US Patent 8968363 Tissue retractor and methods of use

Methods and devices for retracting tissue in a surgical procedure to allow access to the surgical site. Retractor systems and methods that comprise a retractor frame comprising rotatable arms and a linearly translatable arm, the rotatable arms and the linearly translatable arm each coupled to blades that can angulate. Systems for securing a retractor system to a patient's spine, the systems comprising a retractor blade and a shim device.