Self-monitoring blood oxygen at home can help | EurekAlert!
Amazon.com: Fingertip Pulse Oximeter Blood Oxygen Saturation Monitor Pulse Ox, Heart Rate and Fast Spo2 Reading Oxygen Meter with OLED Screen Included Lanyard and 2 X AAA Batteries : Health & Household
ADC 2100 DIAGNOSTIX Digital Fingertip Pulse Oximeter - Stethoscope.com
What's a Pulse Oximeter, and Do I Really Need One at Home? - The New York Times