A-A Gradient Calculation
A-A Gradient Calculation . It is still used a lot, but new studies indicate that there may be other methods that work better. In this calculator, patm is estimated by elevation above sea level using this formula: How To Find Gradient / Slope Calculator Find the Slope of a Line from chihoogengo.blogspot.com Pa co 2 (partial pressure of arterial co 2): Assesses for degree of shunting and v/q mismatch. Available for iphone, ipad, android, and web.