Why Does A Doctor Take Your Blood Pressure!
The heart inside our body works like a pump sending blood to and fro in the entire body. Just as water rushing through a nose exerts pressure on the nose, blood passing through the vessels in your body exerts pressure on the walls of these. It is important for a doctor to know your blood pressure because it can tell the condition of the heart and the arteries. Their strength and some other important facts regarding your health.
When the left ventricle of the heart contracts, the pumping action occurs. It forces the flood out into the arteries which expand to receive the flow of blood. The muscular lining of the arteries resists this pressure and the blood is squeezed out of them into the smaller vessels of the body. The resultant amount of pressure on the blood is called the blood pressure.
When a doctor has to measure someone’s blood pressure, he attaches a rubber cuff to the arm just above the elbow. This cuff can be pumped and filled with air like a balloon. When the doctor fills this cuff so that it holds the arm tightly and stops the flow of blood through the artery in the arm, then the air is allowed to come out of the cuff. The blood rushes through the artery and the doctor takes the reading with the help of a tube containing mercury.
This first reading is called the “maximum” reading which tells the doctor your blood pressure when the heart is pumping. The second or the “minimum” reading is taken to show the blood pressure when the heart is in resting stage. The blood pressure reading always has two readings called the maximum / minimum blood pressure.
The average blood pressure of a healthy adult is 120/80. But the reading can vary for different persons and also in the same person at different times.