Abstract: A surgical strut for the treatment of the back-bone built of a rod having a circular cross-section provided with a thrust pin protruding at one side, a longitudinally cut sleeve mounted on the rod and a pectoral hook and a lumbar hook fitted on spinous processes of vertebrae. Along the cut of the sleeve skew recesses are made which constitute bearing surfaces for the pin mounted in the rod.One end of the sleeve, closer to the end of the rod, has the outer surface in a form of a cone. On the said surface the pectoral hook rests whose part of the inner surface of the hole is also conical forming the seat for the conical end of the sleeve. The thrust pin, the sleeve and the pectoral hook are situated on the same end of the rod of the strut.On the other end of the rod the lumbar hook of the known design is mounted. Skew recesses in the sleeve depending on the required adjustment pitch of the length of the strut are situated on the same side or alternately on both sides of the cut of the sleeve.

Abstract: This invention relates to an appliance for correction of spinal curvatures, performed in course of treatment by means of surgical struts.The appliance has a form of a double-arm lever making possible to extend the effective length of the strut placed in the patient's body, whereby one arm of said lever is ended with a holder for clamping the hook of the strut, the other arm being provided with a screw adjusting the spacing of the arms and the displacement of the hook along the strut. This arm is cut longitudinally, one part whereof being provided with a tapped hole wherein said adjusting screw operates, whereas the other part is provided with a port and with a pivot whereon the link mechanism and the pointer of a dynamometer are mounted. The side surface of said arm carries a scale whereover the tip of said pointer travels indicating the value of the force being applied to the operator.