WO2020068882A1 - Minimally invasive compressor / distractor - Google Patents
Minimally invasive compressor / distractor Download PDFInfo
- Publication number
- WO2020068882A1 WO2020068882A1 PCT/US2019/052803 US2019052803W WO2020068882A1 WO 2020068882 A1 WO2020068882 A1 WO 2020068882A1 US 2019052803 W US2019052803 W US 2019052803W WO 2020068882 A1 WO2020068882 A1 WO 2020068882A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- distractor
- compressor
- screw
- instrument
- istractor
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
- A61B17/7076—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation
- A61B17/7077—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation for moving bone anchors attached to vertebrae, thereby displacing the vertebrae
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
- A61B17/7076—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation
- A61B17/7077—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation for moving bone anchors attached to vertebrae, thereby displacing the vertebrae
- A61B17/708—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation for moving bone anchors attached to vertebrae, thereby displacing the vertebrae with tubular extensions coaxially mounted on the bone anchors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
- A61B2017/0256—Joint distractors for the spine
Definitions
- the present invention relates generally to the field of surgery, and more specifically, to a compressor/distractor for use in spinal fusion surgery.
- pedicle screws are inserted into the vertebrae of the defective region and spinal fixation rods are used to rigidly fix the vertebrae relative to one another between the screws.
- spinal fixation rods are used to rigidly fix the vertebrae relative to one another between the screws.
- screw extenders may attach to the screws and are used to assist with insertion of the spinal rods.
- adjustment of the screws is needed to put the spine in the correct position for the spinal rod. This is usually done by applying compression and/or distraction forces of a compressor/distractor instrument to vertebrae via the screw extenders in the defective region.
- Some compressor/distractor instruments provide bending support to the screw extender or implant exteriorly.
- Some compressor/distractor instruments utilize a compression / tension release but lack a locking feature.
- Hinge pins without a locking feature are susceptible to disassembly.
- the present invention is directed to a minimally invasive surgery com pressor/d istractor instrument that provides internal set screw engagement for threaded reduction capabilities while also providing bending support of the screw extenders during compression or distractor manipulation. Threaded reduction is performed by engaging com pressor/d istractor support tubes at the proximal end with a com pressor/d istractor driver.
- a removable locking pull pin secures the left and right handles of the compressor/distractor driver together during use, and removal of the pin releases the compression and tension built up in the device for ease of removal.
- FIGs. 1 and 2 are perspective views showing ne embodiment of a minimally invasive surgery (MIS) compressor/distractor instrument.
- FIG. 3 is a perspective view showing the com pressor/d istractor instrument engaged with a spinal fixation system 200.
- MIS minimally invasive surgery
- FIGs. 4-7 are views showing the operation of the com pressor/d istractor instrument.
- FIG. 8 is an enlarged perspective view showing details of a hinge pull pin of the com pressor/d istractor instrument.
- Some of the current com pressor/d istractor instruments require a separate driver to be inserted down through the implant or screw extender to access the set screw.
- Other com press/d istractor instruments provide bending support to the screw extender or implant exteriorly.
- Still others utilize a hinge pull pin style compression / tension release but lack a locking feature.
- the present invention addresses these problems by using support tubes that provide two functions, the first is the compressor/distractor instrument provides strength internally to the tower or implant during compression or distraction manipulation and to also engage the set screw for reduction and tightening / loosening purposes.
- the compressor/distractor instrument utilizes support tubes are positioned internally in the screw extenders.
- the compressor/distractor instrument includes a pull pin that utilizes a ball lock mechanism that secures the hinged handles together.
- a spring loaded push button releases the ball and allows the pin to be removed, allowing the handles freedom for removal from the tower or implant.
- FIGs. 1 and 2 show one embodiment of a minimally invasive surgery (MIS) compressor/distractor instrument 100 comprising a compressor/distractor device 105 and compressor/distractor support tubes 1 10a, 1 10b.
- MIS minimally invasive surgery
- the compressor/distractor device 105 includes left and right handles 1 15a, 1 15b that are pivotably hinged together by a removable locking pin 120.
- the distal ends of the left and right handles 1 15a. 1 15b include left and right tube engagement arms 125a, 125b having an opening 126 configured to receive the com pressor/d istractor support tubes 1 10a, 1 10b and pedicle screw extenders 215 (see FIG. 3).
