wounds

Question 1

wound healing phases

Answer 1

A. Inflammatory Phase (Substrate phase or lag phase)

1. 10% of the healing process
2. First reaction is Vasoconstriction which lasts 5-10 minutes
3. Second reaction is Vasodilation which lasts 3-4 days
4. Mesenchymal cells –> Fibroblast forms collagen which adds tensile strength
5. Epithelialization occurs at the end of the first phase

B. Fibroblastic Phase or Proliferative Phase

1. 20-35% of the healing process
2. This phase lasts 2-3 weeks

Note: Collagen synthesis is directly responsible for a wound obtaining tensile strength.

C. Maturation Phase

• Remodeling of collagen fibers, wound contracture and increase tensile strength
  1. 70% of the healing process
  2. This phase lasts up to one year

Question 2

what is the tensile strength of the wound at 14 days

Answer 2

The tensile strength of the wound equals 35% of the original strength of the skin at 14 days at this point the tensile strength of the wound equals the tensile strength of the suture.

Question 3

ABI of what is contraindicated for compression therapy

Answer 3

0.8

Question 4

Hydrocolloid dressing

Answer 4

maintain a moist wound environment while absorbing excess drainage and excudate

ie tegaderm, duoderm, hydropad

Question 5

Film dressing

Answer 5

composed of thin transparent adhesive polyurethane membrane. Provides a moist wound healing environment but holds no properties absorb wound exudate (used to cover IV catheters)

ie tegaderm

Question 6

Foam dressings

Answer 6

has high absorbency and can be used on infected wounds. Maintains moist environment but if wound has too little exudate, it can cause wound to dry out

Question 7

Hydrogel

Answer 7

indicated for dry wounds and to rehydrate. useful in deeper wounds where structures such as tendons need to kept moist

Question 8

alginates

Answer 8

alginate highly absorbent dressings made from seaweed that osmotically dries out wounds

Question 9

Film dressing

Answer 9

composed of thin transparent adhesive polyurethane membrane. Provides a moist wound healing environment but holds no properties absorb wound exudate (used to cover IV catheters)

ie tegaderm

Question 10

Foam dressings

Answer 10

has high absorbency and can be used on infected wounds. Maintains moist environment but if wound has too little exudate, it can cause wound to dry out

Question 11

Contraindications for wound vac

Answer 11

A.   Untreated osteomyelitis
B.   Malignancy in wound
C.   Exposed blood vessels or organs
D.  Non-enteric and unexplored fistula
E.   Necrotic tissue with eschar present