The invention relates to a noose 1 for internal organs. Noose 1 has a tube 2 for securement to a fixed point in the body a loop of flexible material 4 adjacent one end of the tube adapted to surround a body part adjacent one end of the tube a slider 7 in the tube adapted to slide from a first position to a second position in the tube, said slider being of magnetic material or material attracted to a magnet a link member 9 connecting the slider to the loop, said tube loop slider and link member being in-vivo components and an ex-vivo controller 10 having a magnet or material attracted to a magnet adapted to cause, the magnet to slide from the first to the second position and vice versa. In use as the magnet moves from the first position to the second position so the loop is drawn into said one end of the tube so shrinking its diameter from enlarged loop to a smaller size loop thereby tightening around the part of the body it surrounds.
