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Tags: Perfusion Rate Calculator


PERFUSION

In physiology , perfusion (from the Latin " perfundere ", to pour over, to
sprinkle) or tissue perfusion is the process that supplies an organ with the
nutrients and oxygen necessary for its metabolism , its healthy biochemical
activity within the organism.

In an animal equipped with a blood system , this supply is carried out by the
blood which circulates from the arteries towards the capillary vessels which
irrigate the biological tissues . Perfusion can then be measured by the flow of
blood that irrigates the organ in question.

After Perfusion Rate , an organ can be placed under artificial perfusion so as
to keep it alive , for example while waiting to be transplanted .

Acceptances
In extenso , in the context of medical treatment , the term infusion can also
refer as a whole to a drip system allowing the parenteral administration of
drugs by infusion . When this system is connected to a peripheral or deep venous
line (central venous line ), it is called an intravenous infusion . It can also
also be a subcutaneous device, this is called the technique of hypodermoclysis ,
or more simply, subcutaneous infusion .
Hypo- and hyper-perfusion
We speak of hypoperfusion when the level of perfusion of an organ is below a
reference value, for example below the need necessary for the proper functioning
of the organ. Similarly, hyperperfusion refers to stronger than normal
perfusion.

These alterations in perfusion may be the consequence of circulatory
abnormalities. For example, hypoperfusion can result from ischemia or a drop in
blood pressure which, when affecting the brain , can lead to syncope .
Hypoperfusion can also be the cause of pathological situations: fetal renal
hypoperfusion, for example, which can be due to the taking of NSAIDs by the
pregnant woman, causes oligohydramnios , harmful for the correct development of
the fetus.

But hyperperfusion does not necessarily reflect a pathological mechanism . For
example, in the brain , when a brain area is recruited to perform an operation
(such as when the auditory cortex is activated when a sound is heard ), cerebral
blood flow temporarily increases in that region; this is the hemodynamic
response . The measurement of this local hyperperfusion is the basis of various
cerebral imaging techniques .

Created at 2023-01-09 06:07
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