I can't seem to get this graph right for an oxyhemoglobin dissociation curve. It's supposed to be sigmoidal, right? Mine comes out linear with insane partial Pressure (PO2) values The equation I get for calculating partial pressure from oxygen saturation is PO2 = (O2 saturation/100)*(atmospheric pressure mmhg - vapour mmhg)
I have the oxygen saturation values, and we're supposed to have two curves. One for 10% CO2 and one for 5% CO2 composition.
One of the saturation values is 38%. Atmospheric = 743, vapour = 22.4 PO2 = (38/100)*(743-22.4) = 273.8 All the curves I see never go above 100 PO2.