Enhanced control of flexible endoscopes through human-machine interface

• US 9,173,551 B2
• Filed: 09/10/2012
• Issued: 11/03/2015
• Est. Priority Date: 09/09/2011
• Status: Active Grant

• Current Assignee: Children's National Medical Center
• Original Assignee: Children's National Medical Center
• Inventors: Peters, Craig, Cleary, Kevin, Luo, Haifeng
• Primary Examiner(s): Leubecker, John P
• Assistant Examiner(s): TORRES DIAZ, ARNALDO
• Application Number:
  US13/608,487
• Publication Number:
  US 20130123580A1
• Time in Patent Office: 1,149 Days
• Field of Search: 600/104, 600/102, 600/424, 600/114, 600/118, 600/149, 600/427, 604/95.04
• US Class Current: 1/1
• CPC Class Codes: A61B 1/00006 of control signals
• CPC Class Codes: A61B 1/0014 Fastening element for attaching accessories to the outside of an endoscope, e.g. clips, clamps or bands
• CPC Class Codes: A61B 1/00149 using articulated arms
• CPC Class Codes: A61B 1/0016 using motor drive units
• CPC Class Codes: A61B 1/0052 Constructional details of control elements, e.g. handles
• CPC Class Codes: A61B 1/0057 Constructional details of force transmission elements, e.g. control wires
• CPC Class Codes: A61B 1/307 for the urinary organs, e.g. urethroscopes, cystoscopes
• CPC Class Codes: A61B 2034/301 for introducing or steering flexible instruments inserted into the body, e.g. catheters or endoscopes
• CPC Class Codes: A61B 2034/304 including a freely orientable platform, e.g. so called 'Stewart platforms'

Abstract

An electromechanical drive system with drop-in capability allows manipulation of the majority of existing endoscopes. The invention does not require retrofitting of existing endoscopes and maintains the current clinical workflow. The drive system can be controlled through a human/machine interface, which could consist of a variety of different input devices, including a joystick, keyboard, or game controller.

Claims

1. A motorized system for improving manipulation of an endoscope, comprising:

a mechanical device that holds and drives the endoscope;

a motion control system having processing circuitry configured to control the mechanical device; and

a human/machine interface that allows a user to control the mechanical device through the motion control system;

wherein the mechanical device comprises;

a base;

a linear platform that causes linear movement of the endoscope, the linear platform being mounted on the base and being linearly movable relative to the base;

a rotation mechanism that causes rotation of the endoscope and of a support that includes two parallel support rods, the rotation mechanism being mounted on the linear platform and being movable with the linear platform; and

a tip-flexion mechanism including a motor that provides motive power that causes bending of the tip of the endoscope, the tip-flexion mechanism being mounted on the support and being movable with the linear platform, wherein

the rotation mechanism further rotates the tip-flexion mechanism together with rotation of the endoscope, and wherein

the two parallel support rods pass through a frame that holds the tip-flexion mechanism, and the frame that holds the tip-flexion mechanism is adjustable along a length of the two parallel support rods.

2. The motorized system of claim 1, wherein the human/machine interface comprises a six-degree-of-freedom (6-DOF) controller.

3. The motorized system of claim 2, wherein the 6-DOF controller comprises a mouse.

4. The motorized system of claim 1, wherein the linear platform comprises:

a moving part mounted on the base being linearly movable relative to the base; and

the two parallel support rods, extending from the moving part, on which the rotation mechanism and the tip-flexion mechanism are mounted.

5. The motorized system of claim 1, wherein the linear platform further comprises at least one member for removably holding a body of the endoscope.

6. The motorized system of claim 5, comprising at least one said member for removably holding the body of the endoscope, and

wherein said at least one member for removably holding the body of the endoscope comprises:

a docking frame for holding the handle of the endoscope; and

a cover panel removably attachable to the docking frame for retaining the body of the endoscope.

7. The motorized system of claim 6, wherein the tip-flexion mechanism is attached to the docking frame.

8. The motorized system of claim 6, wherein the rotation mechanism comprises:

a rotation shaft for engaging with the handle of the endoscope;

a motor;

a drive wheel coaxial with the motor; and

a loop for conveying rotational movement from the drive wheel to the rotation shaft.

9. The motorized system of claim 1, wherein the tip-flexion mechanism is adapted to engage with a lever on a handle of the endoscope to actuate the lever to bend the tip of the endoscope.

10. The motorized system of claim 9, wherein the tip-flexion mechanism comprises:

an engaging element for engaging with the lever; and

a mechanical linkage for conveying movement from the motor to the engaging element.

11. The motorized system of claim 10, wherein the mechanical linkage comprises:

a first belt pulley connected coaxially to the motor;

a belt;

a second belt pulley connected to the first belt pulley by the belt; and

a shaft connected coaxially to the second pulley; and

wherein the engaging element is on the shaft.

12. The motorized system of claim 10, wherein the engaging element comprises a pole.

13. The motorized system of claim 1, wherein the motion control system comprises a computer programmed to provide automatic or semi-automatic control of the mechanical device.

