Pulse Oximetry and Oxygen Saturation

Meris reviews how to assess oxygen saturation, expected findings, and nursing considerations. The video covers SpO2, probe placement, factors affecting readings, and the impact of racial bias. It emphasizes the importance of clinical judgment, especially in cases like carbon monoxide poisoning. The video also discusses diagnosing hypoxemia and considerations for COPD patients, concluding with quiz questions.

What is the primary purpose of assessing a patient's oxygen saturation?

• To assess hemoglobin saturation with oxygen

• To determine heart rate

• To evaluate lung capacity

• To measure blood pressure

What is the expected SpO2 range for a healthy individual?

• 85-90%

• 90-95%

• 100-105%

• 95-100%

Which of the following is NOT a common site for placing a pulse oximeter probe?

• Earlobe

• Forehead

• Finger

• Toe

Which factor can interfere with the accuracy of a pulse oximeter reading?

• Regular breathing

• Normal skin temperature

• High blood pressure

• Nail polish

Why might pulse oximetry readings be less accurate in patients with darker skin tones?

• Due to faster blood circulation

• Due to higher hemoglobin levels

• Because of increased melanin affecting light absorption

• Because of lower oxygen levels

How is hypoxemia definitively diagnosed?

• By measuring heart rate

• Through a blood pressure test

• Using a pulse oximeter

• With an arterial blood gas (ABG) test

What is the expected oxygen saturation level for a patient with COPD?

• 96-98%

• 93-95%

• 90-92%

• 85-89%

Why is it important not to overcorrect oxygen levels in COPD patients?

• It may lead to increased heart rate

• It might cause dizziness

• It can cause high blood pressure

• It can suppress their hypoxic drive to breathe

What should a nurse do if a pulse oximeter shows 98% but the patient shows signs of distress?

• Increase the oxygen supply

• Ignore the patient's symptoms

• Reassess the patient and consider clinical signs

• Trust the machine's reading

In cases of carbon monoxide poisoning, why might a pulse oximeter show a misleadingly high reading?

• Carbon monoxide increases blood flow

• Carbon monoxide binds to hemoglobin, mimicking oxygen saturation

• The pulse oximeter is faulty

• Carbon monoxide decreases heart rate