Can you answer this plz?

Question

A patient needing a blood transfusion has a blood pressure of 120/70 (this is in units of mm

Hg). It is best for the blood during the transfusion, to have a pressure that matches the patient’s

diastolic pressure (70 mm Hg). At what height, above the insertion point, should the blood

supply be raised, such that it has the desired pressure of 70 mmHg is reached?

Answer 1

The equation for hydrostatic pressure is P(z) = P₀ + ρgz where z is the depth of the liquid and P₀ is at the top of the liquid (P_atm) You need to convert mmHg to Pascals: 1.013 x 10⁵ Pa/760 mm Hg.

P_atm + ρgz = P_atm + P_Diastolic or z = P_Diastolic /(ρg) 9 = 9.80 m/s² and ρ= 1000 kg/m³ and P is in Pascals. The answer for z (which is also how high the top of the IV needs to be) will be in meters.