Patent US5891147A successfully refreshed from Google Patents.
US5891147A
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US
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Minimally invasive spinal surgical methods & instruments
Assignee: SDGI Holdings Inc
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Filing: 1997-09-29
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Granted: 1999-04-06
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Expires: 2017-09-29
Abstract
Abstract Minimally invasive spinal surgical techniques and tools are provided. The methods include separating the iliocostalis lumborum muscle from the anterior leaf of the thoracolumbar fascia to create a channel from the patient's skin to the intertransverse interval. In one embodiment, the method also includes delivering graft material through the channel to the intertransverse interval. A device according to one aspect of the present invention includes a retraction portion having a flattened plate configured to atraumatically retract tissue to create a working space within an endosurgical site and a curved shaft attached to the retraction portion. The shaft includes a bend having a radius of preferably 160 degrees. A gripping portion is attached to the shaft and is configured for manually gripping and manipulating the device.
Inventors
- 👤 Peter A. Moskovitz
- 👤 Scott Boden
- 👤 William F. McKay
- 👤 Joseph Moctezuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:53
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2/4603; A61F2/4611; A61B; A61B17/00; A61B17/02; A61B17/0206; A61B17/025; A61B17/16; A61B17/1604; A61B17/1606; A61B17/1608; A61B17/1637; A61F2/44; A61F2/4455; A61F2/4601; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1442; A61B17/00234; A61B2017/00238; A61B2017/00261; A61B2017/0042; A61B2017/0256; A61B17/32; A61B2017/320044; A61F2/28; A61F2002/2835; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30062; A61F2002/30108; A61F2002/3011; A61F2002/30138; A61F2002/30153; A61F2002/30199; A61F2002/30261; A61F2002/4635; A61F2/4644; A61F2002/4649; A61F2210/00; A61F2210/0004; A61F2230/00; A61F2230/0002; A61F2230/0017; A61F2230/0019; A61F2230/0063; A61F2230/0082; A61F2310/00; A61F2310/00005; A61F2310/00179; A61F2310/00293; Y; Y10; Y10S; Y10S606/00; Y10S606/907
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
108 words
A device for inserting graft material into a fusion site, comprising: a carrier element including an elongated handle and a sheath attached to one end of said handle, said sheath sized to receive the graft material, said sheath including two side walls connected by a seat, said seat defining an opening sized to expose a portion of the graft material without permitting the graft material to exit said sheath through said opening; and an obturator portion including an elongated gripping portion and an impactor attached to an end of said gripping portion, said impactor sized to fit through said opening to eject graft material received within said sheath.
Claim 2
Independent Claim
108 words
A device for inserting graft material into a fusion site, comprising: a carrier element including an elongated handle and a sheath attached to one end of said handle, said sheath sized to receive the graft material, said sheath including two side walls connected by a seat, said seat defining an opening sized to expose a portion of the graft material without permitting the graft material to exit said sheath through said opening; and an obturator portion including an elongated gripping portion and an impactor attached to an end of said gripping portion, said impactor sized to fit through said opening to eject graft material received within said sheath.
Claim 3
Dependent Claim
20 words
The device of claim 1 wherein said sheath is rectangular shaped to receive graft material shaped in a rectangular block.
Claim 4
Independent Claim
56 words
A method for arthrodesis of motion segments of the spine, comprising: creating a channel between posterior aspects of the spine to a fusion site, the channel defined between fascia and muscle and terminating at a tissue barrier between the channel and the spinal canal; and delivering an osteogenic device through the channel to the fusion site.
Claim 5
Independent Claim
56 words
A method for arthrodesis of motion segments of the spine, comprising: creating a channel between posterior aspects of the spine to a fusion site, the channel defined between fascia and muscle and terminating at a tissue barrier between the channel and the spinal canal; and delivering an osteogenic device through the channel to the fusion site.
Claim 6
Dependent Claim
22 words
The method of claim 3 wherein the tissue barrier includes the posterolateral attachments of the longissimus thoracis muscle at the facet joint.
Claim 7
Dependent Claim
14 words
The method of claim 4 wherein the osteogenic device includes a bone morphogenetic protein.
Claim 8
Dependent Claim
12 words
The method of claim 5 wherein the osteogenic device includes a bioceramic.
Claim 9
Dependent Claim
15 words
The method of claim 6 wherein the osteogenic device includes a biphasic hydroxyapatite/tricalcium phophate ceramic.
Claim 10
Dependent Claim
57 words
The method of claim 4, further comprising: dissecting the longissimus thoracis muscle from its attachments to the thoracolumbar fascia, the transverse processes and the intertransverse membrane to expose the transverse processes while preserving the attachment of muscle to the facet joints of the motion segment thereby leaving a tissue barrier between the channel and the epidural space.
Claim 11
Independent Claim
100 words
A method for arthrodesis of a motion segment after laminectomy, comprising: developing the areolar plane between the iliocostalis lumborum muscle from the anterior leaf of the thoracolumbar fascia to create a channel from the patient's skin to the intertransverse interval; dissecting the longissimus thoracis muscle from its attachments to the thoracolumbar fascia, the transverse processes and the intertransverse membrane to expose the transverse processes while preserving the attachment of the longissimus thoracis to the facet joint thereby leaving a tissue barrier between the arthrodesis site and the epidural space; and delivering graft material through the channel to the intertransverse interval.
Claim 12
Independent Claim
100 words
A method for arthrodesis of a motion segment after laminectomy, comprising: developing the areolar plane between the iliocostalis lumborum muscle from the anterior leaf of the thoracolumbar fascia to create a channel from the patient's skin to the intertransverse interval; dissecting the longissimus thoracis muscle from its attachments to the thoracolumbar fascia, the transverse processes and the intertransverse membrane to expose the transverse processes while preserving the attachment of the longissimus thoracis to the facet joint thereby leaving a tissue barrier between the arthrodesis site and the epidural space; and delivering graft material through the channel to the intertransverse interval.
References Cited (Backward Citations)
US3964480A
Cited
US4399814A
Cited
US4545374A
Cited
US4573448A
Cited
US5772661A
Cited
US5445639A
Cited
US5201729A
Cited
US5374269A
Cited
US5334194A
Cited
US5380331A
Cited
US5158543A
Cited
US5195541A
Cited
US5395317A
Cited
US5242444A
Cited
US5171279A
Cited
US5357983A
Cited
US5624446A
Cited
US5489307A
Cited
US5439464A
Cited
US5782832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-04-05 | 2002-10-05 | 2003-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-04-05 | 2006-10-05 | 2007-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-04-05 | 2010-10-05 | 2011-04-06 | $7700.00 | Window Closed / Lapsed |