text: Army Aviation Operations
  the forward support MEDEVAC platoon in DS to the BCT evacuates the casualty from the AXP
  to a forward resuscitative surgical team in the BCT AO. From there, the casualty begins
  movement to higher levels of medical care in the division and Corp support areas, until being
  evacuated from theater by inter-theater AE assets.
  Figure 3–28. Example of medical evacuation request and execution
  3-165. Procedures for requesting MEDEVAC support must be institutionalized down to the lowest level.
  The 9-line MEDEVAC request provides a standardized message format that helps expedite the MEDEVAC
  process. The same format is used for both air and ground MEDEVAC requests. Some multinational
  partners may require or request additional information on the MEDEVAC request. This additional
  information may be included into MEDEVAC requests to United States MEDEVAC units. This
  information would be the incorporation of the MIST report at the end of the MEDEVAC request. The
  pneumonic “MIST” stands for—
  * M-Mechanism of injury.
  * I-Injury or illness sustained.
  * S-Signs and symptoms.
  * T-Treatment given.