CWCA CWCA Advanced Wound Therapies 1 — Questions and Answers
Question 1: Negative Pressure Wound Therapy (NPWT) promotes wound healing primarily by:
- Delivering oxygen directly to wound tissue
- Removing excess exudate and promoting granulation tissue formation (Correct answer)
- Providing antimicrobial protection through continuous antibiotic delivery
- Closing wound edges with mechanical suture-like tension
Correct answer: Removing excess exudate and promoting granulation tissue formation
NPWT uses sub-atmospheric pressure to remove exudate, reduce edema, and stimulate angiogenesis and granulation tissue formation.
Question 2: Which of the following is a contraindication for Negative Pressure Wound Therapy (NPWT)?
- Chronic venous ulcer with moderate exudate
- Wound with untreated osteomyelitis (Correct answer)
- Post-surgical dehisced abdominal wound
- Diabetic foot ulcer with adequate arterial supply
Correct answer: Wound with untreated osteomyelitis
NPWT is contraindicated in wounds with untreated osteomyelitis because negative pressure can spread infection into bone or surrounding tissue.
Question 3: The standard negative pressure setting for NPWT in most clinical applications is:
- -25 to -50 mmHg
- -75 to -125 mmHg (Correct answer)
- -150 to -200 mmHg
- -200 to -250 mmHg
Correct answer: -75 to -125 mmHg
Most NPWT protocols use -75 to -125 mmHg, with -125 mmHg being the most commonly used therapeutic pressure.
Question 4: Hyperbaric Oxygen Therapy (HBOT) for chronic wounds works by:
- Providing topical antimicrobial coverage to the wound surface
- Delivering high concentrations of oxygen under increased atmospheric pressure to hypoxic tissue (Correct answer)
- Mechanically debriding necrotic tissue via pressurized oxygen jets
- Reducing wound edema through osmotic fluid removal
Correct answer: Delivering high concentrations of oxygen under increased atmospheric pressure to hypoxic tissue
HBOT increases dissolved oxygen in plasma under pressure, delivering oxygen to hypoxic wound tissue where hemoglobin-bound oxygen cannot reach.
Question 5: Biological skin substitutes used in chronic wound care are best indicated for:
- Infected wounds requiring debridement
- Full-thickness wounds failing to progress with conventional therapy (Correct answer)
- Superficial abrasions with minimal tissue loss
- Wounds with heavy necrotic burden
Correct answer: Full-thickness wounds failing to progress with conventional therapy
Bioengineered skin substitutes are indicated for non-infected, clean full-thickness wounds that have not healed adequately with standard wound care.
Question 6: Which dressing type uses electrical current to promote wound healing and reduce biofilm?
- Hydrocolloid dressing
- Bioelectric dressing (Correct answer)
- Foam dressing with silver
- Collagen matrix
Correct answer: Bioelectric dressing
Bioelectric dressings generate low-level electrical current that disrupts bacterial biofilm and stimulates tissue repair processes.
CWCA CWCA Advanced Wound Therapies 1
Negative Pressure Wound Therapy (NPWT) promotes wound healing primarily by: