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Message: <blockquote data-quote="Spiker" data-source="post: 812576" data-attributes="member: 102150">You're right to point out there is a big margin of error on the readings, as well as probably lots of variation between individuals and circumstances. All the more reason to set the safety threshold higher. A third factor, that we rarely get to consider (unless wearing a CGM), is whether BG is rising or falling. The girl who was reading 2.2 was probably rising rather than falling. I freak out when I see 2.2 because in that situation it's almost always falling, and falling rapidly. Another possible factor I remember discussing with [USER=12578]@phoenix[/USER] is that a serious hypo is a type of clinical shock, insulin shock as it used to be called. Shock will affect peripheral circulation, shifting circulation to the body core. So a finger prick (capillary) blood test (or CGM) may be much more lagging than usual during or after a bad hypo. It's even possible (pure speculation) that glucose could somehow be preferentially distributed to core organs and away from the peripheral circulation during a bad hypo.</blockquote>

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