Suture tensioning device

#The present invention relates to methods and instruments for tensioning of sutures and, more specifically, to a novel suture tensioning device.

#Bone fixation using cerclage wire is a surgical procedure for securing fractured or weakened bone. Procedures in which bone cerclage may be indicated include, for example, humeral stem fracture repair and total shoulder surgery. After the cerclage wires are tensioned and wrapped, excess wire is cut off. The wire ends are tucked down to be out of the way. Wire ends that are tucked down improperly, or that become loose, can cause irritation and damage and may require additional revision.

#An improved surgical technique for attaching two sections of tissue, or for encircling a bone, with a high strength suture material is needed. Instruments and methods for repairing a bone fracture or for attaching two sections of tissues where placement of a suture, wire or cable is conducted without the tissue damage and irritation presented using cerclage wires are also needed.

#FIG. 1 illustrates a perspective view of a suture tensioning device according to a first embodiment of the present invention.

#FIG. 2 is a side view of the suture tensioning device of the present invention.

#FIGS. 3(a)-(b) illustrate various views of the lever of the suture tensioning device of the present invention.

#In the following detailed description, reference is made to various specific embodiments in which the invention may be practiced. These embodiments are described with sufficient detail to enable those skilled in the art to practice the invention, and it is to be understood that other embodiments may be employed, and that structural and logical changes may be made without departing from the spirit or scope of the present invention.

#The present invention provides a suture tensioning device used for applying tension to a length of suture (for example, high strength suture). The suture tensioning device includes a cannulated tube provided with an opening (for example, a longitudinal slit, or an opening at the distal end of the tube) that allows a suture to be fed through at least a portion of the tube. An adjustment device (for example, a wheel or a knob) is rotated to turn a threaded post on the end of the tube. A length of suture passes through the opening (for example, the longitudinal slit) of the cannulated tube and is secured into a forked pin attached to the adjustment device. Turning the adjustment device draws against the suture, increasing therefore the tension on the suture. The suture tensioning device may be employed in conjunction with a tensiometer.

#The invention also provides a method of tissue fixation (for example, graft of bone fixation) including wrapping the tissue (for example, a graft or fractured bone) with a length of high strength suture material and forming a slip knot in the length of suture. A post leg of the length of suture is threaded through at least a portion of the cannulated tube of the suture tensioning device and is secured into a forked pin attached to the adjustment device. Turning the adjustment device (for example, a wheel or a knob) pulls the suture taut and exerts tension on the suture. A scale may be provided on the suture tensioning device to indicate the relative amount of tension being applied. The tension to be applied by the surgeon on the suture depends on the tissue characteristics (for example, the bone quality) and other factors.