System of preoperative planning and provision of patient-specific surgical aids

Patent metadata

Field	Value
Publication number	US-9717508-B2
Application number	US-201113282550-A
Country	US
Kind code	B2
Filing date	Oct 27, 2011
Priority date	Oct 29, 2010
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

A method of preoperative planning and provision of patient-specific surgical aids includes creating a virtual model of a native patient tissue. A virtual device is placed into a predetermined device orientation relative to the virtual model of the native patient tissue. At least one predetermined landmark orientation is specified for placement of at least one virtual landmark relative to the native patient tissue. A virtual patient-specific template containing the predetermined landmark orientation and having a landmark guiding feature is generated. At least one virtual patient-specific placement guide configured to interact simultaneously with at least one previously placed virtual landmark and the virtual device when the virtual device is in the predetermined device orientation is generated. A physical patient-specific template is created as a tangible representation of the virtual patient-specific template. A physical patient-specific placement guide is created as a tangible representation of the virtual patient-specific placement guide.

First claim

Having described the invention, we claim:

1. A method of preoperative planning and provision of patient-specific surgical aids, the method comprising the steps of:
creating a virtual model of a native patient tissue;
placing a virtual device into a predetermined device orientation relative to the virtual model of the native patient tissue;
specifying at least one predetermined landmark orientation for placement of at least one virtual landmark relative to the native patient tissue, the at least one virtual landmark being representative of a non-tissue landmark;
generating a virtual patient-specific template positioned on said virtual model, the virtual patient-specific template containing the predetermined landmark orientation and having a landmark guiding feature for placement of the non tissue landmark in said predetermined landmark orientation relative to the native patient tissue;
generating at least one virtual patient-specific placement guide configured to interact simultaneously with the at least one virtual landmark in said predetermined landmark orientation, with the virtual model of the native patient tissue after removal of the virtual patient-specific template, and
with the virtual device when the virtual device is in the predetermined device orientation;
creating a physical patient-specific template as a tangible representation of the virtual patient specific template for placing the non-tissue landmark in the native patient tissue; and
creating a physical patient-specific placement guide as a tangible representation of the virtual patient-specific placement guide separate from the physical patient-specific template, the physical patient-specific placement guide for interacting with the non-tissue landmark sequentially after removal of the patient-specific template after use of the patient-specific template to install the non-tissue landmark.

2. The method of claim 1 , including the steps of:
specifying at least one structural change to the native patient tissue to facilitate placement of the device in the predetermined device orientation; and
creating a virtual model of an altered patient tissue responsive to the step of specifying at least one structural change to the native patient tissue.

3. The method of claim 2 wherein the step of specifying at least one structural change to the native patient tissue includes the step of comparing the native patient tissue with a reference patient tissue model, the reference patient tissue model being at least one of a contralateral patient tissue model, a standard reference patient tissue value, a standard reference patient tissue value range, and a predetermined average patient tissue model.

4. The method of claim 1 , including the step of creating a physical model of the native patient tissue as a tangible representation of the virtual model of the native patient tissue, the physical model of the native patient tissue including at least one information feature providing clinically useful information to the user.

5. The method of claim 2 , including the step of creating a physical model of the altered patient tissue as a tangible representation of the virtual model of the altered patient tissue, the physical model of the altered patient tissue including at least one information feature providing clinically useful information to the user.

6. The method of claim 1 , including the steps of:
specifying at least one target trajectory and at least one penetration location for the insertion of a penetrating structure into the patient tissue in a predetermined penetration orientation;
generating at least one penetration-guiding feature embodying the specified target trajectory and penetration location; and
providing the penetration-guiding feature to at least one of the virtual patient-specific template and the virtual patient-specific placement guide.

7. The method of claim 1 wherein the step of placing a virtual device into a predetermined device orientation relative to the virtual model of the native patient tissue includes the steps of:
providing at least two optional device orientations;
comparing the optional device orientations;
choosing an optional device orientation; and
designating the chosen optional device orientation as the predetermined device orientation.

8. The method of claim 7 wherein the step of choosing an optional device orientation includes the step of comparing at least one device property at each optional device orientation, the device properties including at least one of device size, device shape, device material, number of fasteners, type of fasteners, size of fasteners, shape of fasteners, amount of patient tissue alteration, type of patient tissue alteration, orientation of the device relative to another device, and physical quality of the native patient tissue.

9. The method of claim 1 , including the step of choosing the virtual device from a library of available virtual devices.

10. A method of preoperative planning and provision of patient-specific surgical aids,
the method comprising the steps of:
choosing a device for placement in engagement with a native patient tissue;
virtually specifying a predetermined device orientation for the device with respect to the native patient tissue;
virtually placing at least one landmark in a predetermined landmark orientation with respect to the predetermined device orientation, the at least one landmark being representative of a non-tissue landmark;
virtually modeling a patient-specific template, the patient-specific template being configured to mate with the native patient tissue, the patient-specific template having a landmark guiding feature configured to place the non-tissue landmark in the predetermined landmark orientation when the patient-specific template is mated with the native patient tissue;
virtually modeling a patient-specific placement guide, the patient-specific placement guide being configured to simultaneously mate with the device and the native patient tissue after removal of the virtual patient-specific template, and registered with the at least one landmark when the device is in the predetermined device orientation;
creating a physical version of the patient-specific template for placing the non-tissue landmark in the native patient tissue; and
creating a physical version of the patient-specific placement guide separate from the physical version of the patient-specific template, the physical patient-specific placement guide for interacting with the non-tissue landmark sequentially after removal of the patient-specific template after use of the physical patient-specific template to install the non-tissue landmark.

11. The method of claim 10 , including the steps of:
specifying at least one structural change to the native patient tissue to facilitate placement of the device in the predetermined device orientation; and
creating a model of an altered patient tissue responsive to the step of specifying at least one structural change to the native patient tissue.

12. The method of claim 11 wherein the step of specifying at least one structural change to the native patient tissue includes the step of comparing the native patient tissue with a reference patient tissue model, the reference patient tissue model being at least one of a contralateral patient tissue model, a standard reference patient tissue value, a standard reference patient tissue value range, and a predetermined average patient tissue model.

13. The method of claim 10 , including the step of creating a physical version of the native patient tissue, the physical version of the native patient tissue including at least one information

Assignees

• Iannotti Joseph P
• Barsoum Wael K
• Bryan Jason A
• O'Neill Peter D
• Cleveland Clinic Found

Inventors

• Iannotti Joseph P
• Barsoum Wael K
• Bryan Jason A
• O'Neill Peter D

Classifications

• A61B2034/108

  Computer aided selection or customisation of medical implants or cutting guides · CPC title

• A61B17/1739 Primary

  specially adapted for particular parts of the body · CPC title

• A61F2002/4633

  for selection of endoprosthetic joints or for pre-operative planning · CPC title

• A61B34/25

  User interfaces for surgical systems · CPC title

• A61B2034/105

  Modelling of the patient, e.g. for ligaments or bones · CPC title