Abstract: A device for infusion or aspiration that includes a base and at least one needle positioned within the base, where the base includes one or more locators for positioning the infusion device in relation to one or more predetermined anatomical features. A device for infusion or aspiration that comprises a drive assembly and a plurality of needles positioned within the drive assembly. A method for performing infusion or aspiration that includes the steps of establishing the location of the surface of a bone using the tip of a needle and then driving the needle into the bone a predetermined distance from the established location of the surface of the bone.

Abstract: A tourniquet includes a tensioning mechanism configured to provide a continuous range of adjustment of tension applied by the tourniquet. The tensioning mechanism includes a housing, an arbor coupled to the housing, the arbor being connected to the strap, and a crank assembly coupled to the arbor. The crank assembly includes a crank, and at least one gear mechanism coupled to the crank and to the arbor. In one embodiment, the at least one gear mechanism includes a worm shaft and a worm wheel. In another embodiment, the crank is movable between a use position and a stowed position. A method of restricting blood flow to a portion of a limb is further disclosed.