THERAPEUTIC DEVICE SYSTEM AND MANIPULATOR SYSTEM

• US 20090143642A1
• Filed: 10/28/2008
• Published: 06/04/2009
• Est. Priority Date: 11/29/2007
• Status: Abandoned Application

• Current Assignee: Olympus Medical Systems Corporation (Olympus Corporation)
• Original Assignee: Olympus Medical Systems Corporation (Olympus Corporation)
• Inventors: Takahashi, Kazuhiko, Nakamura, Toshio
• Application Number:
  US12/259,660
• Publication Number:
  US 20090143642A1
• Time in Patent Office: Days
• US Class Current: 600/106
• CPC Class Codes: A61B 1/00133 Drive units for endoscopic tools inserted through or with the endoscope
• CPC Class Codes: A61B 1/00147 Holding or positioning arrangements
• CPC Class Codes: A61B 1/0055 Constructional details of insertion parts, e.g. vertebral elements
• CPC Class Codes: A61B 1/0057 Constructional details of force transmission elements, e.g. control wires
• CPC Class Codes: A61B 1/009 with bending or curvature detection of the insertion part
• CPC Class Codes: A61B 1/018 for receiving instruments
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 2017/00292 mounted on or guided by flexible, e.g. catheter-like, means
• CPC Class Codes: A61B 2090/064 for measuring force, pressure or mechanical tension
• CPC Class Codes: A61B 34/70 Manipulators specially adapted for use in surgery

Abstract

A therapeutic device system is provided with a control parameter section for calculating a control parameter for adjusting a drive amount of a manipulator with respect to a manipulation signal on the basis of curved state information on an endoscope insertion section, and changing the old control parameter, and when a state of a curve of the endoscope insertion section has changed, a control parameter conforming to the change is calculated to change the old one, whereby the same manipulation operation of the operator enables the same operation of the manipulator to be performed at all times.

Claims

1. A therapeutic device system comprising:

an input section for generating a manipulation signal from a manipulation-designated amount designated by manipulation section;

any one of a therapeutic device and a manipulator which includes articulation sections, a therapeutic device insertion section of which is inserted into a therapeutic device hole formed through to any one of an endoscope insertion section and an overtube attached to the outside of an endoscope, and in which the articulation sections can perform an articular operation in accordance with a manipulation instruction of the input section;

a detection section for detecting a curved state of the endoscope insertion section at all times;

a therapeutic device drive section for driving the therapeutic device and the manipulator in accordance with the manipulation signal; and

a control section provided with a control parameter set in advance, for controlling the articular operation of the articulation sections by changing the control parameter at all times on the basis of a detection result from the detection section, and causing the therapeutic device drive section to make the manipulation signal reflect the changed control parameter.

2. The therapeutic device system according to claim 1, further comprising, in order to cause the articulation sections of the therapeutic device insertion section to perform an articular operation:

wires connected to the articulation sections;

pulleys for performing traction of the wires by rotation; and

a pulley drive section for rotating the pulleys.

3. The therapeutic device system according to claim 1, wherein

the detection section is constituted of one of

a strain gauge for detecting a curve of a curving section provided at a distal end section of the endoscope insertion section, and the insertion section located behind the curving section,

an encoder for detecting a curve of the curving section of the endoscope insertion section by a pulley angle of the rotated pulley, and

a tension sensor for detecting tension applied to a wire when the wire is pulled to cause the multiarticular manipulator provided on the distal end side of the therapeutic device insertion section to perform an articular operation,

or is configured by combining these sensors with each other.

4. The therapeutic device system according to claim 3, wherein

information on the curved state detected by the detection section is one of

curve information on the endoscope insertion section based on a strain amount detected by the strain gauge,

a drive amount for articulation-driving the articulation sections on the basis of the pulley angle of the pulley detected by the encoder, and

a curve information on the therapeutic device insertion section based on the wire tension detected by the tension sensor,

or is information obtained by combining these pieces of information with each other.

5. The therapeutic device system according to claim 3, wherein

the control parameter possessed by the control section is one of

a scale ratio of the manipulation-designated amount designated by the manipulation section to a positional operation amount set to the therapeutic device,

an operation ratio of a manipulation-designated angle designated by the manipulation section to an angle to be formed at an articulation set to the therapeutic device,

a sensitivity ratio by which a width of a dead band set to the therapeutic device is changed with respect to a manipulation-designated amount designated by the manipulation section, and

an individual input ratio for setting an operation condition to be set to the therapeutic device with respect to a manipulation-designated amount designated by the manipulation section for each operator who performs manipulation,

or a parameter obtained by combining these parameters with each other.

6. A manipulator system comprising:

a distal end section formed into an external shape which can be inserted into an insertion path with a predetermined diameter;

a first movable section formed into an external shape which can be inserted into the insertion path, and connected to the distal end section;

a first articulation section provided at a connection section of the distal end section and the first movable section, for connecting the distal end section and the first movable section to each other so that the section and the section can move relatively to each other;

a second movable section formed into an external shape which can be inserted into the insertion path, and connected to the first movable section;

a second articulation section provided at a connection section of the first movable section and the second movable section, for connecting the first movable section and the second movable section to each other so that the section and the section can move relatively to each other;

a manipulation section capable of arbitrarily manipulating a manipulator constituted of the distal end section, the first articulation section, the first movable section, the second articulation section, and the second movable section;

a detection section which can detect external force exerted on the manipulator from the insertion path; and

a control section for controlling a drive state of the manipulator on the basis of a detection result from the detection section.

