B3 L41/42: Management of Burn Injuries Flashcards
What is the function of the epidermis?
Superficial protective layer
Are there blood vessels in the epidermis?
No
What are the 3 things in the epidermis? How do they relate to the function of the epidermis?
- Keratin which toughens and waterproofs
- Melanin (melanocytes) for UV protection
- Rete pegs (undulation) for attachment/adherence to dermis
How many layers are in the dermis?
2
What are the 2 layers of the dermis?
Papillary layer
Reticular layer
What is found in the dermis?
Collagenous network of blood and lymph vessels, nerves, elastin fibres and collage
What is the function of the dermis?
Provides mechanical strength of the skin
What are 3 epidermal appendages? What are they all surround by? What is the function of the epidermal appendages?
• Hair follicles, sweat glands, sebaceous glands
• All are surrounded by epidermal cells & a rich network of capillaries
Centre for regeneration of the epidermis
If _______ intact, then epidermis will heal. If no _______, then healing by secondary intention.
hair follicles; hair follicles
The ______ of dermis and epidermis varies throughout the body. Where is the thinnest and thickest skin found?
thickness
* Thinnest skin – eyelids (0.05mm epidermis and 0.3mm dermis) * Thickest skin – palms and soles (1.5mm epideris) and back (3mm dermis)
What does the Fitzpatrick Skin Type Scale measure? What does it indicate? Which skin types have the worst healing ability?
measures skin’s tolerance to sunlight and tendency to tan or burn.
• Indicates the ability to heal burns. Also depends on genetics.
• Type I & VI have the worst healing ability.
What are 2 features of type I skin?
• Pale white; blond or red hair; blue eyes; freckles;
Always burns, never tans
What are 2 features of type II skin?
• White; fair; blond or red hair; blue, green, or hazel eyes;
Usually burns, tans minimally
What are 2 features of type III skin?
• Cream white; fair with any hair or eye colour; quite common;
Sometimes mild burn, tans uniformly
What are 2 features of type IV skin?
• Moderate brown; typical Mediterranean olive skin tone;
Rarely burns, always tans well
What are 2 features of type V skin?
- Dark brown; Middle Eastern skin types;
* Very rarely burns, tans very easily
What are 2 features of type VI skin?
- Deeply pigmented dark brown to black;
* Never burns, tans very easily
What are 2 features of glabrous skin? Give examples of body parts with this skin?
• Thick epidermis
• No hair
e.g. Palms, soles, lips, genitals
What are 2 features of hairy skin? Give examples of body parts with this skin?
• Thin epidermis
Yes hair follicles
What are the 5 functions of skin?
Interprets sensory input and protects from environment
Prevents excessive water loss
Regulates temperature control
• Allows heat dissipation via conduction, convection and radiation (via papillary plexus)
• Regulation of Sweat glands to control temperature
Provides defence against infection
Maintains moist environment for internal organs
What are 5 implications for the body from skin loss?
Impaired skin sensation - hypersensitivity
Increased evaporation of water from skin
- Increased energy requirements
- metabolic disturbances
- Implications for fluid balance
- Impaired temperature control
Access point for infection
Loss of moist environment for muscles, tendons and nerves - damage, ruptures.
What are the 4 types of burns?
Flame
Scald
Chemical
Electrical
Which type of burn is most common in adults?
Flame
Which type of burn is most common in children and the elderly?
Scald
Which type of burn is most common in the workplace?
Flame
Chemical
Electrical
What is the complication with an electrical/chemical burn?
damage to deeper structures (e.g. muscles, nerves)
What are the 4 depths of burns?
Superficial burn
Superficial partial thickness burn
Deep partial thickness burn
Full thickness burn
What area(s) is destroyed in a superficial burn?
Epidermis
What area(s) is destroyed in a superficial partial thickness burn? (2)
Epidermis + superficial dermis
What area(s) is destroyed in a deep partial thickness burn? (2)
Epidermis + deep dermis
What area(s) is destroyed in a full thickness burn? (3)
- Epidermis + dermis + underlying structures
- Subcutaneous fat, nerves, tendons, bones
- Bone burn - esp fingers & toes - amputation
What is the appearance of a superficial burn?
Red and blistered
What is the appearance of a superficial partial thickness burn?
Red to pink, blistered. Brown is epidermis peeling off. Hair follicles alive.
What is the appearance of a deep partial thickness burn?
• Creamy moist white appearance
• Pseudomembrane (fluid film) may be present, oedematous
More scarring
What is the appearance of a full thickness burn?
- White, tan, black, bright red
- Redness around wound = infection = cellulitis
- Dry leathery appearance.
- No hair follicles.
What is the sensation like in a superficial burn?
Sensation intact, hypersensitive.
What is the sensation like in a superficial partial thickness burn?
Sensation intact, hypersensitive and painful.
What is the sensation like in a deep partial thickness burn?
• Sensation intact but maybe decreased
• sensation to light touch in some areas (some nerve
endings damaged)
What is the sensation like in a full thickness burn?
No light touch sensation because no nerves.
What is the sensation like in a superficial burn?
Rapid capillary return/blanching, because no capillaries in epidermis - no damage to circulation.
What is the sensation like in a superficial partial thickness burn?
Rapid capillary return/blanching
What is the sensation like in a deep partial thickness burn?
Delayed capillary return/blanching (5-6 seconds)
What is the sensation like in a full thickness burn? What does this cause?
- No capillary return/blanching
* Full thickness burn circumferentially around the limb will constrict blood flow around limb - compartment syndrome.
Is there wound closure in a superficial burn?
Wound closure spontaneously in 7-10-14 days
Is there wound closure in a superficial partial thickness burn?
Wound closure spontaneously in 14 days
Is there wound closure in a deep partial thickness burn?
From wound edge and epidermal appendages in >14 days
Is there wound closure in a full thickness burn?
Takes >3 weeks for closure (healing by secondary intention)
Need grafting
How can the size of the burn be measured?
Total body surface area affected (% TBSA)
Why is the total body surface area affected (% TBSA) important?
essential for accurate calculation of fluid replacement - prevent renal failures especially in bigger burn
What are 2 benefit of the Lund & Browder chart?
Fast (done in the ambulance)
Prioritise skin grafting & rehab by depth of burn