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EP0409865A1 - Fixateur d'os - Google Patents

Fixateur d'os

Info

Publication number
EP0409865A1
EP0409865A1 EP19890904190 EP89904190A EP0409865A1 EP 0409865 A1 EP0409865 A1 EP 0409865A1 EP 19890904190 EP19890904190 EP 19890904190 EP 89904190 A EP89904190 A EP 89904190A EP 0409865 A1 EP0409865 A1 EP 0409865A1
Authority
EP
European Patent Office
Prior art keywords
bone
sleeve
fixator
bone fixator
clamps
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.)
Withdrawn
Application number
EP19890904190
Other languages
German (de)
English (en)
Inventor
Albert Edward Oliver
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHEFFIELD CITY COUNCIL
Original Assignee
SHEFFIELD CITY COUNCIL
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 SHEFFIELD CITY COUNCIL filed Critical SHEFFIELD CITY COUNCIL
Publication of EP0409865A1 publication Critical patent/EP0409865A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • 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 or setting implements
    • A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements for external osteosynthesis, e.g. distractors, contractors

Definitions

  • This invention relates to bone fixation more particularly - but not exclusively - J f or the fixation of broken joints, e.g., wrists.
  • An object of the present invention is the avoidance of use of plaster casts, which cause irritation and other discomfort - even to the extent that the wearer interferes with the cast in an attempt to scratch the irritated skin or cut away a portion causing pressure.
  • Another object of the invention is to provide disposable bone f ixators, low in cost yet very efficient and readily adaptable to various broken joints or bones.
  • a bone fixator comprises a pair of clamps each having means for clamping at least two bone pins, together with sleeve means adapted to connect the clamps with each other in adjustable relative disposition, and at least one opening for the introduction into the sleeve means of a hardenable filler material for securing the clamps in their relative adjusted disposition when they have been clamped on to pairs of bone pins screwed into bone portions at each side of a fracture.
  • the hardenable filler material should have a relatively short hardening time, e.g., five minutes, so that setting of the clamps with the bone portions and setting of the filler material in the sleeve means can be performed in the operating room, thus avoiding the need to transfer the patient to a plaster cast room, where application and setting of a plaster cast can be a lengthy and costly process.
  • the hardened filler material holds the clamps with the bone portions in the set position until the fracture has mended, when the clamps are released from the bone pins for disposal with the sleeve means, and the bone pins are unscrewed from the bone portions.
  • Closure means is preferably provided for each opening or, if close enough, both openings together, particularly to prevent ingress of extraneous matter before use.
  • the sleeve means may be a flexible sleeve with its ends secured on spigots on the clamps, the flexible sleeve (which may be made of rubber or suitable plastics) allowing the clamps to be set with the bone portions in the appropriate relative dispositions (which will usually be at an angle to each other for fixation of a broken joint, but probably in line for fixation of a broken bone).
  • Each clamp conveniently comprises a pair of semi- cylindrical members, e.g., of die-cast aluminium alloy or of "rigid" plastics, e.g., an acetyl or nylon, one of which has the spigot integral with one end, and the mutually- facing flat surfaces may have aligned transverse grooves to each side of holes for a locking screw for effecting clamping of bone pins in the aligned grooves.
  • semi- cylindrical members e.g., of die-cast aluminium alloy or of "rigid" plastics, e.g., an acetyl or nylon, one of which has the spigot integral with one end, and the mutually- facing flat surfaces may have aligned transverse grooves to each side of holes for a locking screw for effecting clamping of bone pins in the aligned grooves.
  • the spigots of the clamps may have coaxial blind bores for location of reinforcement for the hardenable filler material, and such reinforcement may comprise a steel helical coil (e.g., a light compression spring).
  • the reinforcement may comprise a pair of bars extending one from within each blind bore and overlapping each other, each bar being hingedly secured in the respective blind bore by means of a cross-pin and slot, and the overlapping portions of the bars being hinged together and bent beyond the hinge in the direction in which the sleeve is to be bent or curved.
  • each spigoted clamp member includes an opening to the blind end of the bore in the spigot for introducing the filler material and enabling air to be expelled.
  • the sleeve preferably includes at least one bellows- like portion to assist in bending or curving of the sleeve without kinking, and/or to allow of some stretching or contracting of the sleeve to suit the spacing of the clamps when fixed to bone pins already screwed into bone portions.
  • the out sides of the spigots may be ribbed (or grooved) circumf erentially to assist securing of the ends of the flexible sleeve thereon, but adhesive may be used alternatively or additionally.
  • the sleeve means is preferably rigid and consists of at least two telescoping parts, one secured to or integral with a part of each clamp, the telescoping parts allowing some extending (or contracting) of the sleeve means - -V- to suit the spacing of the clamps when fixed to bone pins already screwed into bone portions, the inner part having transversely extending projections - preferably provided by a pair of transverse holes - whereby the adjusted length of the sleeve means will be "frozen" by filler material when set in the sleeve means, and at least one telescoping part - conveniently the outer part - has its clamp connected by a ball joint, whereby the clamps can be set at an angle to each other (or in line) and "frozen” in that disposition by filler material when set in the sleeve means and around the ball, which preferably has means engageable by the filler material to lock the ball positively, and such locking means may comprise a blind bore in the ball
  • the telescoping sleeve parts, ball joint, and clamp parts may be made as die-cast aluminium alloy parts or preferably of "rigid" plastics.
  • Each clamp conveniently comprises a pair of semi- cylindrical members, one of which is integral with one end of the sleeve or the ball of the ball joint, and the mutually- facing flat surfaces may have aligned transverse grooves to each, side of holes for a locking screw for effecting clamping of bone pins in the aligned grooves, or bone pins may be clamped directly between the mutually- facing flat surfaces by a pair of locking screws.
  • a ball joint may be provided at the outer end of both telescoping sleeve parts, to allow of a greater angle between the clamps than one ball joint will allow.