Oxiline Pulse 7 Pro Price: $$ Type of oximeter: finger What it measures: oxygen saturation (SpO2), perfusion index (PI), heartbeats per minute (BPM) Other features: includes batteries, has LED screen ...

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The median nerve is a sensory nerve for your thumb, index finger, middle finger, and half of your ring finger. Carpal tunnel syndrome causes numbness, tingling, and pain in those areas.