimal ventilation/perfusion (V/Q) matching occur in the lungs?

  • Dependent lung zone
  • Middle lung zone
  • Non-dependent lung zone
  • Upper 1/3rd of each lung (correct)
  • What is the effect on the anteroposterior diameter of the abdomen in side-lying position at rest?

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

    Why is there increased work of breathing (WOB) in side-lying position compared to upright?

    <p>Increased resistance and abdominal pressure</p> Signup and view all the answers

    What is the perfusion pattern in the lungs from non-dependent to dependent regions?

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

    What is the effect of side lying position on left ventricular end diastolic pressure?

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

    Which position is most commonly used for unilateral lung pathologies?

    <p>Side lying</p> Signup and view all the answers

    How does ventilation distribution change in prone abdomen free position compared to the typical prone position?

    <p>Greater in dependent zones</p> Signup and view all the answers

    In side lying position, how should pillows be placed to prevent pressure ulcers?

    <p>Under bony prominences</p> Signup and view all the answers

    What beneficial effect does side lying position have on oxygenation?

    <p>Increases oxygenation</p> Signup and view all the answers

    How does the fluid shift from limbs to thorax change when a patient is in the side lying position?

    <p>Remains same as supine</p> Signup and view all the answers

    What is the typical V/Q ratio in zone II of the lungs in the supine position?

    <p>0.8</p> Signup and view all the answers

    What is the effect of supine positioning on the V/Q ratio in the lungs?

    <p>The V/Q ratio decreases from apex to base of the lungs.</p> Signup and view all the answers

    What is the effect of supine positioning on lung compliance?

    <p>Lung compliance decreases due to increased pulmonary blood volume and airway closure.</p> Signup and view all the answers

    What is the effect of supine positioning on the diaphragm?

    <p>The diaphragm is displaced upwards, decreasing FRC.</p> Signup and view all the answers

    What is the effect of supine positioning on airway resistance?

    <p>Airway resistance increases due to reduced FRC.</p> Signup and view all the answers

    What is the primary mechanism for generating tidal volume in the supine position?

    <p>Abdominal displacement</p> Signup and view all the answers

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