Contusion vs. Abrasion - What's the difference?

Wikipedia

  • Contusion

    A contusion, commonly known as a bruise, is a type of hematoma of tissue in which capillaries and sometimes venules are damaged by trauma, allowing blood to seep, hemorrhage, or extravasate into the surrounding interstitial tissues. The bruise then remains visible until the blood is either absorbed by tissues or cleared by immune system action. Bruises, which do not blanch under pressure, can involve capillaries at the level of skin, subcutaneous tissue, muscle, or bone. Bruises are not to be confused with other similar-looking lesions primarily distinguished by their diameter or causation. These lesions include petechia (< 3 mm result from numerous and diverse etiologies such as adverse reactions from medications such as warfarin, straining, asphyxiation, platelet disorders and diseases such as cytomegalovirus), purpura (3 mm to 1 cm, classified as palpable purpura or non-palpable purpura and indicates various pathologic conditions such as thrombocytopenia), and ecchymosis (>1 cm caused by blood dissecting through tissue planes and settled in an area remote from the site of trauma or pathology such as periorbital ecchymosis, e.g.,"raccoon eyes", arising from a basilar skull fracture or from a neuroblastoma). As a type of hematoma, a bruise is always caused by internal bleeding into the interstitial tissues which does not break through the skin, usually initiated by blunt trauma, which causes damage through physical compression and deceleration forces. Trauma sufficient to cause bruising can occur from a wide variety of situations including accidents, falls, and surgeries. Disease states such as insufficient or malfunctioning platelets, other coagulation deficiencies, or vascular disorders, such as venous blockage associated with severe allergies can lead to the formation of purpura which is not to be confused with trauma-related bruising/contusion. If the trauma is sufficient to break the skin and allow blood to escape the interstitial tissues, the injury is not a bruise but instead a different variety of hemorrhage called bleeding. However, such injuries may be accompanied by bruising elsewhere. Bruises often induce pain, but small bruises are not normally dangerous alone. Sometimes bruises can be serious, leading to other more life-threatening forms of hematoma, such as when associated with serious injuries, including fractures and more severe internal bleeding. The likelihood and severity of bruising depends on many factors, including type and healthiness of affected tissues. Minor bruises may be easily recognized in people with light skin color by characteristic blue or purple appearance (idiomatically described as "black and blue") in the days following the injury.

Wiktionary

  • Contusion (noun)

    A wound, such as a bruise, in which the skin is not broken, often having broken blood vessels and discolouration.

  • Contusion (noun)

    The act of bruising.

  • Abrasion (noun)

    The act of abrading, wearing, or rubbing off; the wearing away by friction. First attested in the mid 17th century.page=7

  • Abrasion (noun)

    The substance thus rubbed off; debris. First attested in the mid 18th century.

  • Abrasion (noun)

    The effect of mechanical erosion of rock, especially a river bed, by rock fragments scratching and scraping it. First attested in the mid 19th century.

  • Abrasion (noun)

    An abraded, scraped, or worn area. First attested in the mid 20th century.

  • Abrasion (noun)

    A superficial wound caused by scraping; an area of skin where the cells on the surface have been scraped or worn away. First attested in the mid 20th century.

  • Abrasion (noun)

    The wearing away of the surface of the tooth by chewing.

Oxford Dictionary

  • Contusion (noun)

    a region of injured tissue or skin in which blood capillaries have been ruptured; a bruise

    "vigorously shaking the head back and forth can produce contusions to the soft structure of the brain"

    "a dark contusion on his cheek was beginning to swell"

  • Abrasion (noun)

    the process of scraping or wearing something away

    "the metal is resistant to abrasion"

  • Abrasion (noun)

    an area damaged by scraping or wearing away

    "there were cuts and abrasions to the lips and jaw"

Webster Dictionary

  • Contusion (noun)

    The act or process of beating, bruising, or pounding; the state of being beaten or bruised.

  • Contusion (noun)

    A bruise; an injury attended with more or less disorganization of the subcutaneous tissue and effusion of blood beneath the skin, but without apparent wound.

  • Abrasion (noun)

    The act of abrading, wearing, or rubbing off; the wearing away by friction; as, the abrasion of coins.

  • Abrasion (noun)

    The substance rubbed off.

  • Abrasion (noun)

    A superficial excoriation, with loss of substance under the form of small shreds.

Princeton's WordNet

  • Contusion (noun)

    an injury that doesn't break the skin but results in some discoloration

  • Contusion (noun)

    the action of bruising;

    "the bruise resulted from a contusion"

  • Abrasion (noun)

    an abraded area where the skin is torn or worn off

  • Abrasion (noun)

    erosion by friction

  • Abrasion (noun)

    the wearing down of rock particles by friction due to water or wind or ice

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