Abstract: An approximator having at least one pair of parallel guide bars which are connected to each other rigidly on one of their adjacent ends, and having at least one clamp of which one is arranged longitudinally displaceable on the guide bars of a pair and is fixable on these in any desired displaced position. At least one additional bar pair each with respectively one displaceable and fixable clamp. The additional bar pair is pivotally connected with the at least one first mentioned bar pair and with respect to this bar pair is fixable in selective relative positions.

Abstract: This disclosure relates to a clip for surgical purposes comprising a coil spring having at least one loop and a pair of crossing legs. The ends of the legs which extend beyond the crossing point are formed as clamping jaws. Because the portions of the legs adjoining the loop extend generally parallel to one another and the ends of the legs run side-by-side, and because a ring is provided at the crossing point for holding the legs together, the clip can be constructed with such small dimensions that it is particularly advantageously useful for neurosurgical purposes.