1.) What should you start the pressure at? and what should you build it up to? what do u want to achieve by building pressure up?
2.) Are the + & - pressures set at the same level?
3.) What is the timing for the positive-negative?
1. start pressures low, about 10-20 cm as tolerated, then build up to 40-45 cm to get deep insufflation
2. they are set at about the same, though some ppl like the insp. pressure to be slightly less
3. timing for the + to - is about 1-2 seconds