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Difference between revisions of "Forensic pathology"
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→Classification of wounds: more refs
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===Overview=== | ===Overview=== | ||
Mnemonic ''CALI'': | Mnemonic ''CALI'': | ||
* | *'''C'''ontusion - "bruise", haematoma. | ||
**Age (usual colour change sequence): red, blue, green, yellow, brown.<ref name=Ref_HospAuto108>{{Ref HospAuto|108}}</ref> | **Age (usual colour change sequence): red, blue, green, yellow, brown.<ref name=Ref_HospAuto108>{{Ref HospAuto|108}}</ref> | ||
* | **Etiology: bleeding from arterioles or venules (not capillaries).<ref name=Ref_HospAuto105>{{Ref HospAuto|105}}</ref> | ||
* | *'''A'''brasion - "scrape", e.g. motorcyclist slide across the roadway... skin scraped-off. | ||
* | **Can be subclassified as ''brush abrasions'' (has skin tags) and ''crush abrasions'' (do not have skin tags). | ||
***Skin tags suggest directionality; they are found at the distal point / point of last contact.<ref name=Ref_HospAuto105>{{Ref HospAuto|105}}</ref> | |||
*'''L'''aceration - "tear", indicates blunt force trauma; contact point may be distant from where skin splits. | |||
*'''I'''ncised - "cut", e.g. caused by a knife.<ref name=Ref_HoFP154>{{Ref_HoFP|154}}</ref> | |||
*#"Cut" or "slash" = length > depth. | *#"Cut" or "slash" = length > depth. | ||
*#"Stab" = depth > length. | *#"Stab" = depth > length. | ||
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**Contusions skin is intact... in abrasion it is not. | **Contusions skin is intact... in abrasion it is not. | ||
**Abrasions and contusions may be co-localized, i.e. in the same place. | **Abrasions and contusions may be co-localized, i.e. in the same place. | ||
*Laceration vs. incision: | *Laceration vs. incision: | ||
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***Bridges are fine strands of tissue that cross the long axis of the skin defect. | ***Bridges are fine strands of tissue that cross the long axis of the skin defect. | ||
****You can think of the wound as partially "sutured" by the bridges of tissue. | ****You can think of the wound as partially "sutured" by the bridges of tissue. | ||
**Lacerations are usually associated with a contusion and/or crush. | **Lacerations are usually associated with a contusion and/or crush and have an irregular margin.<ref name=Ref_HospAuto109>{{Ref HospAuto|109}}</ref> | ||
**Lacerations are classically on the skull and face. They are rarely on the abdomen. | **Lacerations are classically on the skull and face. They are rarely on the abdomen. | ||