Dr. Declan Bedford:

I suppose it might be worth a try, but I do not know that there is evidence anywhere to say that system works. It would only be speculation if I may say so. I am sure some individuals might use it, but they might get a false negative or a false low reading and then they would be in greater trouble when they go out, thinking that they were fine. If they had not that reading, the might not have driven at all in the first place.