US20110118779A1 - Surgical Instrument Providing Haptic Feedback - Google Patents
Surgical Instrument Providing Haptic Feedback Download PDFInfo
- Publication number
- US20110118779A1 US20110118779A1 US13/011,880 US201113011880A US2011118779A1 US 20110118779 A1 US20110118779 A1 US 20110118779A1 US 201113011880 A US201113011880 A US 201113011880A US 2011118779 A1 US2011118779 A1 US 2011118779A1
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- United States
- Prior art keywords
- surgical instrument
- actuator
- grip
- grip portion
- user
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/28—Surgical forceps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/70—Manipulators specially adapted for use in surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/70—Manipulators specially adapted for use in surgery
- A61B34/74—Manipulators with manual electric input means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/70—Manipulators specially adapted for use in surgery
- A61B34/76—Manipulators having means for providing feel, e.g. force or tactile feedback
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06G—ANALOGUE COMPUTERS
- G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
- G06G7/48—Analogue computers for specific processes, systems or devices, e.g. simulators
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/28—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for medicine
- G09B23/285—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for medicine for injections, endoscopy, bronchoscopy, sigmoidscopy, insertion of contraceptive devices or enemas
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00017—Electrical control of surgical instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00367—Details of actuation of instruments, e.g. relations between pushing buttons, or the like, and activation of the tool, working tip, or the like
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00367—Details of actuation of instruments, e.g. relations between pushing buttons, or the like, and activation of the tool, working tip, or the like
- A61B2017/00398—Details of actuation of instruments, e.g. relations between pushing buttons, or the like, and activation of the tool, working tip, or the like using powered actuators, e.g. stepper motors, solenoids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
- A61B2090/064—Measuring instruments not otherwise provided for for measuring force, pressure or mechanical tension
Definitions
- the present invention relates to surgical tools for treating tissue, and in particular embodiments hereof relate to a surgical tool in which haptic effects are provided to a handle of the surgical tool.
- a user interfaces with computer devices for a variety of applications.
- One such application is interacting with computer-generated environments, such as virtual reality environments, including surgical simulations, games, actual surgeries and other application program generated environments.
- Computer input devices such as mice and trackballs are often used to control a cursor within a graphical environment and provide input in these applications.
- haptic feedback force feedback and/or tactile feedback is also provided to the user, collectively known herein as “haptic feedback.”
- haptic versions of joysticks, mice, gamepads, steering wheels, or other types of devices may output forces to the user based on events or interactions occurring within the graphical environment, such as in a game or other application program.
- the present invention provides a computer interface for use with a computer simulation system.
- the interface includes a first grip portion and a second grip portion pivotably coupled to the first grip portion.
- An actuator is coupled to at least one of the two grip portions and is configured to provide feedback to a user.
- the actuator is coupled to both the first and second grip portions.
- the actuator comprises a rotary motor.
- the actuator is coupled to the first grip portion and comprises a rotary motor, a rotating shaft that extends into the second grip portion and a cable coupled to the rotating shaft and the second grip portion.
- the computer interface further includes a spring coupled to both the first and second grip portions.
- the computer interface includes at least one sensor for sensing angular rotation of a pivot coupling the first and second grip portions.
- the feedback is at least one of a group comprising pushing the grip portions apart, pulling the grip portions together, vibration, torque and noise.
- the interface comprises a practice tool comprising an elongated portion and a handle.
- the handle includes the first and second grip portions and the actuator is coupled to at least one of the two grip portions.
- a sensor is provided that senses at least one of motion and position of the elongated portion.
- a method of providing feedback within a practice tool during computerized simulation includes providing a practice tool comprising an elongated portion and a handle, the handle comprises a first grip portion at a proximal portion of the elongated portion, a second grip portion at a proximal portion of the elongated portion and pivotably coupled to the first grip portion, and an actuator coupled to at least one of the first and second grip portions. Feedback is provided with the actuator to a user.
- FIG. 1 is a schematic diagram of a computer interface system according to the present invention.
- FIG. 2 is a schematic diagram of a computer interface system according to the present invention comprising an instrument with a pivoting handle.
- FIG. 3 is a schematic diagram of an embodiment of a haptic interface device according to the present invention.
- FIG. 4 is a schematic diagram of another embodiment of a haptic interface device according to the present invention.
- FIG. 5 is a schematic diagram of another embodiment of a haptic interface device according to the present invention.
- FIG. 6 is a schematic diagram of another embodiment of a haptic interface device according to the present invention.
- FIG. 7 is a schematic diagram of another embodiment of a haptic interface device according to the present invention.
- FIG. 8 is a schematic diagram of another embodiment of a haptic interface device according to the present invention.
- FIGS. 9-11 are additional views of the haptic interface device of FIG. 8 .
- FIG. 12 is a schematic side view of an instrument with a sensor and an actuator.
- the present invention relates to computer simulations and more particularly to computer simulations involving the control of a graphical image, such as a graphical image that is a graphical representation of an instrument being manipulated by a user.
- a graphical image such as a graphical image that is a graphical representation of an instrument being manipulated by a user.
- the process is illustrated at least partly in the context of a surgical simulation interface, the present invention may be used in other simulation and computer interactive processes and/or to control other graphical images and should not be limited to the examples provided herein.
- FIG. 1 is a schematic illustration of a computer interface system 100 according to the invention.
- the computer interface system 100 is capable of generating a computer generated or virtual reality environment.
- a display 105 provides a graphical environment 110 to a user.
- a graphical image 115 Within the graphical environment 110 is a graphical image 115 .
- the graphical image 115 may be, for example, a cursor or other graphical object, the position, movement, and/or shape of which is controllable.
- the graphical image 115 may be a pointer cursor, a character in a game, a surgical instrument, a view from the end of a surgical instrument, a representative portion of the user, or the like.
- a graphical object 120 such as a round object, as shown, or any other graphical representation including another graphical image that may be controlled by the user or by another user.
- a controller 125 in communication with the display 105 is capable of generating and/or controlling the graphical environment 110 , for example by executing program code including an application program related to a simulation.
