Flashcards in Soft Tissue Trauma Deck (36)
Largest organ of the human body
Injury when energy exchange between the patient and an object is more than the tissues can handle
Soft tissue trauma
Blunt, penetrating and burns
LEADING FORM OF INJURY
Protects underlying tissue. Temp regulation. Prevents water loss. Sensory organ for brain.
Epidermis and Dermis
-Stratum Corneum top layer that constantly sheds. And four living layers beneath that give rise to the top layer
Melanocytes: proportional to the darkness of ones skin
-Tough, highly elastic.
-Made of collagen fibers, elastic fibers and gel. Fibroblasts: secrete collagen, elastin and ground substance, found within Dermis.
Fibrous protein that give high strength to skin and resistance to breakage.
Give elasticity to skin
Gives skin resistance to compression using gel
Papillary Dermis: vasculature, provides nutrients to epidermis and thermoregulation
Reticular Layer: dense, irregular connective tissue, gives strength and elasticity
Marcophages and Lymphocytes
Also found within the dermal layer. Part of inflammatory process and combat microogranisms
-when pathogen enters Dermis, macrophages and lymphocytes destroy the microorganism and signal other cells to migrate to the area.
Physical injury causes them to synthesize special chemical mediators increasing blood flow resulting in redness and warmth
Cells within dermis
Sub Q layer
Blood vessels, hair and nerves
Skin Tension Lines
Tautness of skin varied in different regions of skin
Soft tissues beneath skin surface are damaged but does not break epidermis
Disruption of the skin. Abrasions, lacerations, bites, impaled objects
Crushed between two solid objects
Develop in crush injuries. Anaerobic metabolism occurs because arterial flow and oxygenated blood is cut off from an extremity creating pyruvic acid
The bleeding stops via clotting cascade
White blood cells and others move to injured site to begin repair and kill invading pathogens that have infiltrated exposed area.
Chemotactic chemicals are released and signal repairing cells to migrate to the site of injury.
Granulocytes and Macrophages engulf bacteria through phagocytosis which involves ingesting the bacteria
Mast Cells release histamine. Histamine causes dilation of blood vessels increasing blood flow and causes redness and warmth.
Histamine makes capillaries more permeable causing fluid to leak out and result in swelling.
When new epithelial cells are moved to damaged ones. Bottom four layers of skin produce more epithelial cells.
New blood vessels form as the body attempts to bring oxygen and nutrients to the injured tissue.
Tough, fibrous protein found in scar tissue, hair and bones. Synthesized by fibroblasts that move to damaged area.
High Risk Wound
Human and Animal Bite
-warm and moist mouth invites bacteria and microogranisms
Do not remove unless interfering with airway