**Question:** The recommended treatment for suspected arsenic poisoning is

A. Hyperbaric oxygen therapy
B. Chelation therapy
C. Hyperbaric oxygen therapy and intravenous fluids
D. Chelation therapy and hyperbaric oxygen therapy

**Correct Answer:** B. Chelation therapy

**Core Concept:** Arsenic poisoning is a toxicological condition caused by exposure to arsenic, a heavy-metal element commonly found in the environment and some industrial processes. Arsenic poisoning can lead to severe health complications and organ damage.

**Why the Correct Answer is Right:** Chelation therapy is the correct treatment option for arsenic poisoning as it involves the administration of chelating agents that bind to the arsenic ions in the body, preventing their further distribution and facilitating their excretion. Arsenic is a highly toxic substance that can lead to severe health complications, including skin lesions, gastrointestinal symptoms, and cardiovascular, respiratory, and neurological issues. Chelating agents, such as dimercaprol (British Anti-Lewisite or BAL), dimercaprol (ubenimex), and penicillamine, help remove the arsenic ions from the body and reduce the severity of the poisoning.

**Why Each Wrong Option is Incorrect:**

A. Hyperbaric oxygen therapy is a treatment modality used for decompression sickness, nitrogen narcosis, and certain infectious diseases, but it does not directly address arsenic poisoning. Hyperbaric oxygen therapy aims to increase oxygen delivery to tissues, which is not relevant to arsenic poisoning management.

C. Combining hyperbaric oxygen therapy with intravenous fluids may provide some supportive care, but it does not address the primary issue of arsenic poisoning. Chelating agents are necessary to remove arsenic from the body and mitigate the toxic effects.

D. Chelation therapy combined with hyperbaric oxygen therapy does not provide a more effective treatment than chelation therapy alone. Hyperbaric oxygen therapy is not a direct treatment for arsenic poisoning and should be used alongside chelation therapy, not in place of it.

**Clinical Pearl:** In cases of suspected arsenic poisoning, it is essential to promptly initiate chelation therapy with agents like BAL, ubenimex, or penicillamine to remove arsenic from the body and reduce the severity of poisoning symptoms. Hyperbaric oxygen therapy and intravenous fluids should be considered as supportive care alongside chelation therapy.