A thigh tourniquet is applied and the leg is placed on a thigh support with the hip flexed to about 40° and abducted, and the leg hanging freely. When the leg hangs freely, the knee should flex to about 110°. The knee must be free to be flexed to at least 135° (Fig. 7.4). The thigh support must not intrude into the popliteal fossa to ensure that risk of damage to the great vessels is minimised.
