| CPC A61B 34/30 (2016.02) [A61B 34/71 (2016.02); A61B 2034/301 (2016.02); A61B 34/37 (2016.02); A61B 2090/504 (2016.02)] | 20 Claims |

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1. A support structure, comprising:
a base joint coupling a proximal link of the support structure to a base, wherein the proximal link is configured to rotate about a first axis associated with the base joint; and
a linkage mechanism,
wherein the linkage mechanism maintains an orientation of an instrument support relative to the base as the support structure is moved from a first configuration to a second configuration, wherein in the second configuration, the support structure is rotated relative to the base about the first axis.
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