Two cars were involved in a high-speed collision on the Fosse Way near Cloudesley Bush Farm, Monks Kirby on Friday.
Warwickshire and Northamptonshisre Air Ambulance used its helicopter and rapid response vehicle to attend the incident. East Midlands Ambulance Service and West Midlands Ambulance Service were also in attendance.
The helicopter landed on the scene at approximately 10.35am with the rapid response vehicle arriving 15 minutes later.
Four people were involved in the collision, two of which were assessed by the WNAA doctor and paramedics.
One patient, a 19-year old man, was assessed by the team after he freed himself from the vehicle. He was discharged without any injuries.
The second patient, also a 19-year old man, was still trapped in his vehicle and sustained potential pelvic injuries.
He was extricated from the vehicle by the fire and rescue service. The WNAA doctor administered pain relief, anti-sickness medication and a drug to help with blood-clotting. He was also given a pelvic binder before being transferred to University Hospitals Coventry & Warwickshire by EMAS. The doctor travelled with the patient to monitor his condition. His current condition is unknown.
The remaining two patients were taken to hospital by road. Their conditions are not thought to be serious.