WO1988001152A1 - Clamp - Google Patents

Clamp Download PDF

Info

Publication number
WO1988001152A1
WO1988001152A1 PCT/GB1987/000584 GB8700584W WO8801152A1 WO 1988001152 A1 WO1988001152 A1 WO 1988001152A1 GB 8700584 W GB8700584 W GB 8700584W WO 8801152 A1 WO8801152 A1 WO 8801152A1
Authority
WO
WIPO (PCT)
Prior art keywords
clamping
clamping device
face
passageway
elements
Prior art date
Application number
PCT/GB1987/000584
Other languages
English (en)
Inventor
John Clive Radwell
Original Assignee
Central Orthopaedics Ltd
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
Application filed by Central Orthopaedics Ltd filed Critical Central Orthopaedics Ltd
Publication of WO1988001152A1 publication Critical patent/WO1988001152A1/fr
Priority to DK216788A priority Critical patent/DK216788D0/da
Priority to GB8903493A priority patent/GB2213733A/en

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
    • A61B17/60—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 for external osteosynthesis, e.g. distractors, contractors
    • A61B17/64—Devices extending alongside the bones to be positioned
    • A61B17/6466—Devices extending alongside the bones to be positioned with pin-clamps movable along a solid connecting rod
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
    • F16B2/06—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action
    • F16B2/12—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening external, i.e. with contracting action using sliding jaws
    • 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
    • A61B17/60—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 for external osteosynthesis, e.g. distractors, contractors
    • A61B17/64—Devices extending alongside the bones to be positioned
    • A61B17/645—Devices extending alongside the bones to be positioned comprising a framework

