Final answer:
The most appropriate method of transport for an athlete with a possible ankle dislocation is to activate EMS for trained emergency response, given the potential severity of the injury and the need for immediate professional care.
Step-by-step explanation:
When an athlete suffers an injury such as a possible ankle dislocation with significant deformity and pain, the most appropriate method of transport to the emergency department would be: to activate EMS for transport of the athlete by trained emergency medical technicians. EMS personnel can provide more immediate access to early reduction, monitor neurovascular status, and provide medication as needed for pain and inflammation. This professional response is crucial for potentially severe injuries like a Pott's fracture, where the deltoid ligament shears off the medial malleolus of the tibia, or severe inversion injuries that can rupture the lateral ankle ligaments and fracture the distal fibula. In comparison to transport by an untrained individual, EMS ensures the highest level of care throughout the transport process and can start essential treatment immediately.