- a user object 130 is manipulatable by a user, and the manipulation of the user object 130 controls the position, orientation, shape and/or other characteristic of the graphical image 115 within the graphical environment 110 , for example by directly correlating a position of the user object 130 with a displayed position and/or shape of the graphical image 115 or by correlating a position of the user object 130 with a rate of movement and/or change of shape of the graphical image 115 .
- Either the entire user object 130 may be manipulatable by the user or a portion of the user object 130 may be manipulatable relative to another portion of the user object 130 .
- the user object may be a surface that is engaged by one or more hands of a user, such as a joystick, a mouse, a mouse housing, a stylus, a knob, an elongated rigid or flexible member, an instrumented glove, or the like and may be moveable in from one to six degrees of freedom.
- a user such as a joystick, a mouse, a mouse housing, a stylus, a knob, an elongated rigid or flexible member, an instrumented glove, or the like and may be moveable in from one to six degrees of freedom.
- haptic feedback may be provided to the user to increase the realism of the virtual reality environment.
- the controller 125 may cause an actuator 135 to output a haptic sensation to the user.
- the actuator 135 outputs the haptic sensation to the user object 130 through which the sensation is provided to the user.
- the actuator 135 and the user object 130 may be part of a haptic interface device 140 .
- the actuator 135 may be positioned in the haptic interface device 140 to apply a force to the user object 130 or to a portion of the user object.
- the actuator 135 may provide the haptic sensation actively or passively.
- the actuator 135 may comprise one or more motors coupled to the user object 130 to apply a force to the user or to the user object 130 in one or more degrees of freedom.
- the actuator 135 may comprise one or more braking mechanisms coupled to the user object to inhibit movement of the user or the user object 130 in one or more degrees of freedom.
- haptic sensation it is meant any sensation provided to the user that is related to the user's sense of touch.
- the haptic sensation may comprise kinesthetic force feedback and/or tactile feedback.
- kinesthetic force feedback it is meant any active or passive force applied to the user to simulate a force that would be experienced in the graphical environment 110 , such as a grounded force applied to the user or the user object 130 to simulate a force experienced by at least a portion of the graphical image 115 .
- the actuator 135 may output a force against the user object 130 preventing or retarding movement of the user or the user object 130 in the direction of the barrier or obstruction.
- tactile feedback it is meant any active or passive force applied to the user to provide the user with a tactile indication of a predetermined occurrence within the graphical environment 110 .
- a vibration, click, pop, or the like may be output to the user when the graphical image 115 interacts with a graphical object 120 .
- tactile feedback may comprise a tactile sensation applied to approximate or give the illusion of a kinesthetic force.
- a kinesthetic force sensation such as a spring force
- a tactile sensation such as a pop
- the controller 125 may be a computer 150 , or the like, such as the computer shown in FIG. 2 .
- the computer 150 may comprise a processor and may be able to execute program code.
- the computer may be a personal computer or workstation, such as a PC compatible computer or Macintosh personal computer, or a Sun or Silicon Graphics workstation.
- the computer 150 may be operable under the WindowsTM, MacOS, Unix, or MS-DOS operating system or similar.
- the computer 150 may be one of a variety of home video game console systems commonly connected to a television set or other display, such as systems available from Nintendo, Sega, or Sony.
- the computer 150 may be a “set top box” which may be used, for example, to provide interactive television functions to users, or a “network-” or “internet-computer” which allows users to interact with a local or global network using standard connections and protocols such as used for the Internet and World Wide Web.
- the computer 150 may include a host microprocessor, random access memory (RAM), read only memory (ROM), input/output (I/O) circuitry, and/or other components of computers well-known to those skilled in the art.
- the computer 150 may implement an application program with which a user is interacting via peripherals, such as haptic interface device 140 and/or user object 130 .
- the application program may be a simulation program, such as a medical procedure simulation program, a game, a computer aided design or other graphic design program, an operating system, a word processor or spreadsheet, a Web page or browser that implements, for example, HTML or VRML instructions, a scientific analysis program, or other application program that may or may not utilize haptic feedback.
- operating systems such as WindowsTM, MS-DOS, MacOS, Linux, Be, etc. are also referred to as “application programs.”
- the application program may comprise an interactive graphical environment, such as a graphical user interface (GUI) to allow the user to input information to the program.
- GUI graphical user interface
- the application provides images to be displayed on a display screen 155 and/or outputs other feedback, such as auditory signals.
- the computer 150 is capable of generating a graphical environment 110 , which may be a graphical user interface, game, simulation, such as those described above, or other visual environment.
- the computer 150 displays graphical objects 120 , such as graphical representations and graphical images, or “computer objects,” which are not physical objects, but are logical software unit collections of data and/or procedures that may be displayed as images by the computer on display screen 155 , as is well known to those skilled in the art.
- the application program checks for input signals received from the electronics and sensors of the user object 130 , and outputs force values and/or commands to be converted into haptic output for the actuator 135 . Suitable software drivers which interface such simulation software with computer input/output (I/O) devices are available from Immersion Corporation of San Jose, Calif.
- Display screen 155 may be included in the computer and may be a standard display screen (LCD, CRT, flat panel, etc.), 3-D goggles, or any other visual output device.
- the user object 130 comprises a handle of at least a portion of a real or mock instrument 160 , such as a surgical instrument used in laparoscopic surgery.
- the instrument 160 comprises a handle having a first grip 165 and a second grip 170 .
- the first grip 165 and the second grip 170 are relatively pivotable about a pivot 175 .
- Manipulation of the handle may be detected by one or more sensors in, on, or in communication with the user object 130 .
- a signal indicative of the detected manipulation is provided to the computer 150 , optionally through sensor interface 180 , to control the position, orientation, and/or shape of the graphical image 115 .
- the sensors may detect the motion or position of an elongated portion 185 of the instrument 160 in from one to six or more degrees of freedom to control the displayed position of the graphical image 115 , as disclosed in U.S. Pat. Nos. 5,623,582; 5,821,920; 5,731,804; and 5,828,197 each of which is incorporated herein by reference in its entirety.
