Pressure is defined as the force acting normally per
unit area of a surface. It is measured in Pascal or mmHg (millimetre of
mercury) Therefore blood pressure is the force which blood exerts on the walls
of the vessels. We can say; that the pressure in a vessel is 100mmHg; means
that the force exerted is sufficient to push a column or mercury against
gravity up to a level of 100mm high. Occasionally, pressure is measured in
centimetre of water (cm H2O). A pressure of 10cm H2O
means a pressure sufficient to raise a column of water against gravity to a
height of 10cm. 1mmHg is therefore equal to 1.36cm H2O the specific gravity of
measuring is 13.6 times that of water and 1 centimetre is 10 times as great as
1 millimetre. When the left ventricle contracts and pushes blood into the
already full aorta and this pressure is about 120mmHg or 16Kpa. The pressure
produced with the arterial system called the systolic blood pressure. At complete diastole, the pressure within
the artery reduces to about 80mmHg or 11pka and this pressure is called the diastole blood pressure.
unit area of a surface. It is measured in Pascal or mmHg (millimetre of
mercury) Therefore blood pressure is the force which blood exerts on the walls
of the vessels. We can say; that the pressure in a vessel is 100mmHg; means
that the force exerted is sufficient to push a column or mercury against
gravity up to a level of 100mm high. Occasionally, pressure is measured in
centimetre of water (cm H2O). A pressure of 10cm H2O
means a pressure sufficient to raise a column of water against gravity to a
height of 10cm. 1mmHg is therefore equal to 1.36cm H2O the specific gravity of
measuring is 13.6 times that of water and 1 centimetre is 10 times as great as
1 millimetre. When the left ventricle contracts and pushes blood into the
already full aorta and this pressure is about 120mmHg or 16Kpa. The pressure
produced with the arterial system called the systolic blood pressure. At complete diastole, the pressure within
the artery reduces to about 80mmHg or 11pka and this pressure is called the diastole blood pressure.
Therefore
blood pressure is systole pressure over diastole pressure:
blood pressure is systole pressure over diastole pressure:
Bp = systolic
pressure
pressure
diastolic pressure
But the human arterial
pressure is measured using sphygmomanometer. The normal systolic pressure
ranges between 90-130mmHg while the diastolic pressure between 50-90mmHg.
pressure is measured using sphygmomanometer. The normal systolic pressure
ranges between 90-130mmHg while the diastolic pressure between 50-90mmHg.