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2 Oxygen Saturation and Pulse Oximetry Free Online FlashCards

Study 2 Oxygen Saturation and Pulse Oximetry with 12 free online flashcards. Review key terms, definitions, and concepts with this interactive flashcard deck.

12 cards
01
Front

What does a standard pulse oximeter estimate?

Back

It estimates the percentage of hemoglobin carrying oxygen in pulsating peripheral blood.

02
Front

Does SpO₂ directly measure arterial oxygen saturation?

Back

SpO₂ is an estimate; it does not directly measure arterial oxygen saturation (SaO₂).

03
Front

What respiratory measures are not directly measured by pulse oximetry?

Back

It does not directly measure ventilation or carbon dioxide in the blood.

04
Front

What SpO₂ range is commonly seen in healthy adults at sea level?

Back

For many healthy adults at sea level, SpO₂ is commonly 95%–100%.

05
Front

Why might an individual’s appropriate SpO₂ range differ?

Back

The appropriate range can differ with health conditions, altitude, or a clinician-directed target.

06
Front

How precise is a pulse oximeter reading?

Back

Pulse oximeter readings are estimates, not exact measurements.

07
Front

What factors can interfere with pulse oximeter readings?

Back

Cold skin, poor circulation, movement, nail products, and skin pigmentation can affect readings.

08
Front

Why can SpO₂ be misleading in carbon monoxide exposure?

Back

Carbon monoxide exposure can produce a falsely reassuring SpO₂ reading.

09
Front

What should be considered alongside an SpO₂ reading?

Back

Interpret it alongside symptoms, respiratory assessment, circulation, and the person’s usual range.

10
Front

What tests may help when SpO₂ conflicts with the clinical picture?

Back

An arterial blood gas and co-oximetry may be needed to confirm results that conflict with the clinical picture.

11
Front

What should you do first if a low SpO₂ reading seems unexpected?

Back

Assess the person, check sensor placement and signal quality, then repeat at a suitable site.

12
Front

Why take a falling SpO₂ trend seriously when breathlessness worsens?

Back

A falling SpO₂ trend together with worsening breathlessness is concerning and calls for prompt reassessment.