iPhone Oxygen Scan

摘要

This pulse oximeter that connects to an iPhone or iPad can precisely detect bloodrnoxygen levels, which is vital information for pilots who fly unpressurized aircraft and hikers who climb to high elevations. When the user puts a finger into the oximeter, it shines both infrared and red light into the digit; blood absorbs different amounts of each frequency depending on how much oxygen isrncarried by red blood cells.