Prostaglandins are also activated in the
kidney, but these are intended to reduce blood pressure, counteracting the
effects of renin.
So long story short, how is your son's blood pressure? (avg=120/ 80) Hypertension= 140/90 or above. Does he have chronic conditions causing low oxygenation (diabetes, asthma, live in high altitude, and you say he had blood work, do you know what the oxygen concentration in his blood was (pO2)?