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Is Venous bleeding characterized by rapid bleeding of dark red blood?
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What is a severed artery?
Blood squirt (blood spurt, blood spray, blood gush, or blood jet) is the effect when an artery, a blood vessel in the human body (or other organism's body), is cut. Blood pressure causes the blood to bleed out at a rapid, intermittent rate, in a spray, squirt, gush or jet, coinciding with the beating of the heart, rather than the slower, but steady flow of venous bleeding. Also known as arterial bleeding, arterial spurting, or arterial gushing, the amount of blood loss can be copious, occur very rapidly,[1] and can lead to death.
What does cystorrhagia mean?
rapid bleeding from the bladder
Why sickle cell anemia called molecular disease?
Because sickle cell diseases are characterized by the rapid loss of red blood cells
What List of different colors of intravenous fluid?
Orange - Trauma, Rapid blood transfusion, Surgery1 Gray - Rapid fluid replacement, Trauma, Rapid blood transfusion1 Green - Rapid fluid replacement, Trauma, Rapid blood transfusion1
What Revolution characterized rapid change and progress for the expanding middle class?
Indrustrial
What is the purpose of GI bleeding studies?
These studies are designed to find the source of blood loss from the GI tract; that is the stomach, small bowel, or colon. They work best when bleeding is either too slow, intermittent, or too rapid to be identified by other means.
What is the best activity for minimizing venous pooling in the extremities after strenuous cardiovascular activity?
Always do a cool down activity for five to ten minutes after cardiovascular activity. This allows the blood to return to the heart and helps avoid rapid changes in blood pressure. Stretching exercises are usually very beneficial.
What condition is characterized by rapid uncoordinated contractions of cardiac myocytes?
Contraction Band Necrosis
What is a myoclonic seizure?
These are characterized by rapid muscular contractions accompanied with jerks in facial and pelvic muscles.
Terrorist incidents characterized by the rapid onset of medical symptoms and easily observed signatures are?
Chemical
An autoimmune disease that is characterized by weakness and an abnormally rapid fatigue of muscles is gravis?
Myasthenia gravis
What does the venous return depend on?
The veins act as a blood reservoir, because of the ease of distending them. 55-60% of blood is in systemic veins which is important for blood pressure. The volume of blood returned to the right atrium of the heart per minute is called the venous return. Generally venous return is equal to cardiac output, due to the closed system of the circulation, except for minor transient periods. A number of factors affecting the venous return are: Smooth muscle: Due to presence of smooth muscle, the diameter of the veins can be altered by sympathetic discharge(normally vasoconstrictive), adrenaline and angiotensin II (cause venoconstriction). But because the diameters of veins are large, venoconstriction has little effect on peripheral resistance. Elasticity of the heart: If the elasticity decreases, then the ability to fill the heart is reduced. valves: one way valves in the veins (not in large veins) ease blood flow to heart. Muscle pump: When muscles, particularly leg muscles contract, the thin walled veins are squeezed and the blood is forced towards heart, when muscles relax, blood enters the veins, but only from the arterial side. This is an important mechanism for facilitating venous return. Respiratory pump: Breathing in causes negative pressure in thorax causing a suction effect, i.e. the pressure gradient pushing blood towards the right atrium is increased, thus more blood returns to the heart, which means that inspiration leads to an increase in venous return. The opposite occurs with expiration, and venous return is decreased. Gravity: Opposes return of blood from the periphery during sitting or standing. The effect is lost when we lie down. Blood pressure at venous end of capillary: An increased pressure at the venule end of the capillary reduces venous return, because the pressure difference between the right atrium and the peripheral veins is reduced. Similarly a decrease in pressure at the venule end would increase venous return. Right atrial pressure: Is the inflow pressure for the heart. It is a function of the amount of blood returned to the heart and the pumping ability of the heart. Its value at rest is normally close to zero but can also become negative (between -4 to 5 mmHg). Its value is increased by blood volume, a weak heart, rapid increase in venous return. Its value is decreased by lower blood volume and a strong heart. The lower the pressure the greater the venous return (due to suction effect), but there is a limit to the increase in venous return because veins are collapsible.
