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ADULT CCRN CERTIFICATION MODULE 10 INTEGUMENTARY AND MUSCOSKELETAL
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ADULT CCRN CERTIFICATIONMODULE 10
INTEGUMENTERY AND MUSCOSKELETAL
4 PRACTICE TESTS
2024
1. What is the most common cause of cellulitis?
a) Staphylococcus aureus
b) Streptococcus pyogenes
c) Pseudomonas aeruginosa
d) Escherichia coli
Answer: b) Streptococcus pyogenes
Rationale: Cellulitis is a bacterial infection of the skin and subcutaneous
tissues, usually caused by streptococci or staphylococci. Streptococcus
pyogenes is the most common cause of cellulitis, especially in the lower
extremities.
2. Which of the following is a risk factor for developing IV infiltration?
a) Using a large-bore catheter
b) Inserting the catheter in an area of flexion
c) Securing the catheter with tape
d) Flushing the catheter with saline
Answer: b) Inserting the catheter in an area of flexion
Rationale: IV infiltration occurs when the IV fluid or medication leaks into the
surrounding tissue, causing swelling, pain, and tissue damage. Risk factors
for IV infiltration include using a small-bore catheter, inserting the catheter in
an area of flexion, such as the antecubital fossa, using an unstable vein, and
infusing vesicant or irritating solutions.
3. What is the hallmark sign of necrotizing fasciitis?
a) Fever and chills
, b) Erythema and edema
c) Crepitus and gas formation
d) Purulent and foul-smelling discharge
Answer: c) Crepitus and gas formation
Rationale: Necrotizing fasciitis is a rare but life-threatening infection of the
skin, subcutaneous tissue, and fascia, caused by anaerobic bacteria that
produce gas and toxins. The hallmark sign of necrotizing fasciitis is crepitus
and gas formation under the skin, which can be palpated or heard with a
stethoscope. Other signs and symptoms include fever, chills, severe pain,
erythema, edema, blisters, necrosis, and systemic toxicity.
4. What is the most reliable method to assess the depth of a pressure
injury?
a) Measuring the length and width of the wound
b) Using a wound classification system
c) Visualizing the wound bed and tissue types
d) Performing a tissue biopsy
Answer: c) Visualizing the wound bed and tissue types
Rationale: Pressure injuries are localized damage to the skin and underlying
tissue caused by prolonged pressure or shear forces. The depth of a
pressure injury depends on the extent of tissue loss and exposure of
underlying structures, such as muscle, bone, or tendon. The most reliable
method to assess the depth of a pressure injury is to visualize the wound
bed and identify the types of tissue present, such as granulation, slough,
eschar, or necrotic tissue.
5. What is the best way to prevent wound infection?
a) Applying topical antibiotics
b) Using sterile dressings
c) Performing wound irrigation
d) Maintaining a moist wound environment
Answer: d) Maintaining a moist wound environment
Rationale: Wound infection is a complication of wound healing that can delay
healing, increase pain, and cause systemic illness. The best way to prevent
wound infection is to maintain a moist wound environment that promotes
granulation and epithelialization, while preventing dehydration and bacterial
colonization. Topical antibiotics are not recommended for routine use as they
can cause allergic reactions, bacterial resistance, and toxicity. Sterile dressings
are not necessary for clean wounds as they can increase costs and waste.
Wound irrigation can be used to remove debris and bacteria from contaminated
wounds, but it can also damage healthy tissue if done too forcefully or too
frequently.
, 1. Which of the following statements is true about cellulitis?
A. Cellulitis is an infection of the deep layers of the skin and subcutaneous
tissues.
B. Cellulitis is caused by vasospasms leading to compromised blood flow
and tissue necrosis.
C. Cellulitis typically presents with severe pain and blistering rash.
D. Cellulitis is commonly caused by allergic reactions to certain medications.
Answer: A. Cellulitis is an infection of the deep layers of the skin and
subcutaneous tissues.
Rationale: Cellulitis is a bacterial infection that affects the deeper layers of
the skin and underlying tissues. It causes redness, inflammation, warmth,
tenderness, and swelling at the affected site. Vasospasms, blistering rash,
and allergic reactions are not associated with cellulitis.
2. What is the most appropriate initial nursing intervention when a patient
develops an infiltrated intravenous (IV) site?
A. Remove the infiltrated IV catheter immediately.
B. Apply a warm compress to the infiltrated area.
C. Elevate the affected extremity above heart level.
D. Flush the infiltrated area with a sterile saline solution.
Answer: A. Remove the infiltrated IV catheter immediately.
Rationale: When an IV site becomes infiltrated, the first step is to remove the
infiltrated IV catheter to prevent further tissue damage. Applying heat,
elevating the extremity, or flushing the area with saline would not address
the underlying issue of infiltration.
3. Which of the following represents a characteristic feature of necrotizing
fasciitis?
A. Rapid spread of infection through the epidermal layer.
B. Formation of hardened scar tissue at the infection site.
C. Destruction of the superficial layers of the skin only.
D. Deep tissue involvement with severe pain and necrosis.
Answer: D. Deep tissue involvement with severe pain and necrosis.
Rationale: Necrotizing fasciitis is a rapidly progressing bacterial infection that
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