7. A therapeutic device system comprising:

a manipulator a therapeutic device insertion section of which is inserted, from the proximal end side thereof, into a therapeutic device hole inside to any one of an endoscope insertion section of an endoscope apparatus that can be freely curved and a therapeutic device hole of an overtube attached to the outside of an endoscope insertion section, then is extended outwardly from the therapeutic device hole, and is provided with a therapeutic device at a distal end thereof, and in which a plurality of curving pieces are universal-joint-connected to each other by means of articulation sections so that a plurality of degrees of freedom can be provided, and wires are fixed to each of the curving pieces;

actuator for pulling the wires to cause the curving pieces to perform an articular operation around the articulation sections, and to drive the therapeutic device;

a manipulation section for performing designation input for driving the therapeutic device, and performing designation input so that the manipulator can assume a desired target positional posture;

sensor section for detecting curved states of the endoscope insertion section and the therapeutic device insertion section;

a curved state information generation section for generating curved state information on the endoscope insertion section and the therapeutic device insertion section as required from detection signals detected by the sensor section;

a control parameter section for generating and providing a control parameter for adjusting a manipulation amount of the manipulation section to a manipulation amount of the actuator from the curved state information generated by the curved state information generation section; and

a therapeutic device control section which when the curved state information generated by the curved state information generation section is changed, changes the control parameter to a control parameter generated by the control parameter section after the change is made to thereby drive the manipulator and the therapeutic device.

8. The therapeutic device system according to claim 7, wherein

the sensor section includes

a strain gauge for detecting a curve of the endoscope insertion section as a strain amount in order to acquire curved state information;

an encoder for detecting a rotation amount of a pulley provided on a shaft of a motor serving as a drive source of the actuator; and

a tension sensor for detecting tension applied to a wire when the wire is pulled to cause the curving section provided on the distal end side of the therapeutic device insertion section to perform a curving operation.

9. The therapeutic device system according to claim 7, wherein

the curved state information generated by the curved state information generation section includes at least

curved state information on a strain amount of the endoscope insertion section detected by using a strain gauge on the endoscope insertion section;

curved state information on the wire tension at the curving section provided on the distal end side of the endoscope insertion section; and

curved state information on the wire length selected at least one of a rotation amount of the pulley detected by the encoder, a wire length of the wire pulled by the rotation amount of the pulley, and a wire length of the paid-out wire of the paid-out length.

10. A therapeutic device system comprising:

a therapeutic device of an endoscope, or an active therapeutic device to be attached after being passed through a therapeutic device hole of an overtube attached to the outside of the endoscope;

an endoscope curved state acquisition section for acquiring a curved state of the endoscope;

an active therapeutic device drive section for driving the active therapeutic device;

an active therapeutic device control section for performing control while reflecting a control parameter set in advance in a drive control signal for controlling the active therapeutic device drive section, and changed by curved state information from the endoscope curved state acquisition section; and

an input section by which an operator inputs an instruction to the active therapeutic device control section for manipulating the therapeutic device or the active therapeutic device.

11. The therapeutic device system according to claim 10, wherein

the endoscope is an active endoscope which operates by means of electric power in accordance with the manipulation of an input section, and includes an endoscope drive section, an endoscope control section, and an endoscope input section.

12. The therapeutic device system according to claim 10, wherein

the curved state information of the endoscope is one of curve information on a curving tube section of the endoscope, curve information on an insertion section other than the curving tube section of the endoscope, and a rotation amount (rotation angle) of a pulley for pulling a wire for curving the endoscope, or information obtained by combining these pieces of information with each other.

13. The therapeutic device system according to claim 10, wherein

the endoscope curved state acquisition section is incorporated in the endoscope.

14. The therapeutic device system according to claim 10, wherein

the endoscope curved state acquisition section is incorporated in the overtube.

15. The therapeutic device system according to claim 10, wherein

the endoscope curved state acquisition section is incorporated in each of the endoscope and the overtube, thereby configuring the system.

16. The therapeutic device system according to claim 11, wherein

the endoscope is an endoscope which operates by means of electric power in accordance with an instruction given thereto by remote control of the operator.

17. The therapeutic device system according to claim 11, wherein

in the endoscope, the endoscope insertion section, and the endoscope input section which is a manipulation section for the operator are configured to be attachable/detachable to/from each other.

18. The therapeutic device system according to claim 17, wherein

in the endoscope configured to be attachable/detachable, a control parameter proper to each of a plurality of endoscope insertion sections which are exchangeably connected to the electric-powered curving manipulation section is registered in advance in a table of a memory provided in the active therapeutic device control section, and a control parameter corresponding to the endoscope insertion section to be connected is read out and set at the time of connection.