Lateral retractor system and methods of use

• US 10,299,777 B2
• Filed: 03/14/2018
• Issued: 05/28/2019
• Est. Priority Date: 08/31/2011
• Status: Active Grant

• Current Assignee: Zimmer Biomet Spine, Inc. (Zimvie Incorporated)
• Original Assignee: Zimmer Biomet Spine, Inc. (Zimvie Incorporated)
• Inventors: Mast, Randall G., Burkholder, Alan R., Schifle, Andrew, Kanter, Adam, Okonkwo, David O.
• Primary Examiner(s): Philogene, Pedro
• Assistant Examiner(s): Comstock, David C
• Application Number:
  US15/921,431
• Publication Number:
  US 20180199927A1
• Time in Patent Office: 440 Days
• Field of Search: 600214, 600215, 600219, 600224, 600226
• CPC Class Codes: A61B 17/0206 with antagonistic arms as supports for retractor elements
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 17/7079 Tools requiring anchors to be already mounted on an implanted longitudinal or transverse element, e.g. where said element guides the anchor motion
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/0256 for the spine

Abstract

Technology disclosed herein relates to retractors and methods of use for surgical procedures, and in particular, spinal surgical procedures. In one embodiment, a surgical retractor includes a pair of pivotable armatures and a translatable armature. A body for supporting the armatures is provided, with a handle connected thereto. The handle includes a first rotary actuator, wherein a rotation of the first rotary actuator moves the pair of pivotable armatures in opposite arcuate directions, and a second rotary actuator, wherein a rotation of the second rotary actuator translates the translatable armature in a linear direction.

Claims

1. A surgical retractor comprising:

a retractor body;

a first armature pivotably coupled to the retractor body at a first pivot point, the first armature including gear teeth proximate the first pivot point, and the first armature rotatable between a first closed position and a first open position;

a second armature pivotably coupled to the retractor body at a second pivot point spaced apart from the first pivot point, the second armature including gear teeth proximate the second pivot point, and the second armature rotatable between a second closed position and a second open position;

a translatable armature disposed between the first pivot point and the second pivot point, the translatable armature translatable between a third closed position and a third open position;

a first actuator coupled to the retractor body and aligned with the translatable armature, the first actuator coupled to a central drive mechanism operable by the first actuator to simultaneously engage the gear teeth of each of the first armature and the second armature to move the first armature and the second armature independent of the translatable armature; and

a second actuator coupled to the retractor body and rotatable to linearly translate the translatable armature.

2. The surgical retractor of claim 1, further comprising:

a top cover plate and a bottom cover plate opposing the top cover plate, the top cover plate and the bottom cover plate secureable to the body to limit access to the drive mechanism.

3. The surgical retractor of claim 2, further comprising:

a first pin associated with the first armature, wherein the top cover plate includes a first slot configured to receive the first pin to limit rotation of the first armature relative to the body.

4. The surgical retractor of claim 3, further comprising:

a second pin associated with the second armature, wherein the top cover plate includes a second slot configured to receive the second pin to limit rotation of the second armature relative to the body.

5. The surgical retractor of claim 3, wherein the first slot comprises an arcuate shape.

6. The surgical retractor of claim 2, wherein one of the top cover plate and the bottom cover plate is comprised of a radio-opaque material.

7. The surgical retractor of claim 1, wherein one or more of the first and second actuators are removable.

8. The surgical retractor of claim 1, wherein the translatable armature is translatable independent of the first armature and the second armature.

9. The surgical retractor of claim 1, wherein one of the first and second armatures and body is comprised of a radio-opaque material.

10. The surgical retractor of claim 1, wherein one of the first and second armatures and body is comprised of a radio-lucent material.

11. A surgical retractor comprising:

a retractor body;

a first armature rotatably coupled to the retractor body at a first pivot point, the first armature including gear teeth adjacent the first pivot point, and the first armature rotatable between a first closed position and a first open position;

a second armature rotatably coupled to the retractor body at a second pivot point spaced apart from the first pivot point, the second armature including gear teeth adjacent the second pivot point, and the second armature rotatable between a second closed position and a second open position;

a translatable armature disposed along a central axis, the translatable armature translatable between a third closed position and a third open position;

a first actuator coupled to the retractor body and aligned along the central axis, and actuatabie to operate a central drive mechanism to simultaneously engage the gear teeth of the first armature and the gear teeth of the second armature to rotate the first armature and the second armature independent of the translatable armature;

a second actuator coupled to the retractor body and rotatable to linearly translate the translatable armature.

12. The surgical retractor of claim 11, wherein the gear teeth of each of the first armature and the second armature are disposed along an arcuate surface of the first armature and the second armature, respectively.

13. The surgical retractor of claim 11, further comprising:

a top cover plate and a bottom cover plate opposing the top cover plate, the top cover plate and the bottom cover plate secureable to the body to limit access to the drive mechanism.

14. The surgical retractor of claim 13, further comprising:

a first pin associated with the first armature, wherein the top cover plate includes a first slot configured to receive the first pin to limit rotation of the first armature relative to the body.

15. The surgical retractor of claim 14, further comprising:

a second pin associated with the second armature, wherein the top cover plate includes a second slot configured to receive the second pin to limit rotation of the second armature relative to the body.

16. The surgical retractor of claim 15, wherein each of the first slot and the second slot comprise an arcuate shape.

17. The surgical retractor of claim 15, wherein the first armature and the second armature are rotatable to any position defined by the first slot and the second slot, respectively.

18. The surgical retractor of claim 11, wherein the gear teeth of each of the first armature and the second armature are disposed along an arcuate surface of the first armature and the second armature, respectively.

19. The surgical retractor of claim 11, further comprising:

a first blade coupleable to a distal portion of the first armature; and

a toeing screw engageable with the first armature and operable to adjust a toe angle of the first blade.

20. A surgical retractor comprising:

a retractor body;

a first armature pivotably coupled to the retractor body at a first pivot point, the first armature rotatable between a first closed position and a first open position;

a second armature pivotably coupled to the retractor body at a second pivot point spaced apart from the first pivot point, the second armature rotatable between a second closed position and a second open position;

a translatable armature disposed between the first pivot point and the second pivot point, the translatable armature translatable between a third closed position and a third open position;

a first actuator located at least partially within the retractor body and substantially aligned with the translatable armature along a central axis, the first actuator configured to operate a central drive mechanism to engage gear teeth of each of the first armature and the second armature to move the first armature and the second armature about the first pivot point and the second pivot point, respectively, independent of the translatable armature;

a second actuator coupled to the retractor body and rotatable to linearly translate the translatable armature.