Definitions

  • a Clamping Device FIELD OF THE INVENTION The present invention relates to an external fixator for orthopaedic use and in particular to the clamps for the guide rods and drilling pins of ' such fixators.
  • Weaponry used in modern warfare is capable of inflicting far more devastating wounds to exposed human limbs than those experienced in earlier times.
  • bullets used in today's army are designed to a far higher standard of aerodynamics, thus having a correspondingly greater propelling speed during passage to the target area.
  • the resultant high kinetic energy therefore of the modern moving bullet is such that on target impact, where the target is the human body, the transference of this energy to surrounding tissue results in widespread tissue damage, remote from the actual path of travel of the bullet through the body.
  • the bullet itself may not strike bone directly during penetration, neverthe ⁇ less, bone structure in the vicinity of the direct impact area may still suffer shatter and breakage.
  • a part of this effect is due to the phenomenon known as cavitation where the transference of energy creates a negative pressure within the tissue, creating enormous soft tissue damage, and sucking in pieces of debris which further complicate the injuries.
  • Severe bodily damage will also occur from other sources such as exploding shells and anti-personnel devices which also cause bone fractures with attendant heavy soft tissue damage.
  • fixators which are used to some effect in these adverse conditions.
  • they have to employ a bone cement to set the fixator pins which under low temperature conditions is slow to set thus placing a limit on versatility. Additionally once the cement is set later adjustment becomes impossible without intermittent breakage.
  • More sophisticated fixators are also available but for military purposes and in situations where there is a shortage of specialist skills and facilities, their usefulness is much reduced due to complexity of operation and limitations of use. They also tend to be expensive and too heavy.
  • a heavy stainless steel known fixator element employs a pair of U-shaped clamps, in the form of scaffolding clamps, one clamp being to hold the guide rod of the fixator, the other the fixing pin.
  • Each clamp is attached to a disc, the discs having serrated mating surfaces which permit relative rotation through 360°.
  • the clamps are tightened by means of a bolt passing through the limbs of the clamps and centrally of the discs in assembly.
  • Another known fixator uses stainless steel fixing elements comprised of at least two centrally tapped circular clamping discs having channels across one face of each disc.
  • a spacer disc is inserted between confronting faces of the discs in assembly, and clamping of the rod and pins is achieved by a nut and bolt passing axially of the discs through the central tappings.
  • a clamping device for the guide rods and drilling pins of an external bone fixator comprising at least two pairs of axially mounted clamping elements, at least one passageway formed between mutually confronting faces of said elements for receiving a said guide rod or pin, fastening means for fastening the elements together to secure the rod or pin in the passageway, and mutually engageable complementary formations between the confronting faces which interact to prevent relative rotation of said elements when in engagement across said confronting faces, and to resist separation thereof as the elements are fastened together around said rod or pin in the passageway.
  • a number (usually two) or pairs of the above defined interengageable clamping elements are mounted on a common axis and have radial serrations on their abutting faces which permit fixed engagement of the clamped disc pairs at any rotational position through 360°.
  • the above design may be made in a light weight material such as plastics while still meeting the needs of construc ⁇ tional reliability, versatility and adaptability demanded by modern fixators particularly in wartime situations.
  • Figure 1 is a side view of a clamping device of a bone fixator
  • Figure 2 is a sectional view through the clamping device of Figure 1, and including a clamping bolt inserted through the central tapping and of a second similar clamping device mounted in tandem;
  • Figure 3 is an end view of the clamping device of Figure 1 looking along the arrow A;
  • Figure 4 is an end view of the clamping device of Figure 1 looking along the arrow B;
  • Figure 5 and 6 are front views respectively of the confronting faces of the clamping device of Figure 1.
  • the clamping device shown in the drawings is composed of two clamping members 1 and 2.
  • the clamping member 1 is a flat circular plate made of a stiff plastics material as by injection moulding and defining two parallel flat circular faces 3 and 4 separated by a peripheral region 5.
  • An arcuate projection 6 extends out of the plane of the face 4 along its periphery. The projection 6 terminates at each end in flat surfaces 7 which lie in a plane perpendicular to the circular face 4.
  • the flat surfaces extend into the face 4 to the base wall or a recess 8, the upper wall 9 of which extends across the face 4.
  • the upper wall 9 is inwardly sloping and divergent with respect to the central axis of the circular plate 1.
  • the other clamping member 2 is formed of a flat circular plate made of a stiff plastics material and defining two parallel flat circular faces 10 and 11 separated by a peripheral region 12.
  • the plate 2 has the same diameter as plate 1 and shares a common axis in the engaged position shown in Figure 1.
  • the plate 2 has a sectored portion removed to form a flat face 13 perpendicular to the parallel faces 10 and 11, which rests across the flat surfaces 7.
  • a ledge 14 projects from the face 10 along the periphery of the flat face 13 to engage the recess 8.
  • the upper surface 15 of the ledge 14 slopes upwardly to the face 10 and convergent with respect to the common axis of the assembled clamping plates 1 and 2. so as to provide a complementary fit with the wall 9 of the recess 8.
  • the confronting faces 4 and 10 of the plates 1 and 2 each have a channel 16, which in the assembled position shown, mate to form a passageway 17 for reception of a guide rod or drilling pin of the fixator.
  • the plates 1 and 2 each have a centrally tapping 18 forming an axial passageway 19 for passage of a clamping bolt C shown in Figure 2.
  • the face 11 of the plate 2 has a square recess 20 on the axis of the passage 19 for receiving a corresponding squared head form on the shank of the clamping bolt.
  • the face 3 of the plate 1 has radial serrations S as shown in Figure 4.
  • a pair of clamping devices of the design shown in Figure 1 may be mounted on the clamping bolt C with their serrated faces in confrontation.
  • the passageway 17 in each clamping device designed to receive a guide rod and a drilling pin respeci-ively of a fixator With the passageway 17 in each clamping device designed to receive a guide rod and a drilling pin respeci-ively of a fixator, the juxtaposition of the rod and pi through 360° of rotation is then permissible by rotation of one fixing element with respect to the other on the se.rrations s «
  • the clamping bolt C is then tightened to draw tlie clamping elements together, from the slightly separated position shown in Figure 2, until the serrations engage at the desired relative rotational positions of the elements.
  • FIG. 7 A variant of the invention is shown in Figure 7. This is designed to facilitate the mounting of two pins or rods between the clamping members 19 and 20.
  • the confronting faces 21 and 22 each have two channels 23 and 24 to either side of a diametrical line of each said face.
  • a pair of mutually engageable complementary formations are formed between confronting faces 21 and 22, each similar to that formed between the confronting faces 4 and 10 of the Figures 1 to 6 embodiment, namely features 6, 7, 8, 9, 13, 14 and 15 depicted in those figures and herein fully described with reference thereto.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medical Informatics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Mechanical Engineering (AREA)
  • Surgical Instruments (AREA)

