| CPC A61B 34/74 (2016.02) [A61B 17/29 (2013.01); A61B 34/20 (2016.02); A61B 34/35 (2016.02); A61B 2017/00039 (2013.01); A61B 2017/00075 (2013.01); A61B 2017/00199 (2013.01); A61B 2017/00212 (2013.01); A61B 2017/00221 (2013.01); A61B 2017/00398 (2013.01); A61B 2017/2908 (2013.01); A61B 2034/2048 (2016.02); A61B 2034/2051 (2016.02); A61B 2034/2061 (2016.02); A61B 2034/742 (2016.02); A61B 2034/743 (2016.02)] | 13 Claims |

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1. A user interface device for manipulating a robotic surgical tool in a surgical robotic system, comprising:
a device body having a proximal end and a distal end formed by a device head having a surface extending around a central axis and defining a larger cross-sectional profile than the proximal end;
a plurality of grip linkages distributed uniformly about the central axis and configured to generate a grip signal for manipulating a grip motion of the robotic surgical tool; and
a finger clutch mounted on the device head, wherein the finger clutch includes a conductive pad extending around the central axis; and
a user interface device processor electrically coupled to the conductive pad, which is configured to generate a clutch signal in response to detecting a change in a capacitance of the conductive pad, and in response to the clutch signal, the user interface device is prevented from controlling a spatial motion of the robotic surgical tool.
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