- one or more sensors may be positioned to detect manipulation of the first grip 165 relative to the second grip 170 , for example by sensing the amount of rotation about pivot 175 . The sensed pivoting may then be used to control the shape of the displayed graphical image 115 .
- pivoting the first grip 165 relative to the second grip 170 may result in an opening or closing of jaws 190 on the distal end of the graphical image 115 .
- a user may be able to manipulate the instrument 160 to cause the graphical image 115 to grasp or otherwise engage the graphical object 120 .
- a user contacts the instrument 160 to interact with the graphical environment 110 .
- the user grasps the handle including the first grip 165 and the second grip 170 and manipulates the instrument 160 by causing rotation of the grips and optionally by manipulating the instrument 160 in additional degrees of freedom.
- the user may cause the instrument 160 to move to his or her left and downwardly to cause the graphical image 115 to be rendered so as to appear to touch the graphical object 120 .
- the user may rotate the grips to make the graphical jaws 190 appear to grasp the graphical object 120 .
- the realism of the graphical environment interaction may be increased by providing an actuator 135 adapted to provide one or more haptic sensations to the user during the user's interaction with the graphical environment 110 .
- the actuator may either provide the haptic sensation directly to the user or may apply the haptic sensation to the user through the user object, for example by applying a force to the user through the instrument 160 . This allows the user to not only visualize the graphical image 115 contacting the graphical object 120 , but also to receive an indication through the user's sense of touch that the object has been contacted, thereby providing a more immersive experience.
- the actuator 135 may be positioned to provide a haptic sensation to the first grip 165 and/or to the second grip 170 to simulate gripping forces associated with the relative rotation of the grips. It has been discovered that by providing a haptic sensation to the user simulating the griping forces, the user's perception of realistic interaction with a graphical object 120 is enhanced. For example, a haptic sensation may be provided to the grips in coordination with the graphical jaws 190 grasping the graphical object 120 to simulate an actual grasping of an object. Accordingly, in the version of FIG. 2 , the computer 150 controls the output of a haptic sensation to the instrument 160 by providing a signal, optionally though actuator interface 195 , to cause the palm forcing mechanism to be actuated.
- a version of a haptic interface 140 is shown in FIG. 3 .
- One or more angle sensors 200 may be positioned to detect the angular rotation about the pivot 175 .
- a single digital or analog sensor detects either an open condition or a closed condition of the grips, and the computer 150 correspondingly displays the graphical jaws 190 either as being open or as being closed or grasping an object in the graphical environment 110 .
- the angle sensor 200 may comprise a sensor that provides a variable signal by which the display of the graphical jaws 190 may be controlled.
- the joint angle sensor may comprise one or more of an optical, electrical, or magnetic encoder, a strain gage, a fiber optic sensor, a potentiometer, or the like.
- the actuator 135 may be positioned to force apart and/or to bring together the first grip 165 and the second grip 170 .
- FIG. 4 An ungrounded version of a haptic interface 140 is shown in FIG. 4 .
- the actuator 135 is housed in or on the second grip 170 .
- the actuator is capable of actuating the first grip 165 toward or away from the second grip 170 .
- the instrument 160 need not be grounded in order to provide haptic sensations related to rotation of the grips.
- the actuator 135 may comprise a rotary motor 135 a , as shown for example in the version of FIG. 5 .
- the first grip 165 comprises an extension 205 and the second grip 170 comprises an extension 215 .
- the extensions 205 , 215 overlap one another as shown in FIG. 5 .
- the extension 215 of the second grip 170 includes a recessed portion 220 which receives the rotary motor actuator 135 a and which grounds the motor 135 a to the second grip 170 .
- the motor 135 a is capable of rotating a shaft 225 extending therefrom.
- the shaft 225 extends into a recessed portion 210 in the first grip extension 205 .
- a cable 230 is fixed to the first grip 165 , for example, by being fixed to the wall of the recessed portion 210 of the extension 205 .
- the other end of the cable 230 is fixed to the rotatable shaft 225 , for example by being fixed within a through bore 235 in the shaft 225 .
- Rotation of the shaft 225 in the direction of the arrow causes the cable 230 to wrap around the shaft 225 and pulls the first grip 165 toward the second grip 170 .
- actuation of the motor 135 a may cause a grasping force to be applied to the instrument 160 .
- This grasping force may be a haptic sensation related to interactions in the graphical environment.
- the grasping force may be used to augment, amplify or reduce the force the user is applying to the interface device 165 .
- a spring 240 which biases the grips toward an open position may be used to counteract the grasping force generated by the actuator 135 a.
- the rotary motor actuator 135 a may be used to generate a force opposing the closing of the grips, as shown in FIG. 6 .
- the cable 230 is fixed to the opposite side of the recess 210 in the extension 205 of the first grip 165 .
- This generated force may also be used for haptic sensations.
- the applied force may be used to augment, amplify or reduce the force applied by the user, as discussed above.
- the spring 240 is optionally provided to bias the grips towards one another.
- FIG. 7 Another version of the haptic interface 140 is shown in FIG. 7 .
- the rotary motor actuator 135 a and rotatable shaft 225 are able to actively apply either a closing or an opening force to the grips.
- the rotatable shaft 225 is used as a capstan-type device.
- One end of the cable 230 is fixed to one side of the recess 210 and the other end of the cable 230 is fixed to the other side of the recess 210 .
- the cable is wrapped around the rotatable shaft 225 and extends through the through bore 235 .
- rotation of the rotatable shaft 225 in one direction causes an opening force to be applied to the grips and rotation in the other direction causes a closing force to be applied to the grips.
- FIG. 8 shows a version similar to the version of FIG. 7 but with a tapered rotatable shaft 225 .
- the tapered rotatable shaft 225 allows for a greater range of motion between the grips.
