IP Library › Granted Patent US 12,396,802
Granted Patent B2
US 12,396,802 · App. 18/419,622 · Granted Aug 26, 2025

Systems and methods for establishing virtual constraint boundaries

Inventors: David G. Bowling (Los Ranchos De Albuquerque, NM); Donald W. Malackowski (Schoolcraft, MI); José Luis Moctezuma de la Barrera (Freiburg, DE); Patrick Roessler (Merzhausen, DE); Jerry A. Culp (Kalamazoo, MI); John M. Stuart (Rio Rancho, NM); Joel N. Beer (Albuquerque, NM)
Assignee: Stryker Corporation
A61B34/20A61B17/02A61B17/16A61B34/30A61B34/32A61B90/03A61B2017/00734A61B2034/2048A61B2034/2055A61B2034/2061A61B2034/2068A61B2090/3937A61B2090/3945A61B2090/3983Y10S901/09Y10S901/47
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Quick Facts
Patent No.
US 12,396,802
App. No.
18/419,622
Granted
Aug 26, 2025
Kind
B2
Abstract

Surgical systems and methods of operating the same involve controlling a robotic manipulator to move a cutting instrument to cut away material from a bone at a surgical site. A machine vision system uses a vision camera to detect an object at, or in proximity to, the surgical site. A control system associates a virtual boundary with the detected object and controls the robotic manipulator to move the cutting instrument based on the virtual boundary such that the cutting instrument avoids the detected object. In one example, the control system modifies a tool path of the cutting instrument based on the virtual boundary to avoid the detected object. Additionally, or alternatively, the control system can automatically adjust an orientation of the cutting instrument based on the virtual boundary to avoid the detected object.

Claims (68)

1. A surgical system comprising:

a robotic manipulator configured to support and move a cutting instrument;

a navigation system including a localizer, a first tracker coupled to the robotic manipulator, and a second tracker coupled to a bone at a surgical site, wherein the navigation system is configured to detect the first tracker to monitor a pose of the cutting instrument and the second tracker to monitor a pose of the bone;

a machine vision system including a vision camera; and

a control system coupled to the robotic manipulator, the localizer, and the machine vision system, wherein the control system is configured to:

control the robotic manipulator to move the cutting instrument along a path to cut away material from the bone at the surgical site based on the monitored pose of the cutting instrument and the monitored pose of the bone;

detect, with the machine vision system, an object at, or in proximity to, the surgical site;

associate a virtual boundary with the object detected by the machine vision system;

adjust the path of the cutting instrument based on the virtual boundary; and

control the robotic manipulator to move the cutting instrument along the adjusted path to enable the cutting instrument to avoid the object.

2. The surgical system of claim 1 , wherein, to enable the cutting instrument to avoid the object, the control system is further configured to:

control the robotic manipulator to adjust an orientation of the cutting instrument based on the virtual boundary.

3. The surgical system of claim 1 , wherein the control system is further configured to track movement of the virtual boundary.

4. The surgical system of claim 3 , wherein the control system adjusts the path of the cutting instrument further in response to tracked movement of the virtual boundary.

5. The surgical system of claim 3 , wherein the control system is further configured to track movement of the virtual boundary with the vision camera of the machine vision system.

6. The surgical system of claim 5 , wherein the control system tracks movement of the virtual boundary with the vision camera by further being configured to:

receive images acquired by the vision camera;

identify groups of pixels in the images that are associated with the object; and

detect movement of the groups of pixels in the images.

7. The surgical system of claim 1 , wherein the object is a retractor configured to retract tissue adjacent to the bone.

8. The surgical system of claim 7 , wherein the control system associates the virtual boundary with the retractor by further being configured to:

identify the retractor with the machine vision system;

retrieve, from non-transitory memory, a geometric model of the retractor; and

utilize the geometric model to define the virtual boundary.

9. The surgical system of claim 7 , wherein the control system detects the retractor with the machine vision system by being configured to detect a tracker or tracking element coupled to the retractor.

10. The surgical system of claim 1 , wherein the object is a first object and the virtual boundary is a first virtual boundary associated with the first object, and wherein the control system is further configured to:

detect, with the machine vision system, a second object at, or in proximity to, the surgical site; and

associate a second virtual boundary with the second object.

11. The surgical system of claim 10 , wherein the control system is further configured to:

track movement of the first virtual boundary;

track movement of the second virtual boundary; and

track relative movement between the first virtual boundary and the second virtual boundary.

12. The surgical system of claim 10 , wherein:

the first object is a surgical instrument to be avoided by the cutting instrument or a soft tissue structure to be avoided by the cutting instrument; and

the second object is the bone.

13. The surgical system of claim 12 , wherein:

the second virtual boundary is a virtual constraint boundary delineating a first region of the bone to be treated by the cutting instrument from a second region of the bone to be avoided by the cutting instrument; and

the control system is further configured to control the robotic manipulator to avoid interaction of the cutting instrument with the virtual constraint boundary.