14. A method for using and manipulating an endoscope, the method comprising:

(a) providing a motorized system for improving manipulation of an endoscope, the motorized system comprising;

a mechanical device that holds and drive the endoscope,

a motion control system having processing circuitry configured to control the mechanical device, and

a human/machine interface that allows a user to control the mechanical device through the motion control system,

wherein the mechanical device comprises;

a base,

a linear platform that causes linear movement of the endoscope, the linear platform being mounted on the base and being linearly movable relative to the base,

a rotation mechanism that causes rotation of the endoscope and of a support that includes two parallel support rods, the rotation mechanism being mounted on the linear platform and being movable with the linear platform, and

a tip-flexion mechanism including a motor that provides motive power that causes bending of the tip of the endoscope, the tip-flexion mechanism being mounted on the support and being movable with the linear platform, wherein

the rotation mechanism further rotates the tip-flexion mechanism together with rotation of the endoscope, and wherein

the two parallel support rods pass through a frame that holds the tip-flexion mechanism, and the frame that holds the tip-flexion mechanism is adjustable along a length of the two parallel support rods;

(b) providing the endoscope in the device;

(c) inserting the endoscope into a patient; and

(d) using the motorized system to manipulate the endoscope within the patient.

15. The method of claim 14, wherein the human/machine interface comprises a six-degree-of-freedom (6-DOF) controller.

16. The method of claim 15, wherein the 6-DOF controller comprises a mouse.

17. The method of claim 14, wherein the linear platform comprises:

a moving part mounted on the base being linearly movable relative to the base; and

the two parallel support rods, extending from the moving part, on which the rotation mechanism and the tip-flexion mechanism are mounted.

18. The method of claim 14, wherein the linear platform further comprises at least one member for removably holding a body of the endoscope, and wherein step (b) comprises inserting the endoscope into the at least one member.

19. The method of claim 18, wherein the at least one member for removably holding the body of the endoscope comprises:

a docking frame for holding the body of the endoscope; and

a cover panel removably attachable to the body frame for retaining the body of the endoscope.

20. The method of claim 19, wherein the tip-flexion mechanism is attached to the docking frame.

21. The method of claim 19, wherein the rotation mechanism comprises:

a rotation shaft for engaging with the handle of the endoscope;

a motor;

a drive wheel coaxial with the motor; and

a loop for conveying rotational movement from the drive wheel to the rotation shaft.

22. The method of claim 14, wherein the tip-flexion mechanism is adapted to engage with a lever on a handle of the endoscope to actuate the lever to bend the tip of the endoscope.

23. The method of claim 22, wherein the tip-flexion mechanism comprises:

an engaging element for engaging with the lever; and

a mechanical linkage for conveying movement from the motor to the engaging element.

24. The method of claim 23, wherein the mechanical linkage comprises:

a first belt pulley connected coaxially to the motor;

a belt;

a second belt pulley connected to the first belt pulley by the belt; and

a shaft connected coaxially to the second pulley; and

wherein the engaging element is on the shaft.

25. The method of claim 23, wherein the engaging element comprises a pole.

26. The method of claim 14, wherein the motion control system comprises a computer programmed to provide automatic or semi-automatic control of the mechanical device, and

wherein step (d) is performed under the automatic or semi-automatic control of the computer.

27. The method of claim 14, wherein the endoscope is an ureteroscope.

28. The method of claim 14, wherein step (c) comprises manually inserting the endoscope into a region of interest in the patient and using the mechanical device to move the endoscope within the region of interest.

29. A motorized system for improving manipulation of an endoscope, comprising:

a mechanical device that holds and drives the endoscope;

a motion control system having processing circuitry configured to control the mechanical device; and

a human/machine interface that allows a user to control the mechanical device through the motion control system;

wherein the mechanical device comprises;

a base;

a linear platform and a first motor that causes linear movement of the endoscope, the linear platform being mounted on the base and being linearly movable by the first motor relative to the base;

a rotation mechanism including a second motor that rotates a support that includes two parallel support rods to cause a rotation of the endoscope in a first rotation direction, the rotation mechanism being mounted on the linear platform and being linearly movable with the linear platform by the first motor; and

a tip-flexion mechanism including a third motor that provides motive power that causes bending of a tip of the endoscope in a second rotation direction that is different from the first rotation direction, the tip-flexion mechanism being mounted on the support and being rotatable in the first rotation direction by the second motor and being linearly movable with the linear platform by the first motor, wherein

the rotation mechanism rotates the tip-flexion mechanism together with rotation of the endoscope in the first rotation direction, and wherein

the two parallel support rods pass through a frame that holds the tip-flexion mechanism, and the frame that holds the tip-flexion mechanism is adjustable along a length of the two parallel support rods.

30. The motorized system of claim 29, wherein the frame that holds the tip-flexion mechanism includes a first U- shaped support and a first removable cover that hold a first side of a body of the endoscope.

31. The motorized system of claim 30, wherein a second U-shaped support and a second removable cover hold a second side of the body of the endoscope that is closer to the tip of the endoscope than the first side, and the second U-shaped support is fixed to ends of the two parallel support rods.