Patient-mounted retraction

A retractor assembly comprising:

• a cannulated retractor body having a proximal end, a distal end spaced apart from the proximal end along a first axis, and a bore that extends from the proximal end to the distal end along the first axis, the proximal end being centrally disposed along the first axis;
• a bone anchor including a distal end configured to be removably mounted to a vertebral body of a patient, the bone anchor having a head spaced from the distal end of the bone anchor;
• an anchor receptacle that is configured to receive the bone anchor and extends from the cannulated retractor body along a second axis that is angularly offset with respect to the first axis, such that a distance between the first and second axes at the proximal end of the cannulated retractor body is less than a distance between the first and second axes at the distal end of the cannulated retractor body, the anchor receptacle having a first end disposed along the cannulated retractor body and a second end spaced apart from the first end along the second axis, wherein an entirety of the second end of the anchor receptacle is spaced from the distal end of the cannulated retractor body along a direction that is transverse to the first axis;
• and
• a locking assembly configured to attach to the cannulated retractor body and within the anchor receptacle, the locking assembly further configured to attach to the head of the bone anchor such that when the cannulated retractor body is attached to the head of the bone anchor the second axis extends through the head of the bone anchor and the cannulated retractor body is selectively 1) polyaxially positionable with respect to the bone anchor or, 2) locked in a fixed position with respect to the bone anchor.

A surgical kit comprising:

• a first retractor body extending between a first proximal end and a first distal end opposed to the first proximal end, the first proximal end defined along a first axis, the first distal end of the first retractor body defining a first mounting member, the first mounting member being defined along a second axis that is offset with respect to the first axis such that the first mounting member is spaced apart from the first axis along a direction that is transverse to the first axis, the first mounting member extending around an entirety of the second axis, the first mounting member configured to rotatably attach to a first bone anchor that is configured to be disposed in a patient, wherein the first retractor body is rotatable about the first bone anchor when the mounting member is attached to the first bone anchor, and the retractor body defines a channel that extends from the first proximal end to the first distal end, such that the first and second axes extend through the channel;
• and
• a second retractor body extending between a second proximal end defined along a third axis and an opposed second distal end defined along a fourth axis that is offset with respect to the third axis, the second retractor body having a second mounting member defined along the fourth axis, the second mounting member configured to rotatably attach to a second bone anchor disposed in the patient such that the second retractor body is rotatable about the fourth axis.