Abstract

Un clamp, destiné à maintenir les broches et les tiges d'une attelle orthopédique en matériau plastique léger, comprend une paire de disques de serrage (1, 2) montés sur un axe commun. Les broches et les tiges sont maintenues dans un ou plusieurs passages (17) formé(s) entre les faces opposées (4, 10) des disques. Afin de leur permettre de résister à la séparation et à la rotation relative des disques (1, 2) resserrés l'un vers l'autre par un boulon de serrage monté axialement, les faces opposées (4, 10) comportent des pièces à interconnexion spécialement conçues à cet effet et comprenant un évidement (8) en travers de l'une des faces et une partie en saillie complémentaire en travers de l'autre face.
PCT/GB1987/000584 1986-08-22 1987-08-19 Clamp WO1988001152A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK216788A DK216788D0 (da) 1986-08-22 1988-04-21 Klemmeorgan
GB8903493A GB2213733A (en) 1986-08-22 1989-02-16 A clamping device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868620504A GB8620504D0 (en) 1986-08-22 1986-08-22 Fixator
GB8620504 1986-08-22

Publications (1)

Publication Number Publication Date
WO1988001152A1 true WO1988001152A1 (fr) 1988-02-25

Family

ID=10603132

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1987/000584 WO1988001152A1 (fr) 1986-08-22 1987-08-19 Clamp

Country Status (5)

