Pulmonary banding is performed in infants with congenital heart defects that make them susceptible to pulmonary hypertension. A band is placed around the pulmonary artery to induce a stenosis and thereby reduce flow and pressure in the pulmonary artery. For the following conditions. (a) Determine Reynolds number. Flow rate: 2000cm³/min Upstream pulmonary artery diameter: 1.3cm Density of blood: 1070kg/m3 Conversion factor: 133.32Pa/mmHg Viscosity of blood: 0.0035 Pa-s
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
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