- the taper allows the uptake of the amount of cable on the shaft to be substantially the same as the amount of cable discharged from the shaft throughout the range of travel of the shaft within the recess 210 . In this way, the amount of slack in the cable is reduced which reduces backlash and which maintains tight contact of the cable on the shaft.
- the tapered shaft 225 is conically shaped.
- the sides of the conically shaped shaft 225 are shaped such that an extension thereof would result in the sides intersecting substantially at the pivot 175 .
- the shaft may be stepped.
- FIGS. 9 and 10 show top and side perspective views of the haptic interface device 140 of FIG. 8 .
- FIG. 11 shows the haptic interface device 140 of FIG. 8 with a cover 250 covering the motor 135 a.
- FIG. 12 shows a version in which an actual surgical instrument 160 is the user object 130 and haptic interface device 140 .
- the surgical instrument 160 which is a laparoscopic instrument in the version shown, may include a distal end 191 that is controllable by manipulation of a handle 161 .
- the distal end 191 may comprise opposing jaws 190 a that may be opened and closed by opening and closing the first and second grips 165 , 170 of the handle 161 .
- the surgical instrument handle 161 may also comprise an actuator 135 , such as one of the actuating mechanisms discussed above, for forcing the first and second grips 165 , 170 open or closed.
- the actuator 135 may be used to assist the user in applying forces or may be used to reduce the force a user applies to the first and second grips 165 , 170 .
- actuator 135 is capable of moving first grip 165 toward or away from second grip 170 .
- the haptic effects provided by actuator 135 includes a force about pivot point 175 that moves first grip 165 towards second grip 170 into a closed position in order to assist the user in applying forces to the first and second grips and/or moves first grip 165 away or apart from second grip 170 into an open position in order to reduce the force a user applies to the first and second grips.
- actuator 135 may be used to apply a haptic sensation or effect to the user which is feedback relating to a sensed condition.
- a sensor 260 may be provided to detect a condition at the distal end 191 of the surgical instrument 160 .
- a pressure or force sensor 260 may be positioned to detect the pressure or forces applied to one or more of the jaws 190 a .
- the sensed condition may be provided to the controller 125 which may be a separate controller or may be a controller or logic on the surgical instrument. The controller 125 may then control the operation of the actuator 135 in relation to the sensed condition.
- the senor 260 may be sufficiently sensitive to detect a predetermined interaction, and the controller 125 may cause a haptic response to be applied to the user to indicate the interaction. Additional interactions are discussed in U.S. Pat. No. 6,817,973 to Merril et al., which is incorporated by reference herein in its entirety.
- the simulation may comprise surgical applications other than laparoscopic procedures.
- the interface device may be used for non-surgical simulations.
- an application program may be responsive to a shear interface and may comprise instructional program code on how to correctly prune a rose bush or a game environment may use pivotal grip haptic feedback.
- the forcing mechanisms disclosed may be used to apply forces to relatively pivoting parts in any environment.
Abstract
A surgical instrument is disclosed having a distal end connected to a handle via an elongated mechanical linkage. The handle includes a first grip portion and a second grip portion pivotably coupled such that the distal end is controllable by manipulation of the handle. At least one sensor is coupled to the distal end of the surgical instrument, wherein the sensor detects a condition at the distal end. An actuator is coupled to one of the first and second grip portions is configured to provide haptic effects to the one of the first and second grip portions. A controller is electrically coupled to the sensor and electrically coupled to the actuator, wherein the controller controls operation of the actuator such that the haptic effects are feedback relating to the sensed condition.
Description
- This application is a continuation of U.S. application Ser. No. 10/196,717, filed Jul. 15, 2002, now U.S. Pat. No. 7,877,243, which claims the benefit of U.S. Provisional Patent Application Ser. No. 60/305,958, filed Jul. 16, 2001, each of which is hereby incorporated by reference in its entirety for all purposes.
- The present invention relates to surgical tools for treating tissue, and in particular embodiments hereof relate to a surgical tool in which haptic effects are provided to a handle of the surgical tool.
- Users interface with electronic and mechanical devices in a variety of applications, and the need for a more natural, easy-to-use, and informative interface is a constant concern. In the context of the present invention, a user interfaces with computer devices for a variety of applications. One such application is interacting with computer-generated environments, such as virtual reality environments, including surgical simulations, games, actual surgeries and other application program generated environments. Computer input devices such as mice and trackballs are often used to control a cursor within a graphical environment and provide input in these applications.
- In some interface devices, force feedback and/or tactile feedback is also provided to the user, collectively known herein as “haptic feedback.” For example, haptic versions of joysticks, mice, gamepads, steering wheels, or other types of devices may output forces to the user based on events or interactions occurring within the graphical environment, such as in a game or other application program. In a computer simulation, it is often desirable to graphically represent a user or a portion of the user in the graphical environment and to allow the user to realistically interact with the graphical environment.
- The present invention provides a computer interface for use with a computer simulation system. The interface includes a first grip portion and a second grip portion pivotably coupled to the first grip portion. An actuator is coupled to at least one of the two grip portions and is configured to provide feedback to a user.
- In accordance with one aspect of the present invention, the actuator is coupled to both the first and second grip portions.
- In accordance with another aspect of the present invention, the actuator comprises a rotary motor.
- In accordance with a further aspect of the present invention, the actuator is coupled to the first grip portion and comprises a rotary motor, a rotating shaft that extends into the second grip portion and a cable coupled to the rotating shaft and the second grip portion.
- In accordance with another aspect of the present invention, the computer interface further includes a spring coupled to both the first and second grip portions.
- In accordance with a further aspect of the present invention, the computer interface includes at least one sensor for sensing angular rotation of a pivot coupling the first and second grip portions.
- In accordance with yet a further aspect of the present invention, the feedback is at least one of a group comprising pushing the grip portions apart, pulling the grip portions together, vibration, torque and noise.
- In accordance with another aspect of the present invention, the interface comprises a practice tool comprising an elongated portion and a handle. The handle includes the first and second grip portions and the actuator is coupled to at least one of the two grip portions.
- In accordance with another aspect of the present invention, a sensor is provided that senses at least one of motion and position of the elongated portion.
