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Table 1 Priority definitions and suggested responses in the Finnish EMS system

From: Medical priority dispatch codes—comparison with National Early Warning Score

Priority code A B C D
Definitions Serious disturbance of vital functions Suspicion of failure of vital functions Minor symptoms No disturbance of vital functions
High-energy mechanism of injury Mechanism of injury is suspected to lead on failure of vital functions Low-energy mechanism of injury  
Dispatch priority Immediately Immediately Patient reached within 30 min Patient reached within 120 min
EMS unit response FRU + ALS + (HEMS) ALS (+ FRU if quicker on scene) BLS or ALS BLS
Lights and sirens Lights and sirens Normal driving Normal driving
  1. FRU first responding unit, ALS advanced life support unit, BLS basic life support unit, HEMS Physician helicopter unit