Grip strength with tactile feedback for robotic surgery
First Claim
Patent Images
1. A method comprising:
- squeezing first and second grip members together with a hand of an operator;
moving first and second end effector elements in response to the squeezing of the grip members according to a control relationship; and
altering the control relationship when the grip members are near a closed configuration;
wherein the control relationship imposes a following force on the end effector elements with an actuator so that the following force varies in response to a misalignment between a grip separation and an end effector separation.
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Accused Products
Abstract
Surgical robots and other telepresence systems have enhanced grip actuation for manipulating tissues and objects with small sizes. A master/slave system is used in which an error signal or gain is artificially altered when grip members are near a closed configuration.
1771 Citations
24 Claims
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1. A method comprising:
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squeezing first and second grip members together with a hand of an operator;
moving first and second end effector elements in response to the squeezing of the grip members according to a control relationship; and
altering the control relationship when the grip members are near a closed configuration;
wherein the control relationship imposes a following force on the end effector elements with an actuator so that the following force varies in response to a misalignment between a grip separation and an end effector separation. - View Dependent Claims (2, 3, 4, 5)
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6. A method comprising:
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squeezing first and second grip members together with a hand of an operator;
moving first and second end effector elements in response to the squeezing of the grip members according to a control relationship; and
altering the control relationship when the grip members are near a closed configuration, wherein the control relationship altering step is performed so that an actuator imposes a first following force when the grip members are away from the closed position and a difference between a first grip separation and a first end effector separation defines a first separation misalignment, and so that the actuator imposes a second following force when the grip member are adjacent the closed position with the first misalignment, the second following force being different than the first following force. - View Dependent Claims (7, 8)
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9. A method comprising:
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squeezing first and second grip members together with a hand of an operator;
moving first and second end effector elements in response to the squeezing of the grip members according to a control relationship;
altering the control relationship when the grip members are near a closed configuration, detaching the end effector elements from a servomechanism and attaching alternative first and second end effector elements, the alternative end effector elements having different strengths than the end effector elements; and
revising the control relationship altering step in response to the strengths of the alternative end effector elements.
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10. A method comprising:
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squeezing first and second grip members together with a hand of an operator;
moving first and second end effector elements in response to the squeezing of the grip members according to a control relationship; and
altering the control relationship when the grip members are near a closed configuration, wherein the end effector elements comprise cooperating surgical instrument jaws defining the closed configuration by engagement therebetween, and wherein the control relationship altering step comprises imposing a greater following force against an object for a given separation misalignment when the jaws are near the closed configuration so as to allow the jaws to impose a maximum following force with a small tissue therebetween. - View Dependent Claims (11)
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12. A method comprising:
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squeezing first and second grip members together with a hand of an operator;
moving first and second end effector elements in response to the squeezing of the grip members according to a control relationship;
altering the control relationship when the grip members are near a closed configuration; and
moving the end effector elements in a workspace with uniform following forces in response to movement of the grip elements in a plurality of degrees of freedom substantially throughout associated ranges of motion of the end effector.
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13. A method comprising:
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squeezing first and second grip members together with a hand of an operator;
moving first and second end effector elements in response to the squeezing of the grip members according to a control relationship; and
altering the control relationship when the grip members are near a closed configuration; and
applying a feedback following force against the grip separation members in response to the separation misalignment. - View Dependent Claims (14)
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15. A method of manipulating a surgical instrument comprising a first and second grip members, the method comprising:
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moving the first and second grip members towards each other;
moving first and second end effector elements in response to the movement of the grip members according to a control relationship; and
altering the control relationship between the end effector elements and grip members when the grip members reach a predetermined separation, wherein altering the control relationship between the end effector elements and grip members comprises changing the one-to-one correspondence. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A method of manipulating a surgical instrument comprising a first and second grip members, the method comprising:
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moving the first and second grip members towards each other;
moving first and second end effector elements in response to the movement of the grip members according to a control relationship; and
altering the control relationship between the end effector elements and grip members when the grip members reach a predetermined separation;
wherein altering the control relationship between the end effector elements and grip comprises applying an altered gripping strength to the end effectors. - View Dependent Claims (23, 24)
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Specification