Pulmonary Mechanics in Side Lying Position Quiz

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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?

Decreases Signup and view all the answers

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

Increased resistance and abdominal pressure Signup and view all the answers

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

Increases Signup and view all the answers

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

Increased Signup and view all the answers

Which position is most commonly used for unilateral lung pathologies?

Side lying Signup and view all the answers

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

Greater in dependent zones Signup and view all the answers

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

Under bony prominences Signup and view all the answers

What beneficial effect does side lying position have on oxygenation?

Increases oxygenation 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?

Remains same as supine Signup and view all the answers

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

0.8 Signup and view all the answers

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

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

What is the effect of supine positioning on lung compliance?

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

What is the effect of supine positioning on the diaphragm?

The diaphragm is displaced upwards, decreasing FRC. Signup and view all the answers

What is the effect of supine positioning on airway resistance?

Airway resistance increases due to reduced FRC. Signup and view all the answers

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

Abdominal displacement Signup and view all the answers