Patent US6007487A successfully refreshed from Google Patents.
US6007487A
Expired / Lapsed
US
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Tissue retractor for use through a cannula
Assignee: SDGI Holdings Inc
•
Filing: 1997-08-29
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Granted: 1999-12-28
•
Expires: 2017-08-29
Abstract
Abstract Devices and methods for performing percutaneous spinal surgery under direct visualization and through a single cannula are shown. A device (10) is provided which includes an elongated cannula (20) having a first inner diameter (D I ) and an outer diameter (D O ) sized for percutaneous introduction into a patient. The cannula (20) defines a working channel (25) between its ends (21, 22) which has a second diameter (D 2 ) equal to the diameter (D I ) of the cannula sized for receiving a tool therethrough. An elongated viewing element (50) is engageable to the cannula (20) adjacent the working channel (25), preferably by a fixture (30). The fixture (30) includes a housing (31) attachable to the proximal end (22) of the cannula (20) that defines a working channel opening (35) which is in communication with the working channel (25). The housing (31) also defines an optics bore (60) adjacent the working channel opening (35). In certain embodiments, the fixture (30) supports the viewing element (50) for translation and/or rotation within the optics bore (60) along the longitudinal axis of the bore, and for rotation of the housing (31) relative to the cannula (20) so that the longitudinal axis of the optics bore (60) will rotate about the longitudinal axis of the working channel (25). Methods are also provided for performing spinal surgeries percutaneously with direct visualization and without the requirement for a fluid-maintained workspace.
Inventors
- 👤 Kevin Thomas Foley
- 👤 Maurice Mell Smith
- 👤 John B. Clayton
- 👤 Joseph Moctezuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:29
CPC Classifications
A; A61; A61M; A61M29/00; A61M29/02; A61B; A61B17/00; A61B17/02; A61B17/34; A61B17/3417; A61B17/16; A61B17/1662; A61B17/1671; A61B17/3421; A61B17/00234; A61B2017/00238; A61B2017/00261; A61B2017/00292; A61B2017/00296; A61B2017/0046; A61B2017/00469; A61B17/025; A61B2017/0256; A61B2017/0262; A61B2017/3445; A61B2017/347; A61B90/00; A61B90/30; A61B2090/306; A61B90/36; A61B90/361; A61B2090/3614; A61B90/37; A61B2090/373; A61B90/50
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
252 words
A tissue retractor for use in percutaneous surgery through a cannula having an inner cylindrical surface, said retractor comprising: a working tip configured to atraumatically displace tissue as the retractor is manipulated through the tissue; and a body having a proximal first end and a distal second end, said second end being integral with said working tip, said body sized to be rotatably received within the cannula and having a length from said first end to said second end sufficient so that said first end and said working tip can be outside the cannula when said body is within the cannula, said body having a convex surface extending along at least a portion of said length configured to conform to the inner surface of the cannula when said body and said working tip are disposed within the cannula, wherein said body includes: a first plate portion defining a first convex surface and an opposite first concave surface and including first opposite edges extending substantially parallel to said length of said body, said first plate portion subtending a first arc between said first opposite edges; and a second plate portion integral with said first plate portion and disposed between said first plate portion and said working tip, said second plate portion defining a second convex surface and an opposite second concave surface and including second opposite edges extending substantially parallel to said length, said second plate portion subtending a second arc between said second opposite edges that is different from said first arc.
Claim 2
Dependent Claim
252 words
A tissue retractor for use in percutaneous surgery through a cannula having an inner cylindrical surface, said retractor comprising: a working tip configured to atraumatically displace tissue as the retractor is manipulated through the tissue; and a body having a proximal first end and a distal second end, said second end being integral with said working tip, said body sized to be rotatably received within the cannula and having a length from said first end to said second end sufficient so that said first end and said working tip can be outside the cannula when said body is within the cannula, said body having a convex surface extending along at least a portion of said length configured to conform to the inner surface of the cannula when said body and said working tip are disposed within the cannula, wherein said body includes: a first plate portion defining a first convex surface and an opposite first concave surface and including first opposite edges extending substantially parallel to said length of said body, said first plate portion subtending a first arc between said first opposite edges; and a second plate portion integral with said first plate portion and disposed between said first plate portion and said working tip, said second plate portion defining a second convex surface and an opposite second concave surface and including second opposite edges extending substantially parallel to said length, said second plate portion subtending a second arc between said second opposite edges that is different from said first arc.
Claim 3
Dependent Claim
30 words
The tissue retractor of claim 1, wherein said first arc subtends an angle of less than 180 degrees and said second arc subtends an angle of more than 180 degrees.
