Computer assisted orthopaedic surgery system for ligament graft reconstruction -> Monitor Keywords

Site News |

Monitor Keywords |

Monitor Archive |

Organizer |

Account Info |

07/20/06 - USPTO Class 600 | 80 views | #20060161052 | Prev - Next | About this Page

Computer assisted orthopaedic surgery system for ligament graft reconstruction

Title: Computer assisted orthopaedic surgery system for ligament graft reconstruction

Related Patent Categories: Surgery, Diagnostic Testing

Brief Patent Description - Full Patent Description - Patent Claims

The Patent Description & Claims data below is from USPTO Patent Application 20060161052, Computer assisted orthopaedic surgery system for ligament graft reconstruction.

1. A computer assisted orthopedic surgery system for ligament graft reconstruction where bone morphology is utilized to calculate a laxity parameter.

2. A computer assisted orthopedic surgery system for ligament graft reconstruction which is configured to capture two or more reference points on a bone and has a user interface to permit a bone morphology template to be selected, wherein a laxity parameter of a joint between two bones is calculated.

3. A computer assisted orthopedic surgery system for ligament graft reconstruction comprising: a system for obtaining data indicative of a location for ligament graft placement with respect to at least a first bone and a second bone, the system includes: a position determining device that is capable of tracking the relative movements of the first and second bones using reference bodies that are attached to the first and second bones; and a pointer that has a tip for contacting a surface of at least one of the first and second bones to capture one or more reference points; and a computer that is configured to determine and track intraoperative positions of the reference bodies and the pointer and to provide isometric and impingement data for a ligament graft placement based on a realistic simulation of a trajectory of a deformable ligament graft.

4. The system of claim 3, wherein the isometric data is determined in part by laxity test data and the reference points used to calculate the laxity test data include lateral and medial glenoid reference points.

5. The system of claim 4, wherein the laxity test data includes data obtained from at least two pre-operative laxity tests selected from the group consisting of an anterior drawer test, a medio-lateral stability test, a Lachman test, and a pivot shift test.

6. The system of claim 5, wherein one of the reference points is an anterior inter-meniscal ligament reference point that is used as a primary reference point in the pivot shift test.

7. The system of claim 5, wherein the computer is configured to calculate a quantitative value for the pivot shift test that represents a maximum translation of at least one reference point for a set of prescribed knee motions, the quantitative value being displayed on a display associated with the computer.

8. The system of claim 7, wherein the at least one reference point is an anterior inter-meniscal ligament reference point of a femur which comprises the first bone, while the second bone is a tibia and the value of maximum translation is determined by comparing, at any given flexion angle, a first position of the anterior inter-meniscal ligament reference point in a neutral position prior to performing the pivot shift test and a second position of the anterior inter-meniscal ligament reference point after performing the pivot shift test, with a difference between the first and second positions representing a translation value, the value of maximum translation being the maximum translation value between the first and second positions at the same angle.

9. The system of claim 3, wherein the computer is configured to display in real time a deformable model of the ligament graft superimposed on three dimensional representations of the first and second bones.

10. The system of claim 3, wherein the computer is configured to provide on a display in real time three dimensional representations of the first and second bones as well with the isometric data being presented in an isometric map displayed on the screen and which includes an anisometric value to assist the physician in comparing and optimizing the isometric characteristics of the ligament.

11. The system of claim 3, wherein the computer provides isometric and impingement data for a ligament graft placement based on a realistic simulation of a trajectory of a deformable ligament graft to permit selection of optimal fixation points for the ligament graft, the computer being configured to determine a drill tunnel length of bone tunnels that terminate at one of the fixation points and are adapted to receive the ligament graft as well as aiding implant screw sizing and selection.

12. The system of claim 3, wherein the computer is configured to compare, store and display preoperative and postoperative joint laxity data.

13. The system of claim 3, wherein the system is configured to precisely measure, analyze, and display knee joint laxities in translation and rotation for a set of prescribed knee motions.

14. The system of claim 3, wherein the relative positions of these reference points being used in calculating at least one of the isometric and impingement data which is displayed on a display associated with the computer.

15. The system of claim 3, wherein the computer includes a display that shows in real time images of the first and second bones generated by bone morphing techniques and relative positions therebetween and a meter that indicates the relative amount of reference points that have been captured, the meter being in the form of a bar meter that increases in size as more reference points are captured.

16. The system of claim 3, wherein the computer calculates at least one laxity parameter of a joint between the first and second bones to provide the isometric and impingement data for the ligament graft placement.

