Originally Posted by Hajo Flettner
In order for such a comparison to be meaningful you'd need to pass all the smoke generated during a session of smoking a narghile across the the tissue. Practically speaking that is really hard to do.
This is true but one must remember that with cigarettes, you hit more often but smaller drags. When smoking the hookah, the time gap between drags across the entire session is much longer.
His test of sucking with a vacuum non stop for a period of time would skew the results. I would think it would also lead to burnt shisha and a hotter smoke.