Instruments and methods for stabilization of bony structures

• US 7,717,944 B2
• Filed: 08/20/2004
• Issued: 05/18/2010
• Est. Priority Date: 10/20/1999
• Status: Expired due to Term

• Current Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Inventors: Sherman, Michael C., Justis, Jeff R., Foley, Kevin T.
• Primary Examiner(s): Robert; Eduardo C
• Assistant Examiner(s): COMSTOCK, DAVID C
• Application Number:
  US10/922,639
• Publication Number:
  US 20050021031A1
• Time in Patent Office: 2,097 Days
• Field of Search: 606/61, 606/64, 606/73, 606/96, 606/98, 606/99, 606/104, 606/86.A
• US Class Current: 606/279
• 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 17/1671 for the spine
• CPC Class Codes: A61B 17/7038 to a different extent in different directions, e.g. within one plane only
• CPC Class Codes: A61B 17/7086 Rod reducers, i.e. devices providing a mechanical advantage to allow a user to force a rod into or onto an anchor head other than by means of a rod-to-bone anchor locking element; rod removers
• CPC Class Codes: A61B 17/7089 wherein insertion is along an arcuate path
• CPC Class Codes: A61B 17/88 Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices A61B17/7074 takes precedence
• CPC Class Codes: A61B 17/8872 Instruments for putting said fixation devices against or away from the bone A61B17/7074, A61B17/808 take precedence
• CPC Class Codes: A61B 17/8897 Guide wires or guide pins
• CPC Class Codes: A61B 17/90 Guides therefor
• CPC Class Codes: A61B 2017/681 Alignment, compression, or distraction mechanisms

Abstract

The present invention relates to methods and instruments for placing a brace or connecting element into an animal subject for engagement with anchors secured in the animal subject. The installation instrument includes anchor extensions coupled to the anchors. The instrument is movable with respect to the anchors to position the connecting element in a position more proximate the anchors.

Claims

1. A minimally invasive surgical method, comprising:

positioning at least a pair of anchors within a body of a patient;

threadingly engaging the pair of anchors to bony structure in the patient;

contacting a connecting element with an insertion instrument;

aligning a position of the connecting element relative to a position of the pair of anchors; and

inserting the connecting element into a desired subcutaneous position relative to the pair of anchors, wherein inserting the connecting element includes guiding a leading end of the connecting element through tissue of the patient from a location remote from each of the pair of anchors and then to a first one of the pair of anchors and then to the other of the pair anchors so that the connecting element extends between the pair of anchors.

2. The method of claim 1, further comprising releasably engaging a pair of extensions to respective ones of the pair of anchors with each extension extending proximally from the respective anchor and projecting from the body of the patient.

3. The method of claim 2, wherein inserting the connecting element includes moving the insertion instrument relative to the pair of extensions.

4. The method of claim 3, wherein positioning the pair of anchors includes engaging the pair of anchors to pedicles of respective ones of first and second vertebrae.

5. The method of claim 2, wherein the pair of extensions project from the body together through a single incision.

6. The method of claim 5, wherein the connecting element is inserted into the patient through a location remote from the single incision.

7. The method of claim 1, wherein positioning the pair of anchors includes engaging the pair of anchors to pedicles of respective ones of first and second vertebrae.

8. The method of claim 7, further comprising engaging the connecting element to the pair of anchors.

9. The method of claim 1, further comprising percutaneously controlling the position of the pair of anchors to align passageways of the pair of anchors.

10. A minimally invasive surgical method, comprising:

positioning at least a pair of anchors within a body of a patient, where each of the pair of anchors comprises an anchor portion and a receiver member, where each receiver member comprises a body having a passageway therethrough;

percutaneously controlling a position of the passageway of each respective receiver member; and

inserting a connecting element into the patient and between the passageways of the pair of anchors, wherein inserting the connecting element includes guiding a leading end of the connecting element through tissue of the patient from a location remote from each of the pair of anchors and then to a first one of the pair of anchors and then to the other of the pair anchors so that the connecting element extends between the pair of anchors.

11. The method of claim 10, wherein the receiver member is movably connected to the anchor portion.

12. The method of claim 10, further comprising releasably engaging a pair of extensions to respective ones of the pair of anchors with each extension extending proximally from the respective anchor and projecting from the body of the patient.

13. The method of claim 12, wherein percutaneously controlling the position of the passageway includes manipulating the extensions to align the passageways with one another.

14. The method of claim 13, wherein inserting the connecting element into the patient includes inserting the connecting element between the aligned passageways of the pair of anchors.

15. The method of claim 12, wherein the pair of extensions extend from the body together through a single incision.

16. The method of claim 10, wherein positioning the pair of anchors includes engaging the pair of anchors to pedicles of respective ones of first and second vertebrae.

17. The method of claim 16, further comprising engaging the connecting element to the pair of anchors.

18. The method of claim 10, wherein the receiver member is pivotably connected to the anchor portion.