GB2267757A - Adjustable gauge or template. - Google Patents

Adjustable gauge or template. Download PDF

Info

Publication number
GB2267757A
GB2267757A GB9212587A GB9212587A GB2267757A GB 2267757 A GB2267757 A GB 2267757A GB 9212587 A GB9212587 A GB 9212587A GB 9212587 A GB9212587 A GB 9212587A GB 2267757 A GB2267757 A GB 2267757A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
gauge
body member
limb
limbs
slot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9212587A
Other versions
GB9212587D0 (en )
GB2267757B (en )
Inventor
Jeffrey Keith Middleton
Original Assignee
Jeffrey Keith Middleton
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00Instruments as specified in the subgroups and characterised by the use of mechanical measuring means
    • G01B3/14Templates for checking contours
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/88Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8863Apparatus for shaping or cutting osteosynthetic equipment
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06Measuring instruments not otherwise provided for

Abstract

A gauge used as a guide for bending a soft sample rod to shape, the shaped sample rod to be used as a template for bending a surgical corrective rod, has slotted gauge limbs 2 mounted on a slotted body member 1. Each gauge limb is secured to the body member by a bolt and wing nut, and the arrangement permits the gauge limbs to be adjusted longitudinally and transversely of the body member, and angularly. Thus the gauge limbs may be adjusted to denote the position and attitude of screws inserted into vertebrae, which screws are to receive the corrective rod. There may be three, four, five or six gauge limbs. <IMAGE>

Description

GAUGE This invention relates to a gauge which is suitable for use in surgical techniques which require the bending of a rod. Such surgical techniques may include spinal surgery to correct conditions such as scoliosis. In such techniques, screws are inserted into vertebrae. The screws have slotted heads within which are clamped a common corrective steel rod. The rod as supplied is straight and needs to be bent to the required shape. It should be borne in mind that the screws will be displaced from each other, axially and angularly.

At present, the steel rod may be bent to copy the shape of an aluminium sample rod, which itself has been bent to shape whilst located in the slots in the screws.

However, this method is not very accurate.

In accordance with a first aspect of the present invention there is provided a gauge comprising a body member and a plurality of independently adjustable gauge limbs carried by the body member, each gauge limb being adjustable longitudinally of the body member, transversely of the body member and angularly with respect to the body member, means being provided to selectively permit the adjustment of the gauge limbs on the body member and to secure the gauge limbs in position on the body member, once adjusted.

During a surgical procedure, once screws are located in place, the gauge limbs may be adjusted whilst they are located within slots of the screws. Once properly located within slots of the screws, they may be secured in position on the body member. The gauge may then be used as a template for the bending of the rod. The bending of the rod may readily be effected by use of a standard rod bender, such as that known as the AO rod bender.

Preferably, each gauge limb has a contact end for contacting the base of the slot of a screw, the contact end engaging the base of the slot such that the contact end and the base of the slot are parallel to one another.

Suitably, the contact end comprises a contact edge, to rest at the base of a curved slot. Suitably, the contact end may be wider than the slot, so that lateral portions of the contact end protrude to either side of the slot.

This enables a visual check to be made, that the contact end is properly resting on the base of the slot, across its entire width.

Preferably, each gauge limb has means to permit the independent adjustment of that gauge limb, and to secure that gauge limb to the body member, once adjusted.

Preferably, a single means is provided to permit the three modes of adjustment of a gauge limb with respect to the body member.

Suitably, the body member has a linear slot, and each gauge limb has a linear slot, and each gauge limb is secured to the body member by a respective bolt and wing nut, the threaded shank of the bolt passing through both slots. When the wing nut of a gauge limb is released, the gauge limb may be moved longitudinally of the body member, with the screw moving along the slot of the body member; it may be moved transversely of the body member, with the screw moving along the slot of the gauge limb; and it may be moved angularly, with the screw maintaining its location within the two slots, but with the gauge limb simply being turned.

Suitably, the gauge may have three, four, five or six gauge limbs.

The invention will now be further described, by way of example, with reference to the accompanying drawings in which: Fig. 1 shows a gauge in side view; and Fig. 2 shows the gauge of Fig. 1 in end view.

Fig. 1 shows a gauge made up of a generally elongate body member 1 and three generally elongate gauge limbs 2, each of which is arranged transversely to the body member.

The body member has a central elongate slot 4. Each of the gauge limbs has an elongate slot 6. Each gauge limb is secured to the body member by means of a bolt 8. As seen in Fig. 2, the bolt head 10 is located to one side of the body member 1 and the respective gauge limb 2 and is too large to pass through the slots therein. The shank of the bolt passes through the slots and on the shank is engaged a wing nut 12. When the wing nut is tightened, the gauge limb is secured to the body member. When the wing nut is loosened, the gauge limb may be moved with respect to the body member, in any of three modes longitudinally, with the bolt moving along the slot 4 of the body member; transversely, with the bolt moving along the slot 6 of the gauge limb; and angularly, with the bolt remaining in its position within both slots, but the with gauge limb simply being turned.

Each gauge limb has a contact end 14 with a contact edge 16. The edge 16 is 19 mm long. The width of a slot in a screw used in spinal surgery is approximately 13 mm wide. Thus, when the contact edge is located in a slot, tangs 18 to each side of the contact end protrude to either side of the slot.

In use, once three screws are located in place in vertebrae, the three wing nuts on the gauge may be released, and the contact ends of the gauge limbs are placed within the slots of the respective screws, and moved until the edges 16 rest on the bases of the respective slots. They are moved until the tangs 18 protrude to either side of the slots, and with the edges 16 firmly in contact the base of the slots, across their entire width. The wing nuts are then tightened, and the gauge removed, and used as a template whilst the steel rod is bent, for example in a standard rod bender.

