Pulse oximeters are small, non-invasive devices that measure the oxygen saturation (SpO₂) in your blood—a key metric for people living with COPD. Using one at home can help you track your condition and detect changes early. Here's how to use it correctly.
If you're still shopping for a device, check out our in-depth guide to the best pulse oximeters for people with COPD.
What You'll Need
- A pulse oximeter (finger-type is most common)
- Clean, warm hands
- A quiet environment to sit and rest for a few minutes
Step-by-Step Instructions
-
Sit Still and Relax
Rest for 5 minutes before taking a reading. Your oxygen level can fluctuate after physical activity. -
Warm Up Your Hands
Cold fingers can lead to inaccurate readings. Rub your hands or soak them in warm water if necessary. -
Position the Device Properly
Place the oximeter on your index or middle finger. Make sure your hand is resting flat with your palm facing down. -
Wait for the Reading to Stabilize
Most pulse oximeters take 5–10 seconds to generate a result. Wait until the number stops changing. -
Record the Result
Write down or log your oxygen saturation (SpO₂) and pulse rate. Note the date, time, and any symptoms.
Tips for Accuracy
- Don’t move or talk during measurement
- Avoid nail polish or artificial nails on the measured finger
- Keep the device charged and clean
For models with advanced tracking features, like the Wellue O2Ring or Masimo MightySat, see our comparison article for help on choosing the right option for your lifestyle.
Understanding the Readings
- Normal SpO₂: 95–100%
- Mild Desaturation: 91–94% (talk to your provider)
- Serious Concern: 90% or below (seek medical help)
Everyone’s baseline may vary, especially with COPD—so work with your provider to set personal thresholds.
When to Use a Pulse Oximeter
- After using a bronchodilator
- During flare-ups or illness
- Before and after physical activity
- Routinely if your provider recommends it
When to Call Your Doctor
Contact your healthcare team if:
- SpO₂ readings drop below your baseline
- You experience shortness of breath, confusion, or chest pain
- Symptoms worsen suddenly
Final Thoughts
A pulse oximeter is a powerful tool to help manage your COPD at home—but it’s not a substitute for clinical care. Used consistently and correctly, it can provide valuable insight into your health and support informed treatment decisions.
Before buying a device, don’t miss our Best Pulse Oximeters for People with COPD in 2025 to find one that fits your needs and budget.
Last updated: June 2025