17. The system of claim 16, wherein the at least one laxity parameter is calculated based on a laxity test selected from the group consisting of an anterior drawer test, a medial-lateral stability test, a Lachman test, and a pivot shift test, wherein measures values of the at least one laxity parameter is numerically and graphically displayed in real time during the test.

18. The system of claim 17, further including a user interface tool which displays the movement of the tibia relative to the femur during the laxity test, the user interface tool having a graphic display to show results of measured values from the laxity test and graphically illustrate a range of the measured values over the range of captured reference points, the user interface tool being configured to include a locator that highlights the measured value for a current position of the first bone relative to the second bone.

19. The system of claim 18, wherein the graphic display is the form of an elongated indicator showing the range of the measured values, with the locator being in the form of a ring that surrounds the elongated indicator and has a different contrast compared to the elongated indicator, wherein a relative position of the ring axially along the elongated indicator represents how the current measured value compares to the other measured values.

20. The system of claim 19, wherein the elongated indicator has along its longitudinal axis, a first portion and a second portion visually identifiable from the first portion with a neutral position of the measured values being indicated where the first and second portions abut, with the ring being located along the longitudinal axis to permit easy comparison between the measured value of the current position of the bones and the neutral position.

21. The system of claim 3, wherein the computer is configured so that when investigating and calculating the anisometry of the ligament graft replacement between a first point selected on the first bone and a second point selected on the second point, an anisometry map is generated and visually displayed, a length of the ligament graft replacement being plotted on the y axis and the flexion in degrees being plotted on the x axis.

22. The system of claim 21, wherein the anisometry map includes indicators for quickly indicating to the physician if the system is operating normally, wherein a first indicator is in the form of a first arrow having an increasing slope, while a second indicator is in the form of a second arrow having a decreasing slope, the first arrow indicating that if the slope of plotted points on the map is in the same direction as the first arrow, a system fault exists.

23. The system of claim 3, wherein the computer is configured to visually display in real time a first selected point on the first bone and a second selected point on the second bone, the first and second points representing planned points for insertion of the ligament graft replacement into the respective bones, the visual display including an anisometry map and the impingement data.

24. The system of claim 3, wherein the one or more captured reference points represent bone surface points that are then supplied to bone morphing software that extrapolates these points to obtain a complete a bone surface representation.

25. A method for conducting at least one of an ACL, MCL or LCL reconstruction or restoration procedure including the step of calculating a laxity value of a joint between two bones.

26. The method of claim 25, wherein the calculation step includes adjusting the trajectory of the ligament based on modeled bone morphology.

27. The method of claim 25, wherein the calculation step involves determining a value for a pivot shift test and displaying the value on a graphic display.

28. The method of claim 25, further including displaying an anisometric map on a display, the map plotting a length of the ligament over a range of flexion degrees, with an anisometric value being calculated based on the data plotted on the map.

Brief Patent Description - Full Patent Description - Patent Claims

Click on the above for other options relating to this Computer assisted orthopaedic surgery system for ligament graft reconstruction patent application.
###

How KEYWORD MONITOR works... a FREE service from FreshPatents
1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored.
3. Each week you receive an email with patent applications related to your keywords.
Start now! - Receive info on patent apps like Computer assisted orthopaedic surgery system for ligament graft reconstruction or other areas of interest.
###

Previous Patent Application:
A surgical sealing device
Next Patent Application:
Limited use medical probe
Industry Class:
Surgery

###

Design/code © 2009 FreshContext LLC/Freshpatents.com. Website Terms and Conditions - Also read: About this Page
Patent data source: patents published by the United States Patent and Trademark Office (USPTO)
Information published here is for research/educational purposes only (and in conjunction with our Keyword Monitor) and is not meant to be used in place of the full USPTO patent document/images or a comprehensive patent archive search. Complete official applications are on file at the USPTO and often contain additional data/images (Freshpatents is currently text-only). FreshPatents.com is not affiliated with or endorsed by the USPTO or firms/individuals or products/designs/ideas related to listed patents.

FreshPatents.com Support
Thank you for viewing the Computer assisted orthopaedic surgery system for ligament graft reconstruction patent info.
IP-related news and info

Results in 0.32207 seconds

Other interesting Feshpatents.com categories:
Canon USA , Celera Genomics , Cephalon, Inc. , Cingular Wireless , Clorox , Colgate-Palmolive , Corning , Cymer , 174

* Protect your Inventions
* US Patent Office filing

Provisional Patent
Utility Patent

PATENT INFO