Employment of pneumatic anti-shock (MAST) equipment is a therapeutic possibility in some countries for hypovolaemic and shocked patients. This treatment may be associated with particularly serious side effects and no documentation is available to prove that MAST is beneficial for the patients. The only meticulous clinically controlled investigation concludes that MAST is without effect in city regions with well-trained paramedical or medical staff and employment of MAST can thus not be recommended. The effect of MAST outside urban regions is unknown and should be assessed by means of a clinically controlled investigation.