| CPC A61B 17/025 (2013.01) [A61B 17/0206 (2013.01); A61B 17/86 (2013.01); A61B 2017/00477 (2013.01); A61B 2017/0256 (2013.01)] | 19 Claims |

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1. A blade system (100) for a surgical retractor tool (10), the surgical retractor tool (10) having a body including a plurality of arms moveable away from each other or towards each other in a controlled manner, comprising:
a retractor blade (18) for attachment to one of the plurality of arms of the surgical retractor, the retractor blade (18) having an elongate body portion (60), the elongate body portion (60) configured to extend from a position outside of an animal body to a spine bone of the animal body, the retractor blade (18) configured to distract tissue surrounding the retractor blade (18) to provide a visual pathway to a surgical site, a first end (16) of each retractor blade (18) including structures for attaching the retractor blade (18) to the retractor tool (10), a second end (28) of the retractor blade (18) including a grasping assembly (29) for grasping a shaft portion of a bone screw (30), the bone screw (30) securable to a bone for securing the retractor blade (18), and thus the surgical retractor tool (10), in a position with respect to the bone screw.
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