Certified wound specialist (CWS) eligibility and upkeep

How does zinc deficiency MOST directly impair wound healing?

1. increased metalloproteinase activity degrading matrix

   Metalloproteinases are themselves zinc-dependent enzymes, so a zinc shortage does not raise their activity; excess MMPs belong to chronic inflammation.
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2. enhanced angiogenesis producing fragile capillaries

   A deficiency slows the proliferative phase, new vessel growth included; overabundant fragile capillaries describe hypergranulation, not low zinc.
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3. an excessive, prolonged inflammatory response in the wound

   Low zinc weakens immune defenses rather than amplifying inflammation; a stalled, overactive inflammatory phase points to infection, foreign material or another persistent stimulus.
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4. reduced fibroblast proliferation and collagen synthesis

   Zinc is a cofactor for the enzymes behind DNA synthesis and cell division, so a deficit slows fibroblast replication and the collagen those cells lay down.
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Select an answer to record it. The card then marks the key and opens the reasoning under every choice.

A patient with an infected stage 4 pressure injury has a prealbumin of 12 mg/dL and a C-reactive protein of 90 mg/L. Which interpretation is MOST accurate?

1. Low prealbumin reflects inflammation and cannot by itself confirm malnutrition

   Prealbumin acts as a negative acute-phase protein and falls when CRP is 90 mg/L, so a low value here mostly reflects the infection and cannot confirm malnutrition alone; that is judged by intake, weight change and examination.
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2. Low prealbumin confirms severe protein malnutrition requiring tube feeding

   This treats one lab value as a diagnosis; malnutrition is defined by clinical criteria, and the feeding route depends on whether the patient can eat.
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3. Prealbumin is falsely raised by inflammation, so true protein stores are lower

   Inflammation pushes prealbumin down, not up, so this reverses the direction of the acute-phase effect.
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4. Prealbumin reflects the average dietary protein intake over the past 3 months

   With a half-life of about 2 days, prealbumin reflects a few recent days at most; a three-month picture comes from the weight and diet history.
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A child with epidermolysis bullosa has multiple open blisters and erosions. Which dressing approach is MOST appropriate?

1. a hydrocolloid dressing with an adhesive border edge

   Hydrocolloid adhesive bonds to the skin and lifts the epidermis when removed, the exact injury EB care tries to prevent.
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2. a silicone mesh contact layer held with roller gauze

   Epidermolysis bullosa skin blisters with friction or adhesive pull, so a non-adherent silicone layer secured by roller gauze instead of tape protects intact skin and lets exudate pass.
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3. dry gauze taped snugly around the whole limb

   Dry gauze sticks to erosions and tears new epithelium on removal, and tape on blistering skin creates fresh lesions.
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4. an acrylic-bordered silver foam on each wound

   An acrylic adhesive border strips and blisters this fragile skin at every change, and silver is not needed for uninfected erosions.
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Late radiation injury to skin and soft tissue impairs healing because the irradiated tissue becomes:

1. hyperemic, hypercellular, and edematous

   A hyperemic, edematous picture is the acute reaction during treatment; months or years later the tissue is pale, fibrotic and poorly vascularized.
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2. hypervascular, hypercellular, and well perfused

   Surface telangiectasia can look vascular, but the dermis beneath it has narrowed small arteries and poor perfusion.
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3. hypoxic, hypocellular, and hypovascular

   Late radiation injury causes obliterative endarteritis and fibrosis, so the tissue becomes hypoxic, hypocellular and hypovascular; this triad is the rationale for hyperbaric oxygen in delayed radiation injury.
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4. acidotic, hypercellular, and hyperperfused

   Irradiated tissue is not acidotic and hyperperfused with excess cells; over time it loses cells and blood flow and ends up fibrotic.
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