3 Oxygenation Strategies Free Online FlashCards

What can supplemental oxygen not correct by itself?

Supplemental oxygen treats low blood oxygen, but does not by itself correct inadequate ventilation, airway obstruction, or the cause of respiratory failure.

When is a nasal cannula commonly used, and at what flow?

A nasal cannula is commonly used for mild hypoxemia at about $1\text{–}6\ \mathrm{L/min}$; its delivered oxygen concentration varies with the patient's breathing.

What minimum flow helps reduce rebreathing with a simple face mask?

Use a simple face mask at a flow of at least $5\ \mathrm{L/min}$ to reduce rebreathing of exhaled gas.

What is the key advantage of a Venturi mask?

A Venturi mask delivers a more controlled oxygen concentration, making it useful when precise titration is important.

What must be maintained when using a reservoir mask?

A reservoir mask provides high-concentration oxygen in urgent or severe hypoxemia; use enough flow to keep its reservoir inflated during inspiration.

What important risk requires close monitoring during high-flow nasal oxygen?

High-flow nasal oxygen can support acute hypoxemic respiratory failure; monitor closely for treatment failure.

When may noninvasive ventilation be unsuitable?

NIV supplies positive pressure and can assist oxygenation and ventilation, but may be unsuitable if a patient cannot protect the airway or tolerate the mask.

What determines effective bag-mask ventilation?

Bag-mask ventilation is used for apnea or inadequate breathing. Effective ventilation depends on airway positioning, a good mask seal, and appropriate technique.

What is a common oxygen saturation target for most acutely ill adults?

A common target for most acutely ill adults is an oxygen saturation of $94\text{–}98\%$.

What initial oxygen saturation target is common for adults at risk of hypercapnic respiratory failure?

For adults with COPD or other recognized risk factors for hypercapnic respiratory failure, a common initial target is $88\text{–}92\%$, pending assessment and individualized review.

What does a normal pulse-oximetry reading not establish?

A normal pulse-oximetry reading does not establish that ventilation is adequate or that carbon dioxide is normal.

What is the purpose of preoxygenation before intubation?

Preoxygenation increases the oxygen available in the lungs before planned apnea, helping delay desaturation during intubation.