Spinal access retractor

Patent metadata

Field	Value
Publication number	US-11103227-B2
Application number	US-201916372903-A
Country	US
Kind code	B2
Filing date	Apr 2, 2019
Priority date	Sep 20, 2010
Publication date	Aug 31, 2021
Grant date	Aug 31, 2021

Abstract

A retractor includes a first arm, a second arm, and a translating member. The first arm comprises a proximal portion configured to retain a first retractor member and a distal portion configured to rotate relative to the proximal portion about a first axis. The second arm is configured to retain a second retractor member, such that rotation of the distal portion about the first axis causes the first retractor member to pivot toward or away from the second retractor member when the first retractor member and the second retractor member are coupled to the first arm and the second arm, respectively. The translating member is coupled between the proximal portion and the distal portion, and is configured to receive a drive force that causes the translating member to bias the distal portion to pivot relative to the proximal portion about the first axis.

First claim

What is claimed:

1. A retractor configured to retract tissue, comprising:
a first arm comprising a proximal portion and a distal portion, the distal portion configured to retain a first retractor member, the distal portion configured to rotate relative to the proximal portion about a first axis;
a second arm configured to retain a second retractor member, such that rotation of the distal portion of the first arm about the first axis causes the first retractor member to pivot toward or away from the second retractor member when the first retractor member and the second retractor member are coupled to the first arm and the second arm, respectively;
a translating member coupled between the proximal and distal portions of the first arm, the translating member configured to receive a drive force that causes the translating member to bias the distal portion to pivot relative to the proximal portion about the first axis, wherein the translating member comprises a threaded shaft,
a rotating member that is threadedly coupled to the translating member, the rotating member defining a threaded bore configured to receive at least a portion of the threaded shaft, wherein the rotating member and the translating member are configured such that rotation of the rotating member moves the threaded shaft along the threaded bore to urge the distal portion to rotate in relation to the proximal portion about the first axis; and
a rotating sleeve surrounding at least a portion of the rotating member, wherein the rotating sleeve rotatably connects the rotating member to the proximal portion, and the rotating sleeve is configured to rotate the rotating member relative to the proximal portion when the threaded shaft moves along the threaded bore.

2. The retractor of claim 1 , wherein the distal portion extends from the proximal portion along the first axis.

3. The retractor of claim 1 , wherein the rotating member is configured to rotate about an additional axis that is substantially perpendicular to the first axis, and the translating member is configured to translate along the additional axis with respect to the rotating member.

4. The retractor of claim 1 , further comprising:
an extension protruding outwardly from the proximal portion, the extension defining an opening configured to receive the rotating member and the rotating sleeve; and
one or more pivot pins rotatably connecting the rotating member to the extension.

5. The retractor of claim 1 , wherein:
the second arm comprises a proximal portion and a distal portion, wherein the distal portion of the second arm is configured to rotate relative to the proximal portion of the second arm about a second axis, and
the retractor further comprises:
a second translating member coupled between the proximal portion and the distal portion of the second arm, the second translating member configured to receive a drive force that causes the second translating member to bias the distal portion of the second arm to pivot relative to the proximal portion of the second arm about the second axis, wherein the second translating member comprises a second threaded shaft;
a second rotating member that is threadedly coupled to the second translating member, the second rotating member defining a second threaded bore configured to receive at least a portion of the second threaded shaft, wherein the second rotating member and the second translating member are configured such that rotation of the second rotating member moves the second threaded shaft along the second threaded bore to urge the distal portion of the second arm to rotate in relation to the proximal portion of the second arm about the second axis; and
a second rotating sleeve surrounding at least a portion of the second rotating member, wherein the second rotating sleeve rotatably connects the second rotating member to the proximal portion of the second arm and is configured to rotate the second rotating member relative to the proximal portion of the second arm when the second threaded shaft moves along the second threaded bore.

6. A retractor configured to retract tissue, comprising:
a first arm having a proximal portion and a distal portion spaced from the proximal portion, the distal portion of the first arm configured to carry a first retractor member;
a second arm having a proximal portion and a distal portion spaced from the proximal portion of the second arm, the distal portion of the second arm configured to carry a second retractor member, wherein the distal portions of the first and second arms are spaced from one another along a first direction, and the first and second arms are pivotably coupled to each other;
a first retraction mechanism coupled to the first and second arms, wherein the first retraction mechanism is configured to move the first and second arms in unison relative to each other so as to increase a distance between the distal portions of the first and second arms along the first direction; and
a second retraction mechanism coupled to the first arm, wherein the second retraction mechanism comprises:
a rotating member that is configured to rotate about an axis so as to pivot the distal portion of the first arm relative to the proximal portion of the first arm unilaterally so as to increase the distance between the distal portions of the first and second arms in the first direction; and
a rotating sleeve surrounding at least a portion of the rotating member, wherein the rotating sleeve rotatably connects the rotating member to the proximal portion of the first arm, and the rotating sleeve is configured to rotate the rotating member relative to the proximal portion about another axis when the rotating member rotates about the axis.

7. The retractor of claim 6 , wherein the distal portion of the first arm extends from the proximal portion of the first arm along a first axis, and the second retraction mechanism is configured to pivot the distal portion of the first arm relative to the proximal portion of the first arm about the first axis.

8. The retractor of claim 6 , further comprising a third retraction mechanism coupled to the second arm, wherein the third retraction mechanism is configured to pivot the distal portion of the second arm relative to the proximal portion of the second arm so as to increase the distance between the distal portions of the first and second arms in the first direction.

9. The retractor of claim 8 , wherein the distal portion of the second arm extends from the proximal portion of the second arm along a second axis, and the third retraction mechanism is configured to pivot the distal portion of the second arm relative to the proximal portion of the second arm about the second axis.

10. The retractor of claim 9 , further comprising a handle assembly that includes a first handle portion and a second handle portion spaced from each other, wherein the proximal portion of the first arm extends from the first handle portion, the proximal portion of the second arm extends from the second handle portion, and the retractor is configured such that moving the first handle portion toward the second handle portion causes the first and second arms to move in unison relative to each other so as to increase the distance between the distal portions of the first and second arms along the first direction.

11. The retractor of claim 6 , wherein the first retraction mechanism comprises a pivot member that pivotally connects the first and second arms together, whereby the first and second arms are configured to move in unison relative to each other to increase the distance between the distal portions of the first and second arms along the first direction.

12. The retractor o

Assignees

• Depuy Synthes Products Inc

Inventors

• Baudouin Cyril
• Fenn Matthew
• Hunziker Markus
• Saidha Sean
• White Michael
• Siddique Khawar
• Perri Brian
• Lindenmann Philippe

Classifications

• A61B2017/0256

  for the spine · CPC title

• A61B17/02

  for holding wounds open, e.g. retractors; Tractors · CPC title

• A61B17/0293

  with ring member to support retractor elements · CPC title

• A61B17/808

  Instruments for holding or positioning bone plates, or for adjusting screw-to-plate locking mechanisms · CPC title

• A61B2017/00407

  Ratchet means · CPC title