What is an example of hyperemia?

Active hyperemia is a physiological response to something happening in the body. It is an acute form of hyperemia. For example, there is more blood in the digestive system after a meal, more blood in the muscles after exercise, and more blood in the face when a person blushes.

What is hyperemia of the skin?

Clinically, hyperaemia in tissues manifests as erythema (redness of the skin) because of the engorgement of vessels with oxygenated blood. Hyperaemia can also occur due to a fall in atmospheric pressure outside the body. The term is from Greek ὑπέρ (hupér) ‘over’ + αἷμα (haîma) ‘blood’.

What is hyperemia in inflammation?

Hyperemia is an active process that is part of acute inflammation, whereas congestion is the passive process resulting from decreased outflow of venous blood, as occurs in congestive heart failure (Fig. 9-56).

What is pulmonary hyperemia?

pulmonary hyperemia. increased amount of blood flow into the lungs. Synonyms. Exact Synonyms: lung hyperaemia ; lung hyperemia ; pulmonary hyperaemia.

When does hyperemia occur?

There are two types of hyperemia: Active hyperemia happens when there’s an increase in the blood supply to an organ. This is usually in response to a greater demand for blood — for example, if you’re exercising. Passive hyperemia is when blood can’t properly exit an organ, so it builds up in the blood vessels.

What biological active substances can lead to active hyperemia?

Active hyperemia may be due to a combination of tissue hypoxia and the generation of vasodilator metabolites such as potassium ion, carbon dioxide, nitric oxide, and adenosine.

What is hyperemia in the colon?

Aim: Intestinal hyperaemia is a sign of active disease in the inflamed intestine which can be detected by Doppler sonography. This technique, however, can be jeopardized by tissue motion artefacts (peristalsis), and intramural enteric vessel perfusion may be below the detection threshold.