Apparatus for supporting a surgical instrument

An apparatus (1) for supporting a surgical instrument in the operative environment of an imaging device comprises components all made of a material compatible for use in the operative environment of the imaging device. The components of the apparatus (1), made of such a material, include a member (32) that has a spherical surface and includes a bore (50) extending through the member along its diameter. A grip (26) has a grip surface defining an aperture that is adapted to receive the member for rotatable movement within the aperture. The grip (26) extends around the member (32) in a circumferential path and has a gap therein. A fastener (30) is operatively connected to the grip (26). The fastener (30) is adjustable to change the size of the gap and adjust the compressive force applied to the received member (32) in the grip.