SKIN- DISORDERS AND BURNS Flashcards
Explain the difference between first, second and third degree burns
- First degree = damage to the epidermis
- Second degree = damage to the dermis and epidermis
- Third degree = damage to the epidermis, dermis and hypodermis
What is a superficial epidermal burn and what does it look like?
The epidermis is damaged but the dermis is still in tact . The skin is red and painful but not blistered
What is it called when the epidermis and upper layers of the dermis are burned and what does it look like?
Partial thickness/ superficial dermis. Pale pink with some blistering
What is a partial thickness deep dermal burn and what does it look like?
The epidermis and both the upper and deeper layers of the dermis are involved. Skin is dry and moist and can be both painful and painless. May also be blistering
What is a full thickness burn?
Extends through all layers of the skin to the subcutaneous tissues. Painless with no blisters and skin is white, brown or black.
Why might burns be painless?
- Sensory neurons and sensory nerve endings all damaged and so pain cant be sensed
Define an autograft and an allograft
Autograft is when a patients own skin is used to replace skin and this reduces chances of immune rejection
Allograft is when a donor gives skin and this is usually from a cadaver
Which classification of burn is considered a critical burn?
Full thickness burn
What is psoriasis?
Abnormal epidermal growth and differentiation
What is malignant melanoma?
Malignant growth of melanocytes
What is vitiligo?
An autoimmune destruction of melanocytes
What is allergic contact dermatitis mediated by?
Langerhans cells
What is dermatitis and what are the 3 causes and types of the condition?
- Inflammation of the skin
Conditions:
- Environment –> Apical dermatitis
- Chemical –> Contact dermatitis
- Sebum –>Seboorheic dermatitis
