Illustration (a) and photograph (b) of the directable needle guide (DNG). A segmental flattening on the same side as the bevel of the tip (arrowheads) increases the pliancy of the needle in the direction of the bevel side, resulting in curving exclusively to the beveled tip side during advancement within tissues. The tail of the DNG is bent toward the tip side to signify the direction of the curve during advancement. A torque device (arrow) makes it easy to rotate the DNG.