- In accordance with another aspect of the present invention, a method of providing feedback within a practice tool during computerized simulation includes providing a practice tool comprising an elongated portion and a handle, the handle comprises a first grip portion at a proximal portion of the elongated portion, a second grip portion at a proximal portion of the elongated portion and pivotably coupled to the first grip portion, and an actuator coupled to at least one of the first and second grip portions. Feedback is provided with the actuator to a user.
- Other features and advantages of the present invention will be understood upon reading and understanding the description of the preferred exemplary embodiments, found herein below, in conjunction with reference to the drawings, in which like numerals represent like elements.
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FIG. 1 is a schematic diagram of a computer interface system according to the present invention. -
FIG. 2 is a schematic diagram of a computer interface system according to the present invention comprising an instrument with a pivoting handle. -
FIG. 3 is a schematic diagram of an embodiment of a haptic interface device according to the present invention. -
FIG. 4 is a schematic diagram of another embodiment of a haptic interface device according to the present invention. -
FIG. 5 is a schematic diagram of another embodiment of a haptic interface device according to the present invention. -
FIG. 6 is a schematic diagram of another embodiment of a haptic interface device according to the present invention. -
FIG. 7 is a schematic diagram of another embodiment of a haptic interface device according to the present invention. -
FIG. 8 is a schematic diagram of another embodiment of a haptic interface device according to the present invention. -
FIGS. 9-11 are additional views of the haptic interface device ofFIG. 8 . -
FIG. 12 is a schematic side view of an instrument with a sensor and an actuator. - The present invention relates to computer simulations and more particularly to computer simulations involving the control of a graphical image, such as a graphical image that is a graphical representation of an instrument being manipulated by a user. Although the process is illustrated at least partly in the context of a surgical simulation interface, the present invention may be used in other simulation and computer interactive processes and/or to control other graphical images and should not be limited to the examples provided herein.
-
FIG. 1 is a schematic illustration of acomputer interface system 100 according to the invention. Thecomputer interface system 100 is capable of generating a computer generated or virtual reality environment. Adisplay 105 provides agraphical environment 110 to a user. Within thegraphical environment 110 is agraphical image 115. Thegraphical image 115 may be, for example, a cursor or other graphical object, the position, movement, and/or shape of which is controllable. For example, thegraphical image 115 may be a pointer cursor, a character in a game, a surgical instrument, a view from the end of a surgical instrument, a representative portion of the user, or the like. Also within the graphical environment is agraphical object 120 such as a round object, as shown, or any other graphical representation including another graphical image that may be controlled by the user or by another user. Acontroller 125 in communication with thedisplay 105 is capable of generating and/or controlling thegraphical environment 110, for example by executing program code including an application program related to a simulation. Auser object 130 is manipulatable by a user, and the manipulation of theuser object 130 controls the position, orientation, shape and/or other characteristic of thegraphical image 115 within thegraphical environment 110, for example by directly correlating a position of theuser object 130 with a displayed position and/or shape of thegraphical image 115 or by correlating a position of theuser object 130 with a rate of movement and/or change of shape of thegraphical image 115. Either theentire user object 130 may be manipulatable by the user or a portion of theuser object 130 may be manipulatable relative to another portion of theuser object 130. For example, the user object may be a surface that is engaged by one or more hands of a user, such as a joystick, a mouse, a mouse housing, a stylus, a knob, an elongated rigid or flexible member, an instrumented glove, or the like and may be moveable in from one to six degrees of freedom. - Optionally, haptic feedback may be provided to the user to increase the realism of the virtual reality environment. For example, when a predetermined event occurs within the
graphical environment 110, such as an interaction of thegraphical image 115 with thegraphical object 120, thecontroller 125 may cause anactuator 135 to output a haptic sensation to the user. In the version shown, theactuator 135 outputs the haptic sensation to theuser object 130 through which the sensation is provided to the user. Theactuator 135 and theuser object 130 may be part of ahaptic interface device 140. Theactuator 135 may be positioned in thehaptic interface device 140 to apply a force to theuser object 130 or to a portion of the user object. - The
actuator 135 may provide the haptic sensation actively or passively. For example, theactuator 135 may comprise one or more motors coupled to theuser object 130 to apply a force to the user or to theuser object 130 in one or more degrees of freedom. Alternatively or additionally, theactuator 135 may comprise one or more braking mechanisms coupled to the user object to inhibit movement of the user or theuser object 130 in one or more degrees of freedom. By haptic sensation it is meant any sensation provided to the user that is related to the user's sense of touch. For example, the haptic sensation may comprise kinesthetic force feedback and/or tactile feedback. By kinesthetic force feedback it is meant any active or passive force applied to the user to simulate a force that would be experienced in thegraphical environment 110, such as a grounded force applied to the user or theuser object 130 to simulate a force experienced by at least a portion of thegraphical image 115. For example, if thegraphical image 115 is positioned against a surface, a barrier or an obstruction, theactuator 135 may output a force against theuser object 130 preventing or retarding movement of the user or theuser object 130 in the direction of the barrier or obstruction. By tactile feedback it is meant any active or passive force applied to the user to provide the user with a tactile indication of a predetermined occurrence within thegraphical environment 110. For example, a vibration, click, pop, or the like may be output to the user when thegraphical image 115 interacts with agraphical object 120. Additionally, tactile feedback may comprise a tactile sensation applied to approximate or give the illusion of a kinesthetic force. For example, by varying the frequency and/or the amplitude of an applied vibration, variations in surface textures of different graphical objects may be simulated or by providing a series of clicks when a graphical image penetrates an object, resistance to the penetration may be simulated. For example, in one version a kinesthetic force sensation, such as a spring force, may be applied to the user whenever thegraphical image 115 engages thegraphical object 120 to simulate a selectively deformable surface. Alternatively or additionally, a tactile sensation, such as a pop, may be applied to the user when thegraphical image 115 is moved across a surface of thegraphical object 120 to simulate a texture of thegraphical object 120. - The
