Measuring Oxygen Saturation with Pulse Oximetry
Category: Vital Signs
Status: Stub — content coming soon
Purpose
Describe the clinical use of pulse oximetry for monitoring oxygenation.
Equipment
- Pulse oximeter probe (finger, toe, or ear)
Procedure
Normal Findings
- SpO₂: 95–100%
Abnormal Findings
| SpO₂ | Interpretation |
|---|---|
| 91–94% | Mild hypoxia — monitor closely |
| 86–90% | Moderate hypoxia — notify provider |
| < 86% | Severe hypoxia — immediate intervention |
Limitations & Factors Affecting Accuracy
- Nail polish (especially dark colors)
- Poor peripheral perfusion
- Carbon monoxide poisoning (falsely elevated)
- Anemia
Notes
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