Wound Healing

Question 1

What are the 3 stages of wound healing?

Answer 1

1. Inflammatory stage
2. Fibroplastic stage
3. Remodeling stage

Question 2

What are the stages of inflammatory stage? Duration?

Answer 2

Usually last 1-5 days.

1. Vascular=vasoconstriction of vessels and edema.
2. Cellular=neutrophils destroy bacteria, material, damaged tissue.

Question 3

What happens during the fibroplastic stage? Duration?

Answer 3

Fibrin crisscross the wound forming latticework. Lasts 2-3 weeks.

Question 4

What are the stages of fibroplastic?

Answer 4

1. Migratory=Epithelial migration, capillary ingrowth, fibroblasts migrate.
2. Proliferative=Increase in epi thickness, capillaries contact counterparts, fibroblasts are lay down collagen.

Question 5

What occurs during remodeling stage?

Answer 5

• Collegen is replaced with new collegen.

- Increasing tensile strength

Question 6

What are the intentions of wound healing?

Answer 6

• Primary=Edges of wound are placed in same position before injury
• Secondary= Gap is left between edges of wound.
• Tertiary= Healing with tissue grafts to bridge gaps.

Question 7

What are the 3 nerve injury types?

Answer 7

1. Neurapraxia: Injury like compression with no loss of continuity of axon or endoneurium.
2. Axonotmesis=Injury like crushing that causes loss of axonal continuity, but not endoneurium
3. neurotmesis= injury like laceration that causes loss of both axonal and endoneurium continuity.