I don't think this is true or if it is, I don' think it will work accurately detect panic attacks. The panic itself is largely induced by increased carbon dioxide, not oxygen. I've had panic attacks while wearing a pulse ox, and I have not seen a change. A plethysmograph can also detect breathing rate, like in the MightySat, which might give a better clue, but the problem is that there are so many physiological states that could cause increased breathing rate and pulse besides panic that the feature would be useless except to say "something is wrong."
This. Completely agree. Your blood oxygen saturation levels should be normal before you're hyperventilating (normal breathing). They'll still be normal when you're hyperventilating. The only thing that will really change with rapid breathing will be carbon dioxide levels. (The faster you breathe, the more CO2 you blow off, which was some of the logic behind the old school (and no longer recommended) remedy of breathing into a paper bag. If I rebreathe my exhaled CO2 my CO2 level won't drop!).
Monitoring HR/breathing rate might have a hard time distinguishing between a workout vs a panic attack.
I hope if they do put a pulse oximeter in the watch that it's a good one, and that it can detect/gives you the ability to see the pulse ox waveform (like the mightysat) so you know if the reading is accurate. Pulse oximeters, when not getting a clean read/good waveform have a tendency to report erroneously low levels...
I should be quoting others as well, not singling you out. Inserting the medical perspective here:
- Panics are not typically induced by CO2 levels, they are induced by thoughts or sensations. You can’t spontaneous change your blood carbon dioxide and then panic.
- The hyperventilation of a panic attack blows off CO2 and causes levels to
drop, called hypocarbia, not to rise. Among other things this has neurological consequences, such as visual changes, and tingling of the lips and extremities. You can even try it on purpose (in a safe position and space; don’t pass out!). Countering this is what the traditional brown bag is for.
- Panic attacks typically cause hyperventilation and tachycardia. The new Apple Watch may be able to detect both.
- True that other things can cause both. One is pain (let’s assume you’ll know if you have pain) and another is exercise (let’s assume you’ll know if you’re exercising).
- Another thing that can cause both is a heart attack. If the panic alarm triggers, the next step would be to use the AW to check your EKG. It could alert in the case of a STEMI.
- There are still others that can cause both, such as pulmonary embolus and shock. Neither Apple nor anyone else is going to produce a device that is universally accurate. As biometric modalities are added, diagnostic accuracy will improve, and things that an AW can detect will broaden.
- As others have noted, one problem with an Apple Watch detecting panic attacks (or, more accurately, a couple of signs that accompany panic attacks) is the self-fulfilling prophesy of making somebody at risk of panic attacks anxious about having a panic attack.
Hope this cleared up some misunderstandings.