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Large Animal Surgery > Wound Management > Flashcards

Flashcards in Wound Management Deck (26)
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1
Q

What diagnostics do you want to perform on a wound?

A
  • PE, radiographs, US, probing
2
Q

What bacteria do you want to make sure horses are vaccinated against? How should you treat if vaccine status unknown? if unvaccinated?

A
  • Vaccinate for Clostridium tetani
  • If status unknown —> give tetanus toxoid
  • If unvaccinated –> give tetanus toxoid AND tetanus antitoxin
3
Q

What is an example of an open wound? Closed wound?

A
  • Open –> partial/ full thickness

- Closed –> crushing/ contusion

4
Q

What are the different wound classification?

A

Clean
Clean-contaminated
Contaminated
Infected/ dirty

5
Q

What is the “golden period” of wounds?

A

Period of time when there is less than 10^5 bacteria/ g of tissue

NOT IN HORSES

6
Q

What is primary closure?

A

Immediate closure only with clean/ clean-contaminated wounds

7
Q

What is delayed primary closure?

A

Waiting 2-5 days after injury but before granulation tissue forms –> used on contaminated wounds

8
Q

What is secondary closure?

A

Closing >5 d after injury –> used in contaminated/ infected wounds

9
Q

What is second intention healing?

A

Granulation tissue forms, wound contracts, epithelialization occurs

10
Q

What is the goal of wound closure?

A

Return damaged tissue to best possible function and appearance via manipulation of the healing process

11
Q

What are the 3 phases of wound healing? Describe each of them

A
  • Inflammation/ Lag phase – includes hemostasis and acute inflammation
  • Proliferation – includes tissue formation
  • Remodeling – tissue regains strength
12
Q

Describe inflammation/ lag phase in more detail

A
  • Hemostasis includes platelet aggregation, vasoconstriction to vasodilation, then fibrin deposition
  • Inflammation include wound repair mediators released from platelets, as well as PMNs, macrophages, and fibroblasts (remove damaged tissues)
13
Q

Describe the proliferative phase in more detail

A
  • Macrophages release growth factors –> induces angiogenesis, fibroplasia, collagen deposition, epithelialization, wound contraction
14
Q

What initiates angiogenesis?

A

Decreased O2 tension, high lactate, low wound pH

15
Q

When does epitheliazation start? when does the wound being to contract?

A
  • Epithelialization occurs immediately after damage

Contraction begins 2 weeks after injury, stops when skin tension is greater than the ability to contract

16
Q

When does the remodeling phase start?

A
  • starts 2 weeks after injury can last for years

- Following scar is weaker than original skin

17
Q

Where do you cut for sheep skin incision? What are your landmarks? How deep do you cut?

A
  • Cut on L flank with 6” incision
  • Caudal to 13th rib, ventral to tranverse processes of lumbar vertebra, cranial to tuber coxae
  • Cut through skin, SQ, cutaneous trunci only
  • Close in 2 layers
18
Q

What closure patterns do you want to use on the skin incision?

A
  • Close cutaneous trunci m and SQ together with simple continuous and bury knots with 3-0 polydiaxanone
  • Close skin with 2-0 non-absorbable with free choice of patterns
19
Q

What drugs do you want to give peri op for skin incision?

A
  • Give meloxicam 1mg/kg once the night before
  • Give thiamine 5mg/kg immediately post op when patient standing
  • Remove sutures 11-14 days post op
20
Q

What should be included in your initial wound prep?

A

Glove, clip, water soluble gel

21
Q

What is the purpose of debridement?

A
  • Most important factor in success
  • Removes necrotic tissue, bacteria, foreign materal
  • Can be sharp, irrigation, direct contact
22
Q

What should be included in your wound lavage?

A
  • non- toxic solution with appropriate pressure/ volume
  • Don’t use dilute antiseptics
  • Don’t put something in the wound that you wouldn’t eat or put in your eye
23
Q

What are some examples of hypertonic saline dressing and when would you want to use them?

A
  • Curasalt/ 20% hypertonic saline

- Exudative or necrotic wounds –> switch tissue once resolved

24
Q

What is negative pressure wound healing beneficial?

A

Allow for more rapid healing

25
Q

T/F

Corticosteroids are useful for wound healing

A

FALSE

Don’t use steroids, not even for granulation tissue reduction

26
Q

What causes chronic wounds and how do you treat them?

A
  • Caused by patients/ owners delaying treatment
  • Requires surgical excision, topical agents, bandaging
  • Granulation tissue killing agents may also kill epithelium