controller 125 may be acomputer 150, or the like, such as the computer shown inFIG. 2 . In one version, thecomputer 150 may comprise a processor and may be able to execute program code. For example, the computer may be a personal computer or workstation, such as a PC compatible computer or Macintosh personal computer, or a Sun or Silicon Graphics workstation. Thecomputer 150 may be operable under the Windows™, MacOS, Unix, or MS-DOS operating system or similar. Alternatively, thecomputer 150 may be one of a variety of home video game console systems commonly connected to a television set or other display, such as systems available from Nintendo, Sega, or Sony. In other embodiments, thecomputer 150 may be a “set top box” which may be used, for example, to provide interactive television functions to users, or a “network-” or “internet-computer” which allows users to interact with a local or global network using standard connections and protocols such as used for the Internet and World Wide Web. Thecomputer 150 may include a host microprocessor, random access memory (RAM), read only memory (ROM), input/output (I/O) circuitry, and/or other components of computers well-known to those skilled in the art. Thecomputer 150 may implement an application program with which a user is interacting via peripherals, such ashaptic interface device 140 and/oruser object 130. For example, the application program may be a simulation program, such as a medical procedure simulation program, a game, a computer aided design or other graphic design program, an operating system, a word processor or spreadsheet, a Web page or browser that implements, for example, HTML or VRML instructions, a scientific analysis program, or other application program that may or may not utilize haptic feedback. Herein, for simplicity, operating systems such as Windows™, MS-DOS, MacOS, Linux, Be, etc. are also referred to as “application programs.” The application program may comprise an interactive graphical environment, such as a graphical user interface (GUI) to allow the user to input information to the program. Typically, the application provides images to be displayed on adisplay screen 155 and/or outputs other feedback, such as auditory signals. Thecomputer 150 is capable of generating agraphical environment 110, which may be a graphical user interface, game, simulation, such as those described above, or other visual environment. Thecomputer 150 displaysgraphical objects 120, such as graphical representations and graphical images, or “computer objects,” which are not physical objects, but are logical software unit collections of data and/or procedures that may be displayed as images by the computer ondisplay screen 155, as is well known to those skilled in the art. The application program checks for input signals received from the electronics and sensors of theuser object 130, and outputs force values and/or commands to be converted into haptic output for theactuator 135. Suitable software drivers which interface such simulation software with computer input/output (I/O) devices are available from Immersion Corporation of San Jose, Calif.Display screen 155 may be included in the computer and may be a standard display screen (LCD, CRT, flat panel, etc.), 3-D goggles, or any other visual output device. - In one version of the
computer interface system 100, theuser object 130 comprises a handle of at least a portion of a real ormock instrument 160, such as a surgical instrument used in laparoscopic surgery. In the version shown inFIG. 2 , theinstrument 160 comprises a handle having afirst grip 165 and asecond grip 170. Thefirst grip 165 and thesecond grip 170 are relatively pivotable about apivot 175. Manipulation of the handle may be detected by one or more sensors in, on, or in communication with theuser object 130. A signal indicative of the detected manipulation is provided to thecomputer 150, optionally throughsensor interface 180, to control the position, orientation, and/or shape of thegraphical image 115. For example, the sensors may detect the motion or position of anelongated portion 185 of theinstrument 160 in from one to six or more degrees of freedom to control the displayed position of thegraphical image 115, as disclosed in U.S. Pat. Nos. 5,623,582; 5,821,920; 5,731,804; and 5,828,197 each of which is incorporated herein by reference in its entirety. Alternatively or additionally, one or more sensors may be positioned to detect manipulation of thefirst grip 165 relative to thesecond grip 170, for example by sensing the amount of rotation aboutpivot 175. The sensed pivoting may then be used to control the shape of the displayedgraphical image 115. For example, in the version shown, pivoting thefirst grip 165 relative to thesecond grip 170 may result in an opening or closing ofjaws 190 on the distal end of thegraphical image 115. In this way, a user may be able to manipulate theinstrument 160 to cause thegraphical image 115 to grasp or otherwise engage thegraphical object 120. - In use, a user contacts the
instrument 160 to interact with thegraphical environment 110. In the version shown inFIG. 2 , the user grasps the handle including thefirst grip 165 and thesecond grip 170 and manipulates theinstrument 160 by causing rotation of the grips and optionally by manipulating theinstrument 160 in additional degrees of freedom. For example, the user may cause theinstrument 160 to move to his or her left and downwardly to cause thegraphical image 115 to be rendered so as to appear to touch thegraphical object 120. In addition, the user may rotate the grips to make thegraphical jaws 190 appear to grasp thegraphical object 120. - The realism of the graphical environment interaction may be increased by providing an
actuator 135 adapted to provide one or more haptic sensations to the user during the user's interaction with thegraphical environment 110. The actuator may either provide the haptic sensation directly to the user or may apply the haptic sensation to the user through the user object, for example by applying a force to the user through theinstrument 160. This allows the user to not only visualize thegraphical image 115 contacting thegraphical object 120, but also to receive an indication through the user's sense of touch that the object has been contacted, thereby providing a more immersive experience. In one version, theactuator 135 may be positioned to provide a haptic sensation to thefirst grip 165 and/or to thesecond grip 170 to simulate gripping forces associated with the relative rotation of the grips. It has been discovered that by providing a haptic sensation to the user simulating the griping forces, the user's perception of realistic interaction with agraphical object 120 is enhanced. For example, a haptic sensation may be provided to the grips in coordination with thegraphical jaws 190 grasping thegraphical object 120 to simulate an actual grasping of an object. Accordingly, in the version ofFIG. 2 , thecomputer 150 controls the output of a haptic sensation to theinstrument 160 by providing a signal, optionally thoughactuator interface 195, to cause the palm forcing mechanism to be actuated. - A version of a
haptic interface 140 is shown inFIG. 3 . One ormore angle sensors 200 may be positioned to detect the angular rotation about thepivot 175. In a relatively simple version, a single digital or analog sensor detects either an open condition or a closed condition of the grips, and thecomputer 150 correspondingly displays thegraphical jaws 190 either as being open or as being closed or grasping an object in thegraphical environment 110. In another version, theangle sensor 200 may comprise a sensor that provides a variable signal by which the display of thegraphical jaws 190 may be controlled. The joint angle sensor may comprise one or more of an optical, electrical, or magnetic encoder, a strain gage, a fiber optic sensor, a potentiometer, or the like. Theactuator 135 may be positioned to force apart and/or to bring together thefirst grip 165 and thesecond grip 170. - An ungrounded version of a
