The direction of the shelving of
margins of a lacerated wound indicates the direction of the blow applied to
cause the wound as seen in MLC cases.
- Lacerations are tears or splits of skin, mucous
membranes, muscle or internal organs produced by application of blunt
force to a broad area of the body, which crushes or stretches the tissues
beyond the limits of their elasticity.
- Crush injury from a direct blow may produce an
irregular or stellate laceration with a variable degree of devitalized
tissue, abrasion and visible contamination.
- Do not close a laceration if there is visible
contamination, debris, non–viable tissue or signs of infection. Wounds may
involve vascular areas of the face and scalp where the risk of infection
is low or extremities where infection becomes a greater risk, along with
the possibility of tendon and nerve damage. The elderly and patients on
chronic steroid therapy may present with "wet tissue paper" skin
tears following relatively minor trauma.
- When produced by a blunt weapon, such as club, crowbar,
stone, brick etc., a lacerated wound is usually accompanied by a
considerable amount of bruising of the surrounding and underlying tissues,
and has inverted and irregular edges. The direction of the shelving of
margins of a lacerated wound indicates the direction of the blow applied
to cause the wound.
- When a heavy weight such as the wheel of a heavy cart
or a truck passes over an extremity, by its shearing and grinding force,
it tears the skin from the underlying tissue and crushes the muscles and
soft part lying beneath it realizing considerable blood and fat in them.
- Crush injury syndrome or fat emboli may follow a
lacerated wound. The tear, avulsion, split are types of laceration.
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