So I’ve mentioned this a few times on here, but due to the excitement of the junior in rapids on seeing it (he took a pic to show he’s friends) I thought I’d post an image!
I (like most) struggle to do maths/work out zones when my asthmas really bad. Simple solution - get 3 (or 4) sharpie pens and colour in your zones! It doesn’t affect PFM score, and you can personalise it to your best PF (not predicted). Green for green zone (70/80%+ depending on your asthma plan), yellow/amber for yellow zone (50/60% - 70/80% depending on plan) and red for red zone (50/60% or lower). I also use a black zone for under 30%. In times of trouble (or when in hosp with medics who don’t know your best score) it’s easy for everyone - blow and check the colour!!!