So blades, I was thinking about the troubles legal states have with operating vehicles while stoned. So an idea i came up with was what if there was a pocket blood meter that could detect the concentration of THC in the blood and a relative time span of use. The design and concept could be similar to that of a blood sugar meter and take test strips like one. The technological part of that would have to be worked out but i thought it was a neat idea. Anybody out there think they could put a prototype together, feel free to use this idea. I think if it was accurate and sensible it'd be a better, more convenient ,method to the current ones.