What Exactly is a Pulse Oximeter?
A pulse oximeter is a painless, completely non-invasive medical device that clips onto your fingertip. Using advanced sensors, it shines a specialized light through your skin to instantly measure the percentage of oxygen currently bound to your red blood cells (this is your SpO2 level) alongside your resting heart rate.
How to Take an Accurate Medical Reading
False readings can cause unnecessary panic. Follow these steps for an accurate measurement:
- Ensure your hands are warm. Cold fingers restrict capillary blood flow, leading to artificially low readings.
- Remove dark nail polish or artificial acrylic nails, as they can physically block the light sensor from working.
- Rest your hand completely flat on a table, keep it below heart level, and remain perfectly still for at least 30 seconds before trusting the number on the screen.
Understanding the Critical Numbers
- 95% to 100%: These are normal, healthy oxygen levels for most people.
- 90% to 94%: This is considered below normal. You should consult your physician, who may prescribe supplemental home oxygen therapy.
- Below 90%: This is a clinical emergency known as hypoxemia. You must seek immediate medical attention or head to an emergency room.
Always keep a reliable, calibrated pulse oximeter handy when administering home oxygen therapy. We can provide high-quality oximeters along with your oxygen concentrator rental.