- the com pressor/d istractor support tubes 1 10a, 1 10b include a tubular body 155 having a central lumen 160 housing a screw driving shaft 165.
- the body 155 is configured to fit within the openings 126 on the tube engagement arms 125a, 125b.
- the tubular body 155 further includes a proximal cap 170 having a male threaded portion 175 configured to engage female threads on the pedicle screw extenders 215 on the support tube openings of the engagement arms 125a, 125b.
- the com pressor/d istractor support tubes 1 10a, 1 10b are also configured to fit within screw extensions 215 and provide bending support screw extensions 215 during compression or distractor manipulation (see FIG. 3).
- the com pressor/d istractor device 105 further includes a locking feature 130 on the proximal end of the left and right handles 1 15a, 1 15b being configured to lock the left and right handles 1 15a, 1 15b at a desired position.
- the locking feature 130 comprises a locking arm 135 having plurality of teeth 140 pivotably attached 145 to the proximal end of left arm 1 15a.
- the proximal end of the right arm 1 15b includes an arm lock 150 configured to releasably engage the locking arm 135 and the teeth 140 to lock the left and right handles 1 15a, 1 15b movement of the com pressor/d istractor device 105 during compression or distraction.
- the locking arm 135 and arm lock 140 are also configured to disengage when needed so that the left and right handles 1 15a, 1 15b can be moved away from each.
- FIGs. 3-7 show the com pressor/d istractor device 105 in use with a spinal fixation system 200 having pedicle screws 205 attached to two or more vertebrae (not shown) coupled to a fixation rod 210.
- Screw extenders 215 are removably attached to the pedicle screws 205 to assist in assembling and adjusting the spinal fixation system 200.
- the screw extenders 215 include a tubular body with a central opening or lumen extending through the body.
- the proximal end of the screw extenders 215 include female threads.
- the com pressor/d istractor support tubes 1 10a, 1 10b are sized to fit within the lumen and the male threads 175 engage the female threads to hold the support tubes in place and provide bending support of the screw extenders 215 during compression or distractor manipulation of the compressor/distractor device 105.
- the pedicle screws 205 include a body member or head 220 that includes a U-shaped channel or slot 225 to accept the fixation rod 210.
- a set screw 230 is used to threadably engage the body member 220 of the screw assembly to secure the fixation rod 210 within the body member 220.
- the proximal end 166 of the screw driving shaft 165 is configured to engage a screw driver or other tool 300.
- the distal end of the screw driving shaft 167 is configured to engage and rotate the set screw 230 to reduce and seat the fixation rod 210 in the U-shaped channel or slot 225 of the screw head 220.
- the com pressor/d istractor support tubes 1 10a, 1 10b provide internal set screw engagement for threaded reduction capabilities of the rod, while also providing bending support of the screw extensions during compression or distractor manipulation of the compressor/distractor device 105.
- the compressor/distractor support tube 1 10 is slide into the top of the openings 126 to the support tube engagement arms 125a, 125b compressor/distractor 105 and the screw extenders 215 are slid into the bottom of the openings 126.
- the male threads 175 of the compressor/distractor support tubes 1 10 are then coupled to the female threads of the screw extenders 200.
- the distal end 167 of the screw driving shaft 165 are configured to engaged with the set screws 225.
- the left and right handles 1 15a. 1 15b of the compressor/distractor device 105 are then moved to compress or distract the screw extenders 200, with the compressor/distractor support tubes 1 10 providing support for the screw extenders 200. Once in the correct position, the locking feature 130 locks the left and right handles 1 15a. 1 15b in place.
- FIG. 4 shows a screwdriver or other instrument 300 coupled to the proximal end 166 of the first screw driving shaft 165 to rotate the set screw 230 to reduce the fixation rod 210 into the u-shaped channel 225 of the body member 220 and lock the fixation rod in place.
- FIG. 5 shows the fixation rod reduction on the left tube.
- the inside lumen of the left screw extension 215L and screw head 220 include female threads configured to engage male threads of the set screw 230.
- the distal end 167 rotates the set screw 230 down the threads, which pushes the fixation rod 210 downward D into the U-shaped channel 225.
- FIG. 6 shows the screwdriver 300 coupled to the proximal end 166 of the second screw driving shaft 165 to rotate the set screw 230 to reduce the fixation rod 210 into the u-shaped channel 225 of the body member 220 and lock the fixation rod in place.
- FIG. 7 shows the fixation rod reduction on the right tube.
