nursing.
Arterial blood pressure is the pressure forces blood to the blood vessel walls that contain it. Fox pressure-dependent change of heart cycle. At the time of ventricular contraction, blood enters the aorta, the pressure increases the maximum pressure is called systole, and during cardiac relaxation pressure will drop, the lowest value is called diastolic pressure.
Systolic blood pressure generated by the strength of heart muscle that drives the contents of the ventricle into the artery that has been stretched.
During the diastolic arterial pressure was still mengembung peripheral arterioles of the arterioles, which block all blood flow kejaringan.
Thus blood pressure is the end result of the strength of heart muscle and blood volume pumped by the ventricle and the contraction of smooth muscle in the walls of arterioles. Contraction of smooth muscle in the arterioles is regulated and controlled by vasoconstrictor nerve center in the medulla oblongata vasomotorik.
Systolic blood pressure may be influenced by physical movement, emotional and other-lai thing, so that should be measured blood pressure at rest time / quiet. (Basal blood pressure).
Factors that affect blood pressure, among others:
1. Strength of the heart pump
2. Blood volume
3. Blood viscosity (blood viscosity)
4. Elasticity of blood vessel walls.
5. Peripheral prisoners.
Unit standards for blood pressure is almost always measured in milli-meter of mercury, because mercury manometer has been used as refrensi standard for measuring blood pressure in the entire history of physiology. Blood pressure means the force actually used by each unit of blood to the area of the vessel wall.
When people say that the pressure in a vessel is 50 mm Hg, this means that the energy used would be enough to push a column of mercury 50 millimeters upward.
Because of the beating heart of a pump, arterial blood enters a disjointed, resulting in arterial pulse pressure in the system. In normal young adults, the pressure at the top of a pulse of approximately systolic pressure 120 mm Hg and diastolic pressure at its lowest point approximately 80 mm Hg. The difference between the both is approximately 40 mm Hg is called pulse pressure.
Blood flow velocity
Blood flow velocity depends on the size of troughs (diamrter) exist in blood vessels or blood vessel group. Fast-moving blood in the aorta, arteries in the velocity decreases and becomes very slow in the capillaries. In the troughs of capillary blood flow or capillary column in small vessels and very much. Sectional area the actual area from which flowed the small vessels is approximately 600 times greater than the aortic area. Widening of the area through which the same amount of blood flow causes significant flow deceleration. Here is a very slow flow within this happens gas exchange, absorption of food substances and materials are not used anymore between red blood cells and plasma in capillaries with fluid and cells in body tissues.
After the blood collected by venous flow velocity increases again and the blood that flows through the lumen (cast) the superior and inferior vena cava at the same time is as fast as the current in the aorta. To maintain circulation, the blood reaches the heart must have the same volume of blood away from the heart.
In venous pressure is low and other factors that help blood flow back to the heart, among others:
-Movement that secrete skeletal muscle above venous pressure.
-respiratory movement generated, particularly by increasing tunrun who works as a pump diaphragm.
-Work sucks yantg issued by the empty atrium during diastole draw blood from the veins to fill.
-The arterial blood pressure even though most have been reduced by the arterioles and capillaries, but still enough to push the blood forward.
by: nursing
Print this pageArterial blood pressure is the pressure forces blood to the blood vessel walls that contain it. Fox pressure-dependent change of heart cycle. At the time of ventricular contraction, blood enters the aorta, the pressure increases the maximum pressure is called systole, and during cardiac relaxation pressure will drop, the lowest value is called diastolic pressure.
Systolic blood pressure generated by the strength of heart muscle that drives the contents of the ventricle into the artery that has been stretched.
During the diastolic arterial pressure was still mengembung peripheral arterioles of the arterioles, which block all blood flow kejaringan.
Thus blood pressure is the end result of the strength of heart muscle and blood volume pumped by the ventricle and the contraction of smooth muscle in the walls of arterioles. Contraction of smooth muscle in the arterioles is regulated and controlled by vasoconstrictor nerve center in the medulla oblongata vasomotorik.
Systolic blood pressure may be influenced by physical movement, emotional and other-lai thing, so that should be measured blood pressure at rest time / quiet. (Basal blood pressure).
Factors that affect blood pressure, among others:
1. Strength of the heart pump
2. Blood volume
3. Blood viscosity (blood viscosity)
4. Elasticity of blood vessel walls.
5. Peripheral prisoners.
Unit standards for blood pressure is almost always measured in milli-meter of mercury, because mercury manometer has been used as refrensi standard for measuring blood pressure in the entire history of physiology. Blood pressure means the force actually used by each unit of blood to the area of the vessel wall.
When people say that the pressure in a vessel is 50 mm Hg, this means that the energy used would be enough to push a column of mercury 50 millimeters upward.
Because of the beating heart of a pump, arterial blood enters a disjointed, resulting in arterial pulse pressure in the system. In normal young adults, the pressure at the top of a pulse of approximately systolic pressure 120 mm Hg and diastolic pressure at its lowest point approximately 80 mm Hg. The difference between the both is approximately 40 mm Hg is called pulse pressure.
Blood flow velocity
Blood flow velocity depends on the size of troughs (diamrter) exist in blood vessels or blood vessel group. Fast-moving blood in the aorta, arteries in the velocity decreases and becomes very slow in the capillaries. In the troughs of capillary blood flow or capillary column in small vessels and very much. Sectional area the actual area from which flowed the small vessels is approximately 600 times greater than the aortic area. Widening of the area through which the same amount of blood flow causes significant flow deceleration. Here is a very slow flow within this happens gas exchange, absorption of food substances and materials are not used anymore between red blood cells and plasma in capillaries with fluid and cells in body tissues.
After the blood collected by venous flow velocity increases again and the blood that flows through the lumen (cast) the superior and inferior vena cava at the same time is as fast as the current in the aorta. To maintain circulation, the blood reaches the heart must have the same volume of blood away from the heart.
In venous pressure is low and other factors that help blood flow back to the heart, among others:
-Movement that secrete skeletal muscle above venous pressure.
-respiratory movement generated, particularly by increasing tunrun who works as a pump diaphragm.
-Work sucks yantg issued by the empty atrium during diastole draw blood from the veins to fill.
-The arterial blood pressure even though most have been reduced by the arterioles and capillaries, but still enough to push the blood forward.
by: nursing