Question:

Dr X measures blood pressure of Mr A using oscillotonometer and only records systolic and mean BP.

Systolic BP = 140 mm Hg, mean BP is 100 mm Hg.

What is Mr X's diastolic BP?

Answer:

= (300-140)/2 = 160/2 = 80 mm Hg

Mr X's diastolic BP is 80 mm Hg.