The body member and the gauge limbs are of spring quality stainless steel, of thickness 0.7 mm.

The reader's attention is directed to all papers and documents which are filed concurrently with or previous to this specification in connection with this application and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference.

All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.

Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.

The invention is not restricted to the details of the foregoing embodiment(s). The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.

Claims (6)

1. A gauge comprising a body member and a plurality of independently adjustable gauge limbs carried by the body member, each gauge limb being adjustable longitudinally of the body member, transversely of the body member and angularly with respect to the body member, means being provided to selectively permit such adjustment of the gauge limbs on the body member and to secure the gauge limbs in position on the body member, once adjusted.
2. A gauge as claimed in Claim 1, wherein each gauge limb has a contact end for contacting the base of the slot of a screw, the contact end comprising a contact edge, to rest at the base of the slot.
3. A gauge as claimed in Claim 1 or 2, wherein each gauge limb has means to permit the independent adjustment of that gauge limb, and to secure that gauge limb to the body member, once adjusted.
4. A gauge as claimed in Claim 3, wherein a single means is provided to permit the three modes of adjustment of a gauge limb with respect to the body member.
5. A gauge as claimed in any preceding claim, wherein the body member has a linear slot, and each gauge limb has a linear slot, and each gauge limb is secured to the body member by a respective bolt and wing nut, the threaded shank of the bolt passing through both slots.
6. A gauge substantially as hereinbefore described with reference to the accompanying drawings.
GB9212587A 1992-06-13 1992-06-13 Gauge Expired - Fee Related GB2267757B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9212587A GB2267757B (en) 1992-06-13 1992-06-13 Gauge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9212587A GB2267757B (en) 1992-06-13 1992-06-13 Gauge

Publications (3)

Publication Number Publication Date
GB9212587D0 true GB9212587D0 (en) 1992-07-29
GB2267757A true true GB2267757A (en) 1993-12-15
GB2267757B GB2267757B (en) 1996-03-06

Family

ID=10717047

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9212587A Expired - Fee Related GB2267757B (en) 1992-06-13 1992-06-13 Gauge

Country Status (1)

Country Link
GB (1) GB2267757B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999026548A1 (en) * 1997-11-21 1999-06-03 Synthes Ag Chur Device for simulating implants located under the skin
US7117610B2 (en) * 2004-12-10 2006-10-10 Michael Bailey Tool for scribing tile
US7493704B2 (en) 2004-12-10 2009-02-24 Michael Bailey Tool for scribing tile
US8298242B2 (en) 2010-04-30 2012-10-30 Warsaw Orthopedic, Inc. Systems, devices and methods for bending an elongate member
US8607603B2 (en) 2010-04-30 2013-12-17 Warsaw Orthopedic, Inc. Systems, devices and methods for multi-dimensional bending of an elongate member

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2261287A (en) * 1991-11-06 1993-05-12 Anthony James Breed Adjustable templates

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2261287A (en) * 1991-11-06 1993-05-12 Anthony James Breed Adjustable templates

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999026548A1 (en) * 1997-11-21 1999-06-03 Synthes Ag Chur Device for simulating implants located under the skin
US6332780B1 (en) 1997-11-21 2001-12-25 Synthes (U.S.A.) Implant simulating device
US7117610B2 (en) * 2004-12-10 2006-10-10 Michael Bailey Tool for scribing tile
US7493704B2 (en) 2004-12-10 2009-02-24 Michael Bailey Tool for scribing tile
US8298242B2 (en) 2010-04-30 2012-10-30 Warsaw Orthopedic, Inc. Systems, devices and methods for bending an elongate member
US8607603B2 (en) 2010-04-30 2013-12-17 Warsaw Orthopedic, Inc. Systems, devices and methods for multi-dimensional bending of an elongate member

Also Published As

Publication number Publication date Type
GB9212587D0 (en) 1992-07-29 application
GB2267757B (en) 1996-03-06 grant

Similar Documents

Publication Publication Date Title
US4763644A (en) Spinal fixation
US6056749A (en) Method and device for fixing and correcting spondylolisthesis anteriorly
US5478340A (en) Vertebral column implant and repositioning instrument
US6312431B1 (en) Vertebrae linking system
US4950269A (en) Spinal column fixation device
US6231610B1 (en) Anterior cervical column support device
US4913134A (en) Spinal fixation system
US6280445B1 (en) Multi-axial bone anchor system
US5092572A (en) Allograft vise
US8147524B2 (en) Instrumentation and methods for reducing spinal deformities
US4790297A (en) Spinal fixation method and system
US5944720A (en) Posterior spinal fixation system
US6090113A (en) Adjustable osteosynthesis system of the rachis
US5122131A (en) Orthopaedic device for mechanical coupling to a surgical rod
US7556639B2 (en) Methods and apparatus for vertebral stabilization using sleeved springs
EP0611116B1 (en) Spinal column retaining apparatus
US5951553A (en) Methods and apparatus for fusionless treatment of spinal deformities
US4815453A (en) Device for supporting the rachis
US4187841A (en) Bone compression or distraction device
US5196014A (en) Vertebral locking and retrieving system
US5888221A (en) Spinal stabilization implant system
US6296647B1 (en) Instrument for the positioning of an implant in the human spine
US5261909A (en) Variable angle screw for spinal implant system
US5466237A (en) Variable locking stabilizer anchor seat and screw
US4450834A (en) External fixation device

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970613