Force sensing for surgical instruments
First Claim
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1. A surgical instrument, comprising:
- a housing portion configured to interface with a manipulator arm of a robotic surgical system;
a shaft including;
a proximal end coupled to the housing portion, a distal end, a distal end portion extending proximally from the distal end, a lengthwise axis defined from the proximal end to the distal end, and an anti-friction outer surface;
a plurality of strain gauges mounted on the distal end portion of the shaft adjacent to the distal end of the shaft;
a wrist joint operably coupled to the distal end of the shaft; and
an end effector operably coupled to the wrist joint.
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Abstract
An apparatus, system, and method for improving force and torpg,que sensing and feedback to the surgeon performing a telerobotic surgery are provided. In one embodiment, a surgical instrument, a robotic surgical system, a cannula, a cannula seal, and a method for improved sensing of z-axis forces on a robotic surgical instrument are disclosed.
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Citations
21 Claims
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1. A surgical instrument, comprising:
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a housing portion configured to interface with a manipulator arm of a robotic surgical system; a shaft including;
a proximal end coupled to the housing portion, a distal end, a distal end portion extending proximally from the distal end, a lengthwise axis defined from the proximal end to the distal end, and an anti-friction outer surface;a plurality of strain gauges mounted on the distal end portion of the shaft adjacent to the distal end of the shaft; a wrist joint operably coupled to the distal end of the shaft; and an end effector operably coupled to the wrist joint. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A robotic surgical system, comprising:
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a manipulator assembly including a manipulator arm; a surgical instrument operably coupled to the manipulator arm, the surgical instrument including; a housing portion configured to interface with the manipulator arm of the robotic surgical system; a shaft including;
a proximal end coupled to the housing portion, a distal end, a distal end portion extending proximally from the distal end, a lengthwise axis defined from the proximal end to the distal end, and an anti-friction outer surface;a plurality of strain gauges mounted on the distal end portion of the shaft adjacent to the distal end of the shaft; a wrist joint operably coupled to the distal end of the shaft; and an instrument tip operably coupled to the wrist joint; and a force sensor mounted on the manipulator assembly, wherein the force sensor is configured to sense an axial force along the lengthwise axis of the shaft. - View Dependent Claims (17, 18, 19, 20)
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21. A method comprising:
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positioning a force sensor distal to an annular rib, wherein the force sensor is located on a distal end portion of a shaft of a robotic surgical instrument, and wherein the annular rib extends radially inward from an inner surface of a tubular member of a cannula; and sensing a force on the robotic surgical instrument using the force sensor.
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Specification