Ventilation Ratios and Minute Ventilation Quiz

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What does minute ventilation measure?

Pressure difference between plateau and PEEP

Ratio of tidal volume to respiratory rate

Volume of gas inspired over one minute (correct)

Change in pressure during inspiration

If a patient is 'over-breathing' the ventilator, what adjustment should be made?

Decrease tidal volume

Decrease respiratory rate

Decrease compliance

Increase minute ventilation (correct)

How is compliance calculated in relation to ventilation?

Pressure difference between inspiration and expiration

Difference between plateau pressure and PEEP

Ratio of tidal volume to respiratory rate

Volume divided by pressure change (correct)

In a patient with decreased lung compliance, what is expected of their inspiratory pressure?

It will need to be higher to achieve a certain tidal volume Signup and view all the answers

What adjustment can help a patient with increased PaCO2 from respiratory acidosis?

Increasing minute ventilation Signup and view all the answers

What happens to minute ventilation if tidal volume is increased?

Minute ventilation increases Signup and view all the answers

What is the independent variable in a volume-regulated mode on a ventilator?

Tidal volume Signup and view all the answers

In a pressure-regulated mode on a ventilator, what is the dependent variable?

Tidal volume Signup and view all the answers

For a set of non-compliant, stiff lungs, which mode of ventilation may result in a smaller tidal volume delivery?

Pressure-regulated mode Signup and view all the answers

How does lung compliance affect the inspiratory/plateau pressure needed to deliver a certain tidal volume?

Higher compliance requires lower pressure Signup and view all the answers

Which type of lungs can accept more volume at the same inspiratory pressure?

Compliant lungs Signup and view all the answers

What are typical initial ventilator settings for a newly intubated patient without underlying lung disease based on the text?

$2(PEEP + Tidal Volume)$ Signup and view all the answers

What does PIP stand for in the context of mechanical ventilation?

Peak Inspiratory Pressure Signup and view all the answers

Which parameter helps to distinguish whether changes in airway pressure are due to lung stiffness or a flow-dependent issue?

R (Resistance) Signup and view all the answers

What does Cdyn represent in the context of mechanical ventilation?

Dynamic Compliance Signup and view all the answers

How is I:E ratio described in a person without an underlying lung disease?

1:2, spending twice as long at expiration Signup and view all the answers

Why is Pplat often slightly lower than PIP during mechanical ventilation?

Due to increased airway resistance Signup and view all the answers

How is VT/kg BW measured in mechanical ventilation?

Tidal Volume relative to Body Weight Signup and view all the answers