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

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