What is the best approach to communicate with a 23 year old deaf man who called for an ambulance?

While trying to speak clearly so he can watch your lips may seem like a potential approach, it is not the most effective method for communicating with a deaf individual. Instead, writing down questions on a pad provides a direct, clear form of communication that accommodates the individual's hearing impairment by allowing them to read and comprehend the information being conveyed. Engaging in gestural communication may not effectively convey complex information or questions that are essential in a medical emergency. Additionally, relying on vocal communication, whether loud or clear, is not suitable for someone who is deaf. Thus, the use of written communication is the best approach in this scenario, ensuring that the individual can fully understand what is being asked or discussed.