14. The surgical system of claim 12 , wherein the surgical instrument is a retractor configured to retract tissue adjacent to the bone.

15. The surgical system of claim 1 , wherein the navigation system is coupled to the control system and comprises a display device, and wherein the navigation system is further configured to:

receive a pose of the object from the machine vision system;

present, on the display device, graphical representations of: the cutting instrument, the bone, and the virtual boundary; and

update a relative spatial relationship of the graphical representations based on the poses of the cutting instrument, the bone, and the object.

16. The surgical system of claim 1 , wherein the control system controls the robotic manipulator to move the cutting instrument along the path by further being configured to operate the robotic manipulator in a semi-autonomous mode.

17. The surgical system of claim 1 , wherein the cutting instrument is a rotating cutting bur.

18. The surgical system of claim 1 , wherein the bone is a femur bone or a tibia bone, and wherein the control system controls the robotic manipulator to move the cutting instrument along the path to cut away material to prepare the femur bone or the tibia bone to receive a surgical implant for a joint arthroplasty procedure.

19. A method of operating a surgical system, the surgical system including a robotic manipulator configured to support and move a cutting instrument, a navigation system including a localizer, a first tracker coupled to the robotic manipulator, and a second tracker coupled to a bone at a surgical site, a machine vision system including a vision camera, and a control system coupled to the robotic manipulator, the localizer, and the machine vision system, the method comprising the control system:

monitoring a pose of the cutting instrument based on detection of the first tracker by the localizer and a pose of the bone based on detection of the second tracker by the localizer;

controlling the robotic manipulator for moving the cutting instrument along a path for cutting away material from the bone at the surgical site based on the monitored pose of the cutting instrument and the monitored pose of the bone;

detecting, with the machine vision system, an object at, or in proximity to, the surgical site;

associating a virtual boundary with the object detected by the machine vision system;

adjusting the path of the cutting instrument based on the virtual boundary; and

controlling the robotic manipulator for moving the cutting instrument along the adjusted path and for enabling the cutting instrument to avoid the object.

20. A surgical system comprising:

a robotic manipulator configured to support and move a cutting instrument;

a navigation system including a localizer, a first tracker coupled to the robotic manipulator, and a second tracker coupled to a bone at a surgical site, wherein the navigation system is configured to detect the first tracker to monitor a pose of the cutting instrument and the second tracker to monitor a pose of the bone;

a machine vision system including a vision camera; and

a control system coupled to the robotic manipulator, the localizer, and the machine vision system, wherein the control system is configured to:

control the robotic manipulator to move the cutting instrument to cut away material from the bone at the surgical site based on the monitored pose of the cutting instrument and the monitored pose of the bone;

detect, with the machine vision system, an object at, or in proximity to, the surgical site;

associate a virtual boundary with the object detected by the machine vision system; and

control the robotic manipulator to automatically adjust an orientation of the cutting instrument based on the virtual boundary to enable the cutting instrument to avoid the object.

21. A method of operating a surgical system, the surgical system including a robotic manipulator configured to support and move a cutting instrument, a navigation system including a localizer, a first tracker coupled to the robotic manipulator, and a second tracker coupled to a bone at a surgical site, a machine vision system including a vision camera, and a control system coupled to the robotic manipulator, the localizer, and the machine vision system, the method comprising the control system:

monitoring a pose of the cutting instrument based on detection of the first tracker by the localizer and a pose of the bone based on detection of the second tracker by the localizer;

controlling the robotic manipulator for moving the cutting instrument for cutting away material from the bone at the surgical site based on the monitored pose of the cutting instrument and the monitored pose of the bone;

detecting, with the machine vision system, an object at, or in proximity to, the surgical site;

associating a virtual boundary with the object detected by the machine vision system; and

controlling the robotic manipulator for automatically adjusting an orientation of the cutting instrument based on the virtual boundary to enable the cutting instrument to avoid the object.

Assignments (2)
CHANGE OF ADDRESS Recorded Dec 18, 2024
From: STRYKER CORPORATION
To: STRYKER CORPORATION
Reel/Frame 069737/0184 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 30, 2024
From: MALACKOWSKI, DONALD W.; MOCTEZUMA DE LA BARRERA, JOSE LUIS; ROESSLER, PATRICK; CULP, JERRY A.; BOWLING, DAVID G.; STUART, JOHN M.; BEER, JOEL N.
To: STRYKER CORPORATION
Reel/Frame 068737/0277 →
Continuity (6)
Continuation 17891288 · Aug 19, 2022
Continuation 16685442 · Nov 15, 2019
Continuation 15416717 · Jan 26, 2017
Division 14205702 · Mar 12, 2014
Provisional Application 61780148 · Mar 13, 2013
Related Publication 20240156542A1 · May 16, 2024
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