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Why scalp wounds bleed profusely –
explain anatomically?
Deep lacerations to the scalp tend to bleed
profusely for several reasons.
These are:
1.
Rich Blood Supply and Adherent Blood Vessel
Walls: The scalp has a large
number of arteries, veins, and capillaries that provide blood to the tissues.
Compared to blood vessels in other parts of the body, these blood vessels in
the scalp are less mobile because they are embedded in the fibrous connective
tissue. A scalp wound prevents the arteries from properly retracting or
constricting, which results in prolonged bleeding.
2.
Occipitofrontalis Muscle: The muscle covering the top of the skull is
called the occipitofrontalis muscle, or epicranial aponeurosis. It is a thin,
broad muscle. It is divided into the frontal belly and the occipital belly,
which are joined by a central tendon. This muscle is in charge of making the
forehead wrinkled and lifting the eyebrows. Because of its adherence to the
scalp's epidermis, it may impede a wound's natural healing process, thereby
intensifying bleeding.
3.
Anastomoses: Numerous arterial anastomoses, or connections between arteries
that permit blood to flow from one vessel to another, are characteristics of
the scalp's blood supply. In the event of a compromised vascular, these
anastomoses offer alternative pathways for blood flow. Under normal
circumstances, this redundancy helps with tissue perfusion; nevertheless, when
a scalp injury occurs, it also leads to excessive bleeding.
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