Use of hyperbaric oxygen in toxicology

Area of Science:

• Toxicology
• Hyperbaric Medicine
• Emergency Medicine

Background:

• Hyperbaric oxygen (HBO) therapy is increasingly recognized for its potential in treating diverse toxicological injuries.
• HBO therapy provides excess dissolved oxygen, supporting life and potentially enhancing toxin clearance.
• Emerging evidence suggests HBO modulates inflammatory responses, like PMN-endothelial interactions, and prevents oxidative tissue damage.

Purpose of the Study:

• To review the physiological basis and clinical evidence for using HBO in treating various toxin exposures.
• To address the limitations and criticisms regarding the lack of controlled clinical trials in hyperbaric medicine.
• To provide guidance on the appropriate application of HBO therapy for toxicological emergencies.

Main Methods:

• Literature review of studies investigating HBO therapy for different toxin exposures.
• Analysis of the physiological mechanisms underlying HBO's effects in toxicology.
• Evaluation of the existing clinical evidence, focusing on controlled trials and case reports.

Main Results:

• HBO therapy has a clear physiological rationale for treating certain toxins, including enhancing oxygen delivery and reducing oxidative stress.
• Significant limitations exist due to the rarity of most toxin-induced conditions, impeding controlled clinical trials.
• Evidence for efficacy is strongest for carbon monoxide (CO) poisoning, where patient volumes allow for studies.

Conclusions:

• While HBO therapy offers a physiological basis for treating various toxins, its clinical application is limited by a lack of robust evidence for most conditions.
• The use of HBO should be reserved for carefully selected patients with severe toxin exposure, those unresponsive to standard treatments, or at risk of long-term complications.
• Further research and controlled trials are needed to establish the efficacy of HBO therapy for a broader range of toxicological emergencies.