or to allow a more dedicated heavy rescue team in who has more equipment. Extrication units are supposed to not only have many different kinds of extrication tools, but medical equipment, oxygen, and backboards as well. Extrication is the entire process from fire protection, power unit disengagement, vehicle security, patient security and treatment, removal of vehicle from patient, removal of patient, and transfer to ambulance. As soon as possible, best before beginning the mechanical operation, a medically trained person enters the cabin to perform first aid on the casualty: mid-level assessment, stopping the bleeding, putting a cervical collar on the patient (extrication operations are likely to provoke vibrations) although this practice is becoming less common, providing oxygen first aid. NFPA regulation 1006 and 1670 states that all "rescuers", whether they are part of an EMS department, fire department, or police department, must have a minimum of basic life support medical training to perform any technical rescue operation, since it is a comprehensive patient-centered process. After the vehicle has been secured and access gained to the patient, the EMS team then enters to perform more detailed medical care. Continued protection of the patient from extrication itself, using hard and soft protection, should be done at all times. The deformation of the structure and the section of the roof take several minutes; this pre-extrication time can be used for medical or paramedical acts such as intubation or placing an intravenous drip. When the casualty is in cardiac arrest, cardiopulmonary resuscitation can be performed during the freeing, the casualty being seated. The use of this incompressible duration is sometimes called play and run, as a compromise between scoop and run (fast evacuation to a trauma center) and stay and play (maximum medical care onsite). The last step is usually performed with a long spine board: the patient is pulled up on it. A Kendrick extrication device (KED) is sometimes used during this operation to try to help immobilize the spine and prevent further injury. Extrication, as defined by NFPA must be done by medically certified individuals, and as such, many technical rescue teams are run by Emergency Medical Services departments. In major cities, where fire departments handle emergency medical services, fire departments may provide technical rescue. In many rural areas, volunteer EMS agencies handle technical rescue. There are some departments that are a combination of Fire/EMS, Police/EMS or dedicated EMS, but the concept