haptic interface 140 is shown inFIG. 4 . In this version, theactuator 135 is housed in or on thesecond grip 170. The actuator is capable of actuating thefirst grip 165 toward or away from thesecond grip 170. With this version, theinstrument 160 need not be grounded in order to provide haptic sensations related to rotation of the grips. - The
actuator 135 may comprise a rotary motor 135 a, as shown for example in the version ofFIG. 5 . In this version, thefirst grip 165 comprises anextension 205 and thesecond grip 170 comprises anextension 215. Theextensions FIG. 5 . Theextension 215 of thesecond grip 170 includes a recessedportion 220 which receives the rotary motor actuator 135 a and which grounds the motor 135 a to thesecond grip 170. The motor 135 a is capable of rotating ashaft 225 extending therefrom. Theshaft 225 extends into a recessedportion 210 in thefirst grip extension 205. Acable 230 is fixed to thefirst grip 165, for example, by being fixed to the wall of the recessedportion 210 of theextension 205. The other end of thecable 230 is fixed to therotatable shaft 225, for example by being fixed within a throughbore 235 in theshaft 225. Rotation of theshaft 225 in the direction of the arrow causes thecable 230 to wrap around theshaft 225 and pulls thefirst grip 165 toward thesecond grip 170. Accordingly, actuation of the motor 135 a may cause a grasping force to be applied to theinstrument 160. This grasping force may be a haptic sensation related to interactions in the graphical environment. Additionally or alternatively, the grasping force may be used to augment, amplify or reduce the force the user is applying to theinterface device 165. Optionally, aspring 240 which biases the grips toward an open position may be used to counteract the grasping force generated by the actuator 135 a. - Alternatively, the rotary motor actuator 135 a may be used to generate a force opposing the closing of the grips, as shown in
FIG. 6 . In the version ofFIG. 6 , thecable 230 is fixed to the opposite side of therecess 210 in theextension 205 of thefirst grip 165. Thus, as theshaft 225 is rotated in the direction of the arrow inFIG. 6 , thefirst grip 165 and thesecond grip 170 are forced apart. This generated force may also be used for haptic sensations. For example, when thegraphical jaws 190 contact the graphical object 120 a force may be output to the user preventing or inhibiting the closing of the grips in relation to the displayed activity. Alternatively or additionally, the applied force may be used to augment, amplify or reduce the force applied by the user, as discussed above. In the version of theFIG. 6 , thespring 240 is optionally provided to bias the grips towards one another. - Another version of the
haptic interface 140 is shown inFIG. 7 . In this version, the rotary motor actuator 135 a androtatable shaft 225 are able to actively apply either a closing or an opening force to the grips. In the version ofFIG. 7 , therotatable shaft 225 is used as a capstan-type device. One end of thecable 230 is fixed to one side of therecess 210 and the other end of thecable 230 is fixed to the other side of therecess 210. The cable is wrapped around therotatable shaft 225 and extends through the throughbore 235. Thus, rotation of therotatable shaft 225 in one direction causes an opening force to be applied to the grips and rotation in the other direction causes a closing force to be applied to the grips. -
FIG. 8 shows a version similar to the version ofFIG. 7 but with a taperedrotatable shaft 225. The taperedrotatable shaft 225 allows for a greater range of motion between the grips. The taper allows the uptake of the amount of cable on the shaft to be substantially the same as the amount of cable discharged from the shaft throughout the range of travel of the shaft within therecess 210. In this way, the amount of slack in the cable is reduced which reduces backlash and which maintains tight contact of the cable on the shaft. In one version, the taperedshaft 225 is conically shaped. In a particularly useful version, the sides of the conically shapedshaft 225 are shaped such that an extension thereof would result in the sides intersecting substantially at thepivot 175. In another version, the shaft may be stepped. -
FIGS. 9 and 10 show top and side perspective views of thehaptic interface device 140 ofFIG. 8 .FIG. 11 shows thehaptic interface device 140 ofFIG. 8 with acover 250 covering the motor 135 a. -
FIG. 12 shows a version in which an actualsurgical instrument 160 is theuser object 130 andhaptic interface device 140. Thesurgical instrument 160, which is a laparoscopic instrument in the version shown, may include adistal end 191 that is controllable by manipulation of ahandle 161. For example, thedistal end 191 may comprise opposing jaws 190 a that may be opened and closed by opening and closing the first andsecond grips handle 161. The surgical instrument handle 161 may also comprise anactuator 135, such as one of the actuating mechanisms discussed above, for forcing the first andsecond grips actuator 135 may be used to assist the user in applying forces or may be used to reduce the force a user applies to the first andsecond grips actuator 135 is capable of movingfirst grip 165 toward or away fromsecond grip 170. More particularly, the haptic effects provided byactuator 135 includes a force aboutpivot point 175 that movesfirst grip 165 towardssecond grip 170 into a closed position in order to assist the user in applying forces to the first and second grips and/or movesfirst grip 165 away or apart fromsecond grip 170 into an open position in order to reduce the force a user applies to the first and second grips. In another embodiment hereof,actuator 135 may be used to apply a haptic sensation or effect to the user which is feedback relating to a sensed condition. More particularly, a sensor 260 may be provided to detect a condition at thedistal end 191 of thesurgical instrument 160. For example, a pressure or force sensor 260 may be positioned to detect the pressure or forces applied to one or more of the jaws 190 a. The sensed condition may be provided to thecontroller 125 which may be a separate controller or may be a controller or logic on the surgical instrument. Thecontroller 125 may then control the operation of theactuator 135 in relation to the sensed condition. For example, often elongated portion ormechanical linkage 185 ofsurgical instrument 160 is insufficient to communicate to the user that the jaws 190 a have interacted with an object. Thus, the sensor 260 may be sufficiently sensitive to detect a predetermined interaction, and thecontroller 125 may cause a haptic response to be applied to the user to indicate the interaction. Additional interactions are discussed in U.S. Pat. No. 6,817,973 to Merril et al., which is incorporated by reference herein in its entirety. - While this invention has been described in terms of several preferred embodiments, it is contemplated that alterations, permutations and equivalents thereof will become apparent to those skilled in the art upon a reading of the specification and study of the drawings. For example, when used with a simulation system, laparoscopic techniques other than those discussed above may be simulated. For example, other techniques are disclosed in the following U.S. patents, all of which are incorporated herein by reference in their entireties: U.S. Pat. Nos. 5,735,874; 5,514,156; 5,163,945; 5,980,510; 5,632,432; 6,168,605; 5,258,004; 5,307,976; 5,447,513; 5,681,324; 6,090,120; and 5,846,254. Additionally, the simulation may comprise surgical applications other than laparoscopic procedures. Furthermore, the interface device may be used for non-surgical simulations. For example, an application program may be responsive to a shear interface and may comprise instructional program code on how to correctly prune a rose bush or a game environment may use pivotal grip haptic feedback. Additionally, the forcing mechanisms disclosed may be used to apply forces to relatively pivoting parts in any environment.
