Methods and devices for a minimally invasive placement of a rod within a patient

• US 7,497,869 B2
• Filed: 01/27/2006
• Issued: 03/03/2009
• Est. Priority Date: 01/27/2006
• Status: Active Grant

• Current Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Inventors: Justis, Jeff R.
• Primary Examiner(s): Robert; Eduardo C
• Assistant Examiner(s): Rust; Ellen
• Application Number:
  US11/341,189
• Publication Number:
  US 20070191836A1
• Time in Patent Office: 1,131 Days
• Field of Search: 606/246, 606/256, 606/264, 606/265, 606/279, 606/99, 606/104, 606/103, 606/914, 606/86.R
• US Class Current: 606/279
• CPC Class Codes: A61B 17/7001 Screws or hooks combined with longitudinal elements which do not contact vertebrae A61B17/7058 takes precedence
• CPC Class Codes: A61B 17/7002 Longitudinal elements, e.g. rods
• CPC Class Codes: A61B 17/7004 with a cross-section which varies along its length A61B17/7019 takes precedence
• CPC Class Codes: A61B 17/7085 for insertion of a longitudinal element down one or more hollow screw or hook extensions, i.e. at least a part of the element within an extension has a component of movement parallel to the extension's axis

Abstract

The present application is directed to devices and methods for positioning a rod within a patient. One embodiment of the device may include an elongated inserter having a first end and a second end. A connector may be attached to the second end of the inserter for releasably connecting to the rod. The connector may be adjustable between a first position with the rod substantially coaxially aligned with the inserter, and a second position with the rod substantially perpendicular to the inserter.

Claims

1. A method of positioning a rod within an anchor in a patient, the method comprising the steps of:

attaching a rod to a distal end of an inserter by attaching a first section of the inserter at a first axial point along the rod and a second section of the inserter at a second axial point along the rod that is axially offset from the first axial point and coaxially aligning the rod with the inserter;

moving the rod and the inserter into the patient with the rod and inserter coaxially aligned;

after moving the rod and inserter a distance into the patient, axially moving the first section of the inserter relative to the second section and pivoting the first axial point about the second axial point and pivoting a first end of the rod outward from the inserter;

positioning the rod into the anchor while the rod is pivoted outward from the inserter; and

detaching the rod from the inserter while positioned in the anchor and removing the inserter from the patient.

2. The method of claim 1, wherein the step of moving the rod and the inserter into the patient comprises moving the rod and inserter through an interior section of a guide that is inserted within the patient.

3. The method of claim 2, further comprising pivoting the rod outward from the inserter and through a slot in the guide.

4. The method of claim 1, further comprising pivoting the rod outward from the inserter an amount to be substantially perpendicular to the inserter and positioning the rod into the anchor.

5. The method of claim 1, further comprising detaching the rod from the inserter when the rod is substantially perpendicular to the inserter.

6. The method of claim 1, wherein the step of moving the rod and the inserter into the patient is performed percutaneously.

7. The method of claim 1, further comprising simultaneously moving the rod into the patient and pivoting the rod outward from the inserter.

8. The method of claim 1, wherein the step of moving the rod and inserter into the patient comprises moving the rod and inserter along a door and into a guide.

9. A method of positioning a rod within an anchor in a patient, the method comprising the steps of:

attaching a rod to a distal end of an inserter and coaxially aligning the rod with the inserter;

moving the rod and the inserter through an interior of a guide and into the patient a first distance with the rod and inserter coaxially aligned;

after moving the rod and inserter the first distance into the patient, pivoting a first connection point between the rod and the inserter about a second connection point between the rod and the inserter and pivoting a first end of the rod outward from the inserter with a first end of the rod moving through a slot in the guide;

positioning the rod into a first anchor that is aligned with the guide and the first end of the rod into a second anchor that is spaced away from the first anchor; and

removing the inserter from the rod and maintaining the rod in the first and second anchors.

10. The method of claim 9, further comprising moving the rod and inserter through the interior of the guide beyond the first distance and simultaneously pivoting the first end of the rod outward from the inserter.

11. The method of claim 9, further comprising pivoting the rod outward from the inserter about 90°

and positioning the rod into the first and second anchors.

12. A method of positioning a rod within an anchor in a patient, the method comprising the steps of:

moving a rod positioned at a distal end of an inserter into an elongated guide while an axis of the rod is parallel with an axis of the inserter, the inserter including an elongated member that is operatively connected to the rod at a first point along the rod and an exterior sleeve that encircles the inserter and is operatively connected to the rod at a second point along the rod that is axially offset from the first point;

moving the rod a distance along the guide;

axially moving one of the exterior sleeve and the inserter relative to the other thereby moving one of the first and second points away from the axis of the inserter and pivoting the rod about the other of the first and second points;

positioning the rod into the anchor while the rod is pivoted relative to the inserter; and

detaching the rod from the inserter.

13. The method of claim 12, further comprising moving the elongated member in a distal direction relative to the inserter and moving the first point away from the axis of the inserter and pivoting the rod about the second point.

14. The method of claim 12, further comprising contacting a distal end of the rod against an inclined slope on an interior of the guide and pivoting the rod.

15. The method of claim 12, further comprising pivoting the rod and moving a distal end of the rod through a slot at a distal end of the guide.

16. The method of claim 12, further comprising pivoting the rod and positioned the rod into a second anchor that is spaced away from the anchor.

17. The method of claim 12, further comprising moving the rod and the inserter into the elongated guide while the rod and the inserter are coaxially aligned.

18. The method of claim 12, further comprising pivoting the rod to be perpendicular to the inserter prior to detaching the rod from the inserter.

19. A method of positioning a rod within an anchor in a patient, the method comprising the steps of:

simultaneously moving a rod and an inserter into the patient with the rod and the inserter coaxially aligned;

after moving the rod and inserter a distance into the patient, axially moving an inner member of the inserter attached to the rod at a first axial point relative to an outer member of the inserter attached to the rod at a second axial point that is axially offset from the first axial point and pivoting a first end of the rod outward from the inserter;

continuing to move the rod and the inserter into the patient beyond the distance and pivoting the rod to be perpendicular to the inserter; and

positioning the rod into the anchor while the rod is perpendicular to the inserter.

20. The method of claim 19, further comprising detaching the rod from the inserter while positioned in the anchor and removing the inserter from the patient.