To the Editor: Antishock trousers are frequently used in the initial resuscitation of the trauma patient in hypovolemic shock. As with many therapies, there are numerous anecdotes that extol the virtues of antishock trousers. No well-controlled studies exist, however, that document their efficacy. One misconception regarding antishock trousers has survived the past decade. Inflation of all three compartments of the trousers is purported to autotransfuse 750 to 1500 ml of blood from the lower extremities and abdomen to the central circulation. Although this belief is frequently repeated in discussion of antishock trousers, no scientific studies have confirmed this assertion. . .