Case series and clinical analysis of acute hydrogen sulfide poisoning: Experience from 10 cases at a hospital in Zhoushan

This study investigated the etiology, clinical features, and management of acute hydrogen sulfide (H₂S) poisoning in Zhoushan. A retrospective analysis was conducted on 10 patients admitted to our hospital between August and September 2023 due to two incidents of acute H₂S poisoning. The first incident involved fishermen working in a fishing cabin (6 patients), while the second involved sanitation workers during sewer maintenance (4 patients). Among the patients, 4 had severe poisoning, 3 had moderate poisoning, and 3 had mild poisoning. Corneal chemical injuries were observed in 4 severe patients, and chest CT scans showed bilateral infiltrative changes in 7 patients. Elevated lactate concentrations, and low oxygenation indices were noted in all severe patients. Severe cases received intensive care, including tracheal intubation, mechanical ventilation, corticosteroids, methylene blue, ulinastatin, and hyperbaric oxygen therapy. Patients with mild to moderate symptoms received supportive treatments, including oxygen therapy and hyperbaric oxygen therapy. With the exception of one fatality, all other patients were discharged after successful treatment. Fishing boat cabins and decomposed sewage channels in island areas are common sites for acute H₂S poisoning. Rapid identification of H₂S poisoning and evaluation are crucial. Early airway management is essential for severe cases to prevent vital organ hypoxia.