What is venous distensibility?

Venous distensibility was defined as the changes in the forearm volume when transmural venous pressure was increased from 0 to 30 mm Hg. Measurements of venous distensibility were repeated three times by the same examiner (K.S.), and the intraobserver coefficient of variation was 63%.

What is distensibility vs compliance?

Distensibility is related to elastic properties of the arterial wall, and compliance reflects the buffering function of the artery. Distensibility is a determinant of stress on the vessel wall.

Do arteries and veins have the same distensibility?

Difference in Distensibility of the Arteries and the Veins Anatomically, the walls of the arteries are far stronger than those of the veins. Consequently, the veins, on average, are about eight times more distensible than the arteries.

What type of blood vessel is under the most pressure?

arteries
Important: The highest pressure of circulating blood is found in arteries, and gradu- ally drops as the blood flows through the arterioles, capillaries, venules, and veins (where it is the lowest).

Which blood vessels have the greatest compliance?

Veins have a much higher compliance than arteries (largely due to their thinner walls.)

Which blood vessels experience the sharpest decrease in blood pressure?

Which blood vessels experience the sharpest decrease in blood pressure? skeletal muscle pumps. You just studied 67 terms!

Why are veins more compliant?

The greater compliance of veins is largely the result of vein collapse that occurs at pressures less than 10 mmHg. Contraction of smooth muscle in arteries reduces their compliance, thereby decreasing arterial blood volume and increasing arterial blood pressure within the arterial system.

Do veins carry blood to the heart?

There are three main types of blood vessels The arteries (red) carry oxygen and nutrients away from your heart, to your body’s tissues. The veins (blue) take oxygen-poor blood back to the heart.

How to calculate distensibility of arteries and veins?

Vascular Distensibility: Calculation ΔVol Vorig x ΔP Or increase in volume/original volume X increase in pressure Distensibility of systemic veins versus arteries Systemic veins are about 8 times more distensibile than systemic arteries. Vascular Compliance

Which is a function of vascular distensibility and compliance?

Vascular Distensibility and Compliance Vascular Distensibility: The ability of a blood vessel wall to expand and contract passively with changes in pressure. All blood vessels are distensible Allows for non pulsatile flow at the capillaries Reservoir function of Veins: can expand to store 0.5 to 1.0 L of extra blood Distensibility

How does Myogenic Theory relate to vascular distensibility?

Myogenic Theory: When vascular smooth muscle responds directly to a passive stretch by increased tone, which increases blood flow. Both work together to determine the final autoregulatory response for a given tissue Chapter 15 – Vascular Distensibility and Functions of the Arterial and Venous Systems Vascular Distensibility and Compliance

What are the distensibilities of the pulmonary vein?

In the pulmonary circulation, the pulmonary vein distensibilities are similar to those of the systemic circulation. But, the pulmonary arteries normally operate under pressures about one sixth of those in the systemic arterial system, and their distensibilities are correspondingly greater, about six times the dis-tensibility of systemic arteries.