Claim 4
Dependent Claim
30 words
The tissue retractor of claim of claim 1, wherein said first arc subtends an angle of about 90 degrees and said second arc subtends an angle of about 270 degrees.
Claim 5
Dependent Claim
32 words
The tissue retractor of claim 1, further comprising an arm attached to said proximal first end of said body, said arm having a gripping surface to facilitate manipulation of said tissue retractor.
Claim 6
Dependent Claim
18 words
The tissue retractor of claim 4, wherein said arm is substantially perpendicular to said length of said body.
Claim 7
Dependent Claim
258 words
A tissue retractor for use in percutaneous surgery through a cannula having an inner cylindrical surface, said retractor comprising: a working tip configured to atraumatically displace tissue as the retractor is manipulated through the tissue; a body having a proximal first end and a distal second end, said second end being integral with said working tip, said body having a convex surface configured to conform to the inner cylindrical surface of the cannula when said tissue retractor is disposed within the cannula, wherein said body is sized to be rotatably received within the cannula and has a length from said first end to said second end sufficient so that said first end and said working tip can be outside the cannula when said body is within the cannula, said body further including: a first plate portion defining a first convex surface and an opposite first concave surface and including first opposite edges extending substantially parallel to said length of said body, said first plate portion subtending a first arc between said first opposite edges; and a second plate portion integral with said first plate portion and disposed between said first plate portion and said working tip, said second plate portion defining a second convex surface and an opposite second concave surface and including second opposite edges extending substantially parallel to said length, said second plate portion subtending a second arc between said second opposite edges that is different from said first arc, wherein said second arc subtends an angle that decreases along said length toward said working tip.
Claim 8
Dependent Claim
258 words
A tissue retractor for use in percutaneous surgery through a cannula having an inner cylindrical surface, said retractor comprising: a working tip configured to atraumatically displace tissue as the retractor is manipulated through the tissue; a body having a proximal first end and a distal second end, said second end being integral with said working tip, said body having a convex surface configured to conform to the inner cylindrical surface of the cannula when said tissue retractor is disposed within the cannula, wherein said body is sized to be rotatably received within the cannula and has a length from said first end to said second end sufficient so that said first end and said working tip can be outside the cannula when said body is within the cannula, said body further including: a first plate portion defining a first convex surface and an opposite first concave surface and including first opposite edges extending substantially parallel to said length of said body, said first plate portion subtending a first arc between said first opposite edges; and a second plate portion integral with said first plate portion and disposed between said first plate portion and said working tip, said second plate portion defining a second convex surface and an opposite second concave surface and including second opposite edges extending substantially parallel to said length, said second plate portion subtending a second arc between said second opposite edges that is different from said first arc, wherein said second arc subtends an angle that decreases along said length toward said working tip.
Claim 9
Dependent Claim
35 words
The tissue retractor of claim 6, wherein said second arc subtends an angle of about 200 degrees adjacent said first plate portion decreasing to an angle of less than 10 degrees adjacent said working tip.
Claim 10
Dependent Claim
17 words
The tissue retractor of claim 7, wherein said first arc subtends an angle of about 200 degrees.
Claim 11
Dependent Claim
177 words
A tissue retractor for use in percutaneous surgery through a cannula having an inner cylindrical surface, said retractor comprising: a working tip configured to atraumatically displace tissue as the retractor is manipulated through the tissue; and a body having a proximal first end and a distal second end, said second end being integral with said working tip, said body having a convex surface configured to conform to the inner cylindrical surface of the cannula when said tissue retractor is disposed within the cannula, said body sized to be rotatably received within the cannula and having a length from said first end to said second end sufficient so that said first end and said working tip can be outside the cannula when said body is within the cannula, wherein said convex surface of said body is at a diameter that is greater than the diameter of the inner cylindrical surface of the cannula, said body being resiliently deformable to be insertable into the cannula with said convex surface in contact with the inner cylindrical surface of the cannula.
Claim 12
Dependent Claim
177 words
A tissue retractor for use in percutaneous surgery through a cannula having an inner cylindrical surface, said retractor comprising: a working tip configured to atraumatically displace tissue as the retractor is manipulated through the tissue; and a body having a proximal first end and a distal second end, said second end being integral with said working tip, said body having a convex surface configured to conform to the inner cylindrical surface of the cannula when said tissue retractor is disposed within the cannula, said body sized to be rotatably received within the cannula and having a length from said first end to said second end sufficient so that said first end and said working tip can be outside the cannula when said body is within the cannula, wherein said convex surface of said body is at a diameter that is greater than the diameter of the inner cylindrical surface of the cannula, said body being resiliently deformable to be insertable into the cannula with said convex surface in contact with the inner cylindrical surface of the cannula.
