INTRODUCTION
Medical Anti-Shock Trousers (MAST or Anti-Shock Trousers) are a medical device of considerable controversy. There has been much debate over the benefit of this device and when it should be used. Recent studies have failed to show a substantial benefit in the treatment of shock by MAST trousers. Application of MAST trousers is often time consuming and involves additional movement of patient. These are undesirable factors when caring for a critically injured patient. Therefore, the use of MAST trousers is NOT recommended for use in hypovolemic shock. MAST trousers may be used to help immobilize pelvis and lower extremity fractures and to control bleeding in the lower extremities.

PERSONNEL TRAINING
Anti-Shock Trousers are to be applied only by EMS personnel who are licensed in the State of Michigan, and who have been trained in their application and use, Medical First Responders may place MAST on a patient but are not authorized to inflate.

CONTRAINDICATION TO THE USE OF MAST
MAST are NOT to be applied on patients known to have obstructive pulmonary disease (emphysema), pulmonary edema, or an apparent stroke. Obtain physician consultation prior to application in cases of cerebral edema.

REMOVAL OF MAST
Once anti-shock trousers are inflated, they are NEVER TO BE DEFLATED OR REMOVED EXCEPT UNDER THE DIRECTION OF A PHYSICIAN, and after an intravenous fluid infusion is established.

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