- the inside lumen of the right screw extension 215R and screw head 220 include female threads configured to engage male threads of the set screw 230.
- the distal end 167 rotates the set screw 230 down the threads, which pushes the fixation rod 210 downward D into the U-shaped channel 225.
- the pull pin 120 may be pulled so that the left and right handles 1 15a, 1 15b are separated.
- the pull pin 120 may utilize a ball lock mechanism that secures the hinged handles together.
- a spring loaded push button releases the ball and allows the pin to be removed, allowing the handles freedom for removal from the tower or implant.
- the compressor/distractor support tubes 1 10a, 1 10b are disengaged from the screw extensions 215.
- the compressor/distractor support tubes 1 10a, 1 10b are pulled from the screw extensions and the left and right handles 1 15a, 1 15b handles removed.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2019346553A AU2019346553A1 (en) | 2018-09-24 | 2019-09-24 | Minimally invasive compressor / distractor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201862735823P | 2018-09-24 | 2018-09-24 | |
US62/735,823 | 2018-09-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020068882A1 true WO2020068882A1 (en) | 2020-04-02 |
Family
ID=69949854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2019/052803 WO2020068882A1 (en) | 2018-09-24 | 2019-09-24 | Minimally invasive compressor / distractor |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU2019346553A1 (en) |
WO (1) | WO2020068882A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050177173A1 (en) * | 1998-10-02 | 2005-08-11 | Max Aebi | Spinal disc space distractor |
US20090171391A1 (en) * | 2007-10-23 | 2009-07-02 | Alphatec Spine, Inc. | Systems and methods for spinal fixation |
US20110106082A1 (en) * | 2009-10-30 | 2011-05-05 | Warsaw Orthopedic, Inc. | Instruments and systems for vertebral column manipulation |
US20120271308A1 (en) * | 2009-08-28 | 2012-10-25 | Stryker Trauma Ag | Surgical clamping device |
US20150351814A1 (en) * | 2012-01-16 | 2015-12-10 | K2M, Inc. | Rod reducer, compressor, distractor system |
-
2019
- 2019-09-24 AU AU2019346553A patent/AU2019346553A1/en active Pending
- 2019-09-24 WO PCT/US2019/052803 patent/WO2020068882A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050177173A1 (en) * | 1998-10-02 | 2005-08-11 | Max Aebi | Spinal disc space distractor |
US20090171391A1 (en) * | 2007-10-23 | 2009-07-02 | Alphatec Spine, Inc. | Systems and methods for spinal fixation |
US20120271308A1 (en) * | 2009-08-28 | 2012-10-25 | Stryker Trauma Ag | Surgical clamping device |
US20110106082A1 (en) * | 2009-10-30 | 2011-05-05 | Warsaw Orthopedic, Inc. | Instruments and systems for vertebral column manipulation |
US20150351814A1 (en) * | 2012-01-16 | 2015-12-10 | K2M, Inc. | Rod reducer, compressor, distractor system |
Also Published As
Publication number | Publication date |
---|---|
AU2019346553A1 (en) | 2021-05-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20210307791A1 (en) | Rod reduction device and method of use | |
US10335209B2 (en) | Systems and methods for spinal fixation | |
US9820779B2 (en) | Spinal stabilization system | |
AU2012262698B2 (en) | Minimally invasive spinal fixation system including vertebral alignment features | |
US8096996B2 (en) | Rod reducer | |
US11633216B2 (en) | Spondylisthesis reduction system | |
US8821502B2 (en) | Instrument and method for spinal compression and distraction | |
US10660631B1 (en) | Pedicle screw mounted retractor system | |
CA2581882A1 (en) | Connector transfer tool for internal structure stabilization systems | |
JP2008509759A (en) | A system that places connecting members adjacent to the spinal column with minimally invasive procedures | |
US20190029730A1 (en) | Surgical system for bone screw insertion and rod reduction | |
US8388661B2 (en) | Rod connector for attaching a bone anchor to a support rod and implantation instrument therefor | |
US11678912B2 (en) | Minimally invasive compressor / distractor | |
AU2019346553A1 (en) | Minimally invasive compressor / distractor | |
US20240000487A1 (en) | Mis multi-level compressor / distractor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 19867317 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2019346553 Country of ref document: AU Date of ref document: 20190924 Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 19867317 Country of ref document: EP Kind code of ref document: A1 |