Patent ID: 8608746
Filing Date: 2013-12-17
Classification: A61B

Abstract:
1. An instrument for manipulating and a bone anchor and a spinal fixation element offset from the bone anchor, the instrument comprising: a shaft having a proximal end, a distal end, and a lumen extending between the proximal end and the distal end, one or more fingers disposed at the distal end of the shaft configured to engage a spinal fixation element receiving member of a bone anchor and defining a slot for receiving a spinal fixation element offset from the spinal fixation element receiving member; an outer sleeve disposed about the shaft and configured to slide over the distal end of the shaft between a first position and a second position, when the outer sleeve is in the first position, the one or more fingers are unconstrained by the outer sleeve allowing the one or more fingers to receive the spinal fixation element in the slot and engage the spinal fixation element receiving member, when the outer sleeve is in the second position, the one or more fingers are constrained by the outer sleeve securing the spinal fixation element in the slot and the engagement of the spinal fixation element receiving member of the bone anchor by the one or more fingers to permit manipulation of the spinal fixation element and bone anchor by the instrument; and a reduction element configured to pass through the lumen of the shaft and engage the offset spinal fixation element to reduce the offset spinal fixation element into the spinal fixation element receiving member of the bone anchor, the reduction element being configured to insert a closure mechanism into the bone anchor to restrict motion of the spinal fixation element relative to the bone anchor, wherein the shaft comprises a plurality connection elements each being configured to engage a connector for connecting the instrument to another instrument, wherein the outer sleeve comprises a second slot corresponding to the slot defined by the one or more fingers, the second slot being configured to receive the spinal fixation element that is offset from the spinal fixation element receiving member when the outer sleeve is in the second position.