Wounds Flashcards
Name the 4 types of wounds
Erosion, ulceration, partial thickness and full thickness
Describe erosion wounds
Loss of epidermis
Describe ulceration wounds
Deep into epidermis
Describe partial thickness
Epidermis and part of dermis
Describe full thickenes
All of epidermis and deep into dermis
What is the mechanism of wound healing
To prevent infection, dehydration and bleeding
What are the 3 stages of wound healing?
- Inflammation
- Proliferation
- Tissue remodelling
Describe the inflammation stage
Platelets appear and initiate haemostasis and the healing cascade by releasing growth factors. This trigger vasodilation, which increases the permeability of blood vessels. White blood cells also work to clear bacteria and microorganisms from the wound. The migration of cells to this area causes redness and swelling
Describe phase 1 of tissue proliferation
Keratinocytes move to the wound edge and become flatter. They then migrate by 2 methods: Train method or leap frog method. As soon as the wound is covered in a single layer of keratinocytes, the keratinocytes being to proliferate
Describe phase 2 of tissue proliferation
Endothelial cells migrate and proliferate. Fibroblasts multiply and produce collage, which is deposited haphazardly to form granulation tissue. Inflammation sign dissapear, and fibroblasts contract, pulling the edges of the wounds together
Describe tissue remodelling
Granulation tissue becomes scar tissue, and collagen is cross- linked to form a scar
What is rubor
redness
What is tumour
Swelling
What is calor
Heat
What is dolar
pain
