Wound Management Exam 1 Flashcards
Disinfectants
destroy cells from the outside
-need a necessary time length for the action
Types of wounds
-abrasion
-bruising
-hematoma
-contusion
-puncture wound
-incised wound
-laceration
-complicated wounds
-burns
Abrasion
-scrape
-surface wound (hair and top layer of skin)
-usually do not have to do anything for it (sometimes they get infected)
Hematoma
collections of extravascular blood that sits in an area
-feels soft/squishy
-usually the body reabsorbs it
-sometimes vets drain it, others don’t want to risk infection with a needle
What causes hematoma’s?
blunt force trauma
What is the richest medium for bacteria growth?
blood
Contusion
not a collection of blood but the blood is spread out (bruise)
What causes a contusion?
blunt force trauma that leads to a bruise
Puncture wound
a wound that is deeper than it is wide
-will scab on top before they heal
-sometimes hard to see
-creates an anaerobic environment where some bacteria thrive
What is a bacteria that often thrives in puncture wounds?
tetanus
Incision
a wound that has clear edges
-can be a cut or from a scalpel
-anything that you can stitch
Laceration
a wound that has clear edges but more structures are involved
-must be able to staple/stitch
Complicated wound
-a complicated wound
-lots of structures damaged
-takes awhile to heal
Burn
-very problematic
-even if animal is removed from the heat, the heat continues to sink down and damage can occur for hours after
-kills everything (lots of scars)
3 phases of healing
-inflammatory
-granulation
-contraction and epithelization
Inflammatory stage of healing
-clot provides scaffolding for new matrix and migration of cells
-phagocytic cells will debride wound
-want to sometimes make the wound bleed again to “wake” up this process
Granulation process of healing
-cannot process until blood clots, necrotic tissue, debris, and infection have been eliminated
-angiogenesis for blood supply
-made of loose ECM
When is granulation tissue made?
develops 3-6 days post-injury and continues until epithelization occurs
Epithelialization
growth of new epithelial cells
Angiogenesis
formation of new blood vessels
Contraction and epithelialization step of healing
-very slow but starts within hours of wounding
-cells migrate centripetally
-healing epithelium is fragile and poorly adherent to underlying tissues
-the wound contracts and a scar is formed
When do you usually see contraction lines on a wound?
after a few days
What color is granulation tissue?
yellowish/pink
Where to wounds heal and close the best/quickest?
in heavily vascularized areas (chest, face, etc.)
When does granulation tissue become a problem?
when it becomes exuberant (proud flesh)
What does the layout of the skin need to be for the injury to heal?
inside of the wound needs to be lower than the outside edges
Purposes of granulation tissue:
- provides surface for epithelialization
- is resistant to infection
- is necessary for wound contraction
Factors that delay healing
-location
-infection
-movement
-wound dimensions
-involvement of deep structures
-poor blood/oxygen supply
-foreign bodies
-sequestrum
-nutritional factor
-previous treatment
-age of wound
-economic factor
What occurs to wounds in the winter/cold weather?
the bleeding stops quickly because of vasoconstriction but healing takes much longer