Claims (21)
1-20. (canceled)
21. A surgical instrument comprising:
a handle having a first grip portion and a second grip portion pivotably coupled to the first grip portion at a pivot point;
a distal end connected to the handle via an elongated mechanical linkage, wherein the distal end is controllable by manipulation of the handle; and
an actuator coupled to one of the first and second grip portions and configured to provide haptic effects to a user, wherein the haptic effects includes a force about the pivot point applied to the one of the first and second grip portions.
22. The surgical instrument of claim 21 , further comprising:
at least one sensor coupled to the distal end, wherein the sensor detects a condition at the distal end; and
a controller electrically coupled to the sensor and electrically coupled to the actuator, wherein the controller controls operation of the actuator such that the haptic effects are feedback relating to the sensed condition.
23. The surgical instrument of claim 22 , wherein the sensor is one of a force sensor and a pressure sensor attached to the opposing jaws to detect forces or pressures applied thereto.
24. The surgical instrument of claim 22 , wherein the haptic effects includes at least one of kinesthetic or vibrotactile feedback.
25. The surgical instrument of claim 21 , wherein the distal end includes opposing jaws that may be opened and closed by manipulation of the handle.
26. The surgical instrument of claim 21 , wherein the force about the pivot point moves the first grip portion and the second grip portion apart into an open position in order to reduce the force a user applies to the first and second grip portions.
27. The surgical instrument of claim 21 , wherein the force about the pivot point moves the first grip portion and the second grip portion together into a closed position in order to assist a user in applying forces to the first and second grip portions.
28. The surgical instrument of claim 21 , wherein the actuator is coupled to both the first and second grip portions.
29. The surgical instrument of claim 28 , wherein the actuator comprises a rotary motor.
30. The surgical instrument of claim 21 , wherein the actuator comprises a braking mechanism.
31. A surgical instrument comprising:
a distal end connected to a handle via an elongated mechanical linkage, wherein the handle includes a first grip portion and a second grip portion pivotably coupled to the first grip portion and the distal end is controllable by manipulation of the handle;
at least one sensor coupled to the distal end, wherein the sensor detects a condition at the distal end;
an actuator coupled to one of the first and second grip portions and configured to provide haptic effects to the one of the first and second grip portions; and
a controller electrically coupled to the sensor and electrically coupled to the actuator, wherein the controller controls operation of the actuator such that the haptic effects are feedback relating to the sensed condition.
32. The surgical instrument of claim 31 , wherein the sensor is one of a force sensor and a pressure sensor attached to the opposing jaws to detect forces or pressures applied thereto.
33. The surgical instrument of claim 31 , wherein the haptic effects includes at least one of kinesthetic or vibrotactile feedback.
34. The surgical instrument of claim 31 , wherein the distal end includes opposing jaws that may be opened and closed by manipulation of the handle.
35. The surgical instrument of claim 31 , wherein the actuator is coupled to both the first and second grip portions.
36. The surgical instrument of claim 31 , wherein the actuator comprises a rotary motor.
37. The surgical instrument of claim 31 , wherein the actuator comprises a braking mechanism.
38. The surgical instrument of claim 31 , wherein the controller is located on the surgical instrument.
39. The surgical instrument of claim 31 , wherein the actuator is configured to apply a force about a pivot point that moves the first grip portion and the second grip portion apart into an open position.
40. The surgical instrument of claim 31 , wherein the actuator is configured to apply a force about a pivot point that moves the first grip portion and the second grip portion together into a closed position.
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Also Published As
Publication number | Publication date |
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EP1407417B1 (en) | 2016-12-21 |
EP2457534A1 (en) | 2012-05-30 |
EP1407417A1 (en) | 2004-04-14 |
US20030025723A1 (en) | 2003-02-06 |
JP4799818B2 (en) | 2011-10-26 |
US7877243B2 (en) | 2011-01-25 |
WO2003009212A1 (en) | 2003-01-30 |
KR20090049098A (en) | 2009-05-15 |
KR101100983B1 (en) | 2011-12-29 |
JP5662256B2 (en) | 2015-01-28 |
KR20040022452A (en) | 2004-03-12 |
JP2004536409A (en) | 2004-12-02 |
CN100342384C (en) | 2007-10-10 |
KR101173824B1 (en) | 2012-08-16 |
JP2011181111A (en) | 2011-09-15 |
EP1407417A4 (en) | 2009-05-20 |
CN1531704A (en) | 2004-09-22 |
KR20110071030A (en) | 2011-06-27 |
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