Claim 13
Dependent Claim
15 words
The tissue retractor of claim 9, wherein said working tip has a blunt curved end.
Claim 14
Dependent Claim
22 words
The tissue retractor of claim 9, wherein said body includes a curved plate defining said convex surface and an opposite concave surface.
Claim 15
Dependent Claim
37 words
The tissue retractor of claim 11, wherein said curved plate includes opposite edges extending substantially parallel to said length of said body, said curved plate subtending an arc between said opposite edges of at least 200 degrees.
Claim 16
Dependent Claim
21 words
The tissue retractor of claim 12, wherein said curved plate subtends an arc between said opposite edges of about 270 degrees.
Claim 17
Dependent Claim
32 words
The tissue retractor of claim 9, further comprising an arm attached to said proximal first end of said body, said arm having a gripping surface to facilitate manipulation of said tissue retractor.
Claim 18
Dependent Claim
18 words
The tissue retractor of claim 14, wherein said arm is substantially perpendicular to said length of said body.
Claim 19
Dependent Claim
250 words
A tissue retractor for use in percutaneous surgery through a cannula having an inner cylindrical surface, said retractor comprising: a working tip configured to atraumaticaly displace tissue as the retractor is manipulated through the tissue; and a body having a proximal first end and a distal second end, said second end being integral with said working tip, said body having a convex surface defining a working channel between said first end and said second end configured to receive at least one surgical tool therethrough when said tissue retractor is disposed within the cannula, said body having a length from said first end to said second end sufficient so that said first end and said working tip can be outside the cannula when said body is within the cannula, wherein said body includes: a first plate portion defining a first convex surface and an opposite first concave surface and including first opposite edges extending substantially parallel to said length of said body, said first plate portion defining a circular cross-section between said first opposite edges subtending a first arc; and a second plate portion integral with said first plate portion and disposed between said first plate portion and said working tip, said second plate portion defining a second convex surface and an opposite second concave surface and including second opposite edges extending substantially parallel to said length, said second plate portion defining a circular cross-section between said second opposite edges subtending a second arc that is different from said first arc.
Claim 20
Dependent Claim
250 words
A tissue retractor for use in percutaneous surgery through a cannula having an inner cylindrical surface, said retractor comprising: a working tip configured to atraumaticaly displace tissue as the retractor is manipulated through the tissue; and a body having a proximal first end and a distal second end, said second end being integral with said working tip, said body having a convex surface defining a working channel between said first end and said second end configured to receive at least one surgical tool therethrough when said tissue retractor is disposed within the cannula, said body having a length from said first end to said second end sufficient so that said first end and said working tip can be outside the cannula when said body is within the cannula, wherein said body includes: a first plate portion defining a first convex surface and an opposite first concave surface and including first opposite edges extending substantially parallel to said length of said body, said first plate portion defining a circular cross-section between said first opposite edges subtending a first arc; and a second plate portion integral with said first plate portion and disposed between said first plate portion and said working tip, said second plate portion defining a second convex surface and an opposite second concave surface and including second opposite edges extending substantially parallel to said length, said second plate portion defining a circular cross-section between said second opposite edges subtending a second arc that is different from said first arc.
Claim 21
Dependent Claim
20 words
The tissue retractor of claim 16, wherein said body is configured to conform to the inner surface of the cannula.
Claim 22
Dependent Claim
15 words
The tissue retractor of claim 17, wherein said body is rotatably received within the cannula.
Claim 23
Dependent Claim
22 words
The tissue retractor of claim 17, wherein said body includes a curved plate defining said convex surface and an opposite concave surface.
Claim 24
Dependent Claim
42 words
The tissue retractor of claim 19, wherein said curved plate includes opposite edges extending substantially parallel to said length of said body, said curved plate defining a circular cross-section extending between said opposite edges subtending an arc of at least 200 degrees.
Claim 25
Dependent Claim
30 words
The tissue retractor of claim 16, wherein said first arc subtends an angle of less than 180 degrees and said second arc subtends an angle of more than 180 degrees.
Claim 26
Dependent Claim
30 words
The tissue retractor of claim of claim 16, wherein said first arc subtends an angle of about 90 degrees and said second arc subtends an angle of about 270 degrees.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-12-27 | 2003-06-28 | 2003-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-12-27 | 2007-06-28 | 2007-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-12-27 | 2011-06-28 | 2011-12-28 | $7700.00 | Window Closed / Lapsed |