Cardio 3 2
Card Set Information
Cardio 3 2
Cardio 3 2
Loosely woven fibers in gelatinous matrix called ground substance
Blisters occur here if friction
Collagen and reticular fibers
---Important in healing wounds
Connective tissue that provides increased structural support to the skin
Collagen that anchors it to subcutaneous tissue, fascia, muscle, and bone
Supports and nourishes epidermis
Houses epidermal appendages – Hair, Glands, Nails
Layer of loose connective tissue
High proportion of fat cells
Functions of Skin
1 Protection of internal structures
2 Sensory perception (nerve cells inside)
7 Social communication
50% reduction cell turnover rate
20% reduction in dermal thickness
Reduction in dermal vasculature
Redistribution of subcutaneous tissue
Decreased number of Langerhan’s cells
50% decrease in fibroblast and mast cells
Decreased # sweat glands
Decreased absorption through the skin
Decreased ability to synthesize vitamin D
Ramifications for Elderly patients
Pressure and thermal damage
Shears and tears
Hyper and hypothermia
Types of wound healing
Mostly superficial wounds involving the epidermis or wound with clean edges pulled tightly together like a surgical wound.
Heal in 4 – 14 days and result in minimal scarring.
Wound that involves tissue loss - EG, pressure ulcers, burns, surgical dehisced wounds, traumatic injury
Edges can’t be easily approximated. Healing occurs by wound repair.
During healing, wound will fill with granulation tissue, scar forms, and reepithelialization occurs primarily from the wound edges.
Longer to heal, more complications
Wound deliberately left open to allow edema or infection to resolve or permit removal of exudate.
After this period, wound is closed by surgeon
More scarring than primary intention wounds, but less scarring than secondary intention wounds.
***Occurs immediately, 2-5 days in healthy individuals.
vasoconstriction and platelet plug to stop flow of blood
WBC kill bacteria nad damaged tissue
Mast cells produce histamine for inflammation to bring more chemical mediators here
2 days to 3 weeks depending on size
Granulation tissue formation
Collagen synthesis continues at a rapid rate after wound closure.
The wound is strengthened and reorganized to fit the surrounding tissue.
Remodeling continues up to 2 years with the greatest amount of change in the first 6 months to one year.
Wounds usually have only 80% of the skin’s original tensile strength.