Due to the pumping of the heart and the resistance of the blood vessels, the blood pressure decreases while the circulating blood was moving away of the heart all the way through the arteries. It decreases greatly with the smaller arteries and the arterioles, continuing to decrease while the blood was moving throughout the capillaries back to heart all the way through the veins.
The BP is referred to the pressure being measured from a person through the upper arm. It is commonly measured from the brachial artery that is the major blood vessel which is carrying blood away of the heart. The BP is commonly articulated by the systolic and diastolic pressures like 110/70.
The arterial pressure is usually measured trough a sphygmomanometer that in history uses the height of the mercury reflecting to the circulating pressures. These days, blood pressure assessments are still detailed in mercury millimeters (mmHg) even though the aneroid and electronic meters co not uses mercury.
BP varies among systolic and diastolic pressure for every beat of the heart. Systolic is at the peak pressure of the arteries that happens during the near end of a cardiac cycle in which the ventricles are in contraction.
The diastolic pressure characterizes the minimum pressures on the arteries that happen in the beginning of the cardiac cycle in which the ventricles were full of blood. The average normal blood pressure of healthy adult is 120/80mmHg that spoken as one-twenty over eighty.
Hypertension is the term used if the arterial pressure is abnormally high and the hypotension refers to the pressure that is abnormally low. BP side by side with respiratory rate, body temperature, and pulse rate assessments are the major measurements in the physiological parameters.
Arterial pressure measurements were non-invasive; it was measured without the skin or arterial penetration. The pressure measure invasively is through the penetration of the arterial walls in able to take a measurement. This method is less common and it is usually done at the hospital settings.
Blood Pressure Classifications to Adults
Hypotension – it refers to a blood pressure that ranges from less done 90 in systolic and less done 60 in diastolic.
Normal – blood pressure levels which ranges from 90 to 119 systolic and 60 to 79 diastolic.
Prehypertension – refers to the BP which are ranging from 120 to 139 in systolic and 80 to 89 in diastolic.
Stage 1 Hypertension – blood pressure ranges from 140 to 159 in systolic and 90 to 99 in diastolic.
Stage 2 Hypertension – is a BP that ranges from 160 and above in systolic or 100 and above in diastolic.
There are several factors that could influence the variations and the average BP of an individual. Factors concerning the age along with the gender can influence the average values. For children, normal ranges were lower compared to the adults and the height also varies.
Once the adult ages, systolic pressures will tend to rise and the diastolic pressures tends to fall down. While in the elderly, the blood pressure tends to rise at the above normal range of an adult, mainly because of the reducing flexibility with the arteries.