Country Link
EP (1) EP0321472A1 (fr)
AU (1) AU7806787A (fr)
DK (1) DK216788D0 (fr)
GB (2) GB8620504D0 (fr)
WO (1) WO1988001152A1 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0350925A1 (fr) * 1988-07-13 1990-01-17 KARL LEIBINGER MEDIZINTECHNIK GMBH & CO. Dispositif d'immobilisation externe pour fracture osseuse
EP0524441A1 (fr) * 1991-07-23 1993-01-27 Synthes AG, Chur Joint de serrage pour joindre deux éléments de construction, en particulier pour un fixateur ostéosynthétique
FR2693648A1 (fr) * 1992-07-20 1994-01-21 Cledec Dispositif externe pour maintenir en place des os ou parties d'os.
FR2697994A1 (fr) * 1992-11-19 1994-05-20 Aghion Michael Fixateur chirurgical externe d'articulation.
US5498264A (en) * 1992-07-21 1996-03-12 Synthes (U.S.A.) Clamp connection for connecting two construction components for a setting device, particularly an osteosynthetic setting device
EP0700664A1 (fr) 1994-09-06 1996-03-13 Jaquet Orthopedie S.A. Articulation pour composants d'un fixateur externe
GB2304795A (en) * 1995-07-22 1997-03-26 Neil Blair Clamp and method
WO2000018310A1 (fr) * 1998-09-29 2000-04-06 Synthes Ag Chur Dispositif pour assembler un support longitudinal et un moyen de fixation d'os
US6342054B1 (en) 1998-12-29 2002-01-29 Stryker Trauma Sa Positioning and locking device
EP1184000A1 (fr) * 2000-08-31 2002-03-06 ORTHOFIX S.r.l. Fixateur externe pour la stabilisation des fractures osseuses
US6610063B2 (en) 2000-07-28 2003-08-26 Synthes (Usa) Spinal fixation system
US6793655B2 (en) 1994-12-05 2004-09-21 Smith & Nephew, Inc. External fixator for distal radius fractures
WO2007001945A1 (fr) * 2005-06-21 2007-01-04 Synthes (U.S.A.) Bride de fixation reglable et procede associe
WO2015040291A1 (fr) 2013-09-19 2015-03-26 Assut Europe Dispositif de fixation externe pour osteosynthese de l'epaule
US9770272B2 (en) 2012-12-12 2017-09-26 Wright Medical Technology, Inc. Orthopedic compression/distraction device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096110A (en) * 1963-01-07 1963-07-02 Manostat Corp Clamp
CH579438A5 (fr) * 1974-05-22 1976-09-15 Jaquet Henri
FR2517535A1 (fr) * 1981-12-09 1983-06-10 Zbikowski Juan Dispositif d'immobilisation fonctionnelle pour osteo-synthese au moyen de fixateurs exterieurs
FR2557933A1 (fr) * 1984-01-10 1985-07-12 Srebot Dispositif d'articulation pour l'assemblage de plusieurs elements, notamment pour fixateur externe destine a l'osteosynthese
US4620533A (en) * 1985-09-16 1986-11-04 Pfizer Hospital Products Group Inc. External bone fixation apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096110A (en) * 1963-01-07 1963-07-02 Manostat Corp Clamp
CH579438A5 (fr) * 1974-05-22 1976-09-15 Jaquet Henri
FR2517535A1 (fr) * 1981-12-09 1983-06-10 Zbikowski Juan Dispositif d'immobilisation fonctionnelle pour osteo-synthese au moyen de fixateurs exterieurs
FR2557933A1 (fr) * 1984-01-10 1985-07-12 Srebot Dispositif d'articulation pour l'assemblage de plusieurs elements, notamment pour fixateur externe destine a l'osteosynthese
US4620533A (en) * 1985-09-16 1986-11-04 Pfizer Hospital Products Group Inc. External bone fixation apparatus

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0350925A1 (fr) * 1988-07-13 1990-01-17 KARL LEIBINGER MEDIZINTECHNIK GMBH & CO. Dispositif d'immobilisation externe pour fracture osseuse
CH686902A5 (de) * 1991-07-23 1996-07-31 Synthes Ag Klemmverbindung
EP0524441A1 (fr) * 1991-07-23 1993-01-27 Synthes AG, Chur Joint de serrage pour joindre deux éléments de construction, en particulier pour un fixateur ostéosynthétique
FR2693648A1 (fr) * 1992-07-20 1994-01-21 Cledec Dispositif externe pour maintenir en place des os ou parties d'os.
US5498264A (en) * 1992-07-21 1996-03-12 Synthes (U.S.A.) Clamp connection for connecting two construction components for a setting device, particularly an osteosynthetic setting device
FR2697994A1 (fr) * 1992-11-19 1994-05-20 Aghion Michael Fixateur chirurgical externe d'articulation.
AU686852B2 (en) * 1994-09-06 1998-02-12 Stryker Trauma S.A. Articulation for components of an external fixator
US5752954A (en) * 1994-09-06 1998-05-19 Howmedica International External fixation device
EP0700664A1 (fr) 1994-09-06 1996-03-13 Jaquet Orthopedie S.A. Articulation pour composants d'un fixateur externe
US6793655B2 (en) 1994-12-05 2004-09-21 Smith & Nephew, Inc. External fixator for distal radius fractures
GB2304795A (en) * 1995-07-22 1997-03-26 Neil Blair Clamp and method
GB2304795B (en) * 1995-07-22 1999-05-12 Neil Blair Securement device and method
WO2000018310A1 (fr) * 1998-09-29 2000-04-06 Synthes Ag Chur Dispositif pour assembler un support longitudinal et un moyen de fixation d'os
US6582436B2 (en) 1998-09-29 2003-06-24 Synthes (U.S.A.) Device for connecting a longitudinal support to a bone anchor
US6342054B1 (en) 1998-12-29 2002-01-29 Stryker Trauma Sa Positioning and locking device
US8221470B2 (en) 2000-07-28 2012-07-17 Synthes Usa, Llc Spinal fixation system
US9504499B2 (en) 2000-07-28 2016-11-29 DePuy Synthes Products, Inc. Spinal fixation system
US6610063B2 (en) 2000-07-28 2003-08-26 Synthes (Usa) Spinal fixation system
US7118571B2 (en) 2000-07-28 2006-10-10 Synthes (U.S.A.) Spinal fixation system
WO2002017802A1 (fr) * 2000-08-31 2002-03-07 Orthofix S.R.L. Attelle externe pour la reduction de fractures d'os
EP1184000A1 (fr) * 2000-08-31 2002-03-06 ORTHOFIX S.r.l. Fixateur externe pour la stabilisation des fractures osseuses
WO2007001945A1 (fr) * 2005-06-21 2007-01-04 Synthes (U.S.A.) Bride de fixation reglable et procede associe
TWI392473B (zh) * 2005-06-21 2013-04-11 Synthes Gmbh 用於外部固定之夾
CN101296665B (zh) * 2005-06-21 2013-05-29 新特斯有限责任公司 可调式固定夹具
US8523858B2 (en) * 2005-06-21 2013-09-03 DePuy Synthes Products, LLC Adjustable fixation clamp and method
US9545266B2 (en) 2005-06-21 2017-01-17 DePuy Synthes Products, Inc. Adjustable fixation clamp and method
US9770272B2 (en) 2012-12-12 2017-09-26 Wright Medical Technology, Inc. Orthopedic compression/distraction device
US10631900B2 (en) 2012-12-12 2020-04-28 Wright Medical Technology, Inc. Orthopedic compression/distraction device
WO2015040291A1 (fr) 2013-09-19 2015-03-26 Assut Europe Dispositif de fixation externe pour osteosynthese de l'epaule

