When encountering a patient covered in a green film with altered mental status, what should be your first step?

In a situation where a patient presents with a green film on their body and altered mental status, the primary concern should be the potential for exposure to a hazardous material. The presence of a green film suggests possible chemical contamination, which can pose serious risks not only to the patient but also to responders.

Requesting the hazmat team for decontamination is the most appropriate initial step because it ensures that the patient is safely and properly decontaminated before any further medical assessment or treatment is conducted. Hazmat teams are specially trained to handle situations involving hazardous materials, and their involvement is crucial in managing potential chemical risks.

Medical intervention, such as administering oxygen or starting IV fluids, should only occur after the patient has been decontaminated to prevent any adverse reactions from contamination affecting the healthcare providers. Additionally, performing a head-to-toe assessment before ensuring safety might expose the responder to harmful substances. Thus, prioritizing safety and the correct procedures for hazardous material exposure is essential in this scenario.