It's a great example of education being aimed at the lowest common denominator and like much of healthcare gender based in the extreme.

I would ABSOLUTELY do abdominal thrusts if needed - for all the great reasons shared above.

“If Adam Picked the Apple” by Danielle Coffyn
Love this. Reminds me of “If Men Could Menstruate” by Gloria Steinem

The giveaway is the superimposed frequency is too regular in its waveform morphology both from f and amp perspective.

I haven't bothered to research why this happens but i had assumed it's a lack of EM shielding on very sensitive transducers / electronics?