Hey guys, I'm now in my second month of EMT-B cert and have been reading this forum. Very helpful, and I figured I would throw a question out there for anyone that knows the answer. We just got done covering suctioning in my class and I came across something that was bothering me. We were taught to never suction higher than 200(mmHg??) But if thats the case, how come the suction devices go well above and beyond 200?