Following a boating injury in an industrial-use river, a patient begins to display fever, tachycardia, and a rapidly expanding area of erythema, blistering, and drainage from a flank wound. An x-ray shows gas in the soft tissues. Which of the following measures is most appropriate?

**Core Concept**
The patient's presentation is consistent with a gas gangrene infection, likely caused by Clostridium perfringens, which produces alpha-toxin that leads to tissue necrosis and gas production.

**Why the Correct Answer is Right**
The administration of hyperbaric oxygen is the most appropriate measure in this scenario. Hyperbaric oxygen therapy (HBOT) has been shown to inhibit the growth of Clostridium perfringens and reduce the production of alpha-toxin, thereby limiting tissue damage and promoting wound healing. Additionally, HBOT can help reduce the severity of systemic symptoms such as fever and tachycardia by reducing the metabolic rate of the bacteria.

**Why Each Wrong Option is Incorrect**
**Option A:** Administering systemic antibiotics is not sufficient to treat gas gangrene as the bacteria are anaerobic and the infection is often too extensive for antibiotics to reach.
**Option B:** Surgical debridement is essential in treating gas gangrene, but it is not the most immediate or appropriate measure in this scenario, as the patient requires urgent stabilization and medical management.
**Option C:** The patient does not require a fasciotomy, as the primary concern is the infection and gas production in the soft tissues, rather than compartment syndrome.

**Clinical Pearl / High-Yield Fact**
In cases of suspected gas gangrene, it is essential to administer hyperbaric oxygen therapy promptly to reduce tissue damage and improve outcomes.

**Correct Answer:** C.

✓ Correct Answer: C. Wide debridement