A Pulse Oximeter is a handy tool to have. Besides  giving a responder an idea of the patients pulse (which should also be verified manually by palpation) the Pulse Oximeter will also give you an idea of the Patients oxygen saturation (aka SpO2) in their blood. Normal ranges for SpO2

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Whoa. I just saw this on Twitter, and had to post it. if your pc isnt lagging, this animation shows heart function working in real time with a resting heart rate of 72bpm. See more (and a slowed down version) here:https://hippano.tumblr.com/post/110367051025/hippano-heres-some-cardio-lecture-crammed-into-a

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