Also Published As

Publication number Publication date
GB8620504D0 (en) 1986-10-01
GB2213733A (en) 1989-08-23
AU7806787A (en) 1988-03-08
DK216788A (da) 1988-04-21
GB8903493D0 (en) 1989-05-04
DK216788D0 (da) 1988-04-21
EP0321472A1 (fr) 1989-06-28

Similar Documents

Publication Publication Date Title
WO1988001152A1 (fr) Clamp
US5223667A (en) Plural piece flechettes affording enhanced penetration
US4641640A (en) Compression screw assembly
US5803924A (en) External fixator
EP0085493B1 (fr) Assemblage de boulon
US6340361B1 (en) External fixator clamp and system
US4757809A (en) Pin clamp
US4617922A (en) Compression screw assembly
US5564852A (en) Adjustable hot stick adaptor
US8677516B2 (en) Helmet bracket
BR112012024450B1 (pt) Fixador de painel capturado
US3029811A (en) Surgical hip nail
DE3176969D1 (en) Anti-materiel projectile
JPH10151144A (ja) 釘又はそれと同様なものの打ち込み工具
EP1813216B1 (fr) Vis pour réaliser l'accolement d'une fracture
US6063122A (en) Jack screw adapter for joint prosthesis
EP2641679A2 (fr) Interface entre deux modules de système d'un système d'outil
KR100861848B1 (ko) 유지 장치
FR2425047A1 (fr) Charge explosive a revetement pour la perforation des blindages
US4138113A (en) Dart fletching assembly
WO2020116872A1 (fr) Vis osseuse à compression inverse
WO1987007708A1 (fr) Projectile transpersant un blindage
US3242541A (en) Cable tension adjusting device
CN112890944B (zh) 一种自持锁紧螺栓起子
RU2090022C1 (ru) Ручное орудие огнева н.г.

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU DK GB JP SU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE

WWE Wipo information: entry into national phase

Ref document number: 1987905255

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1987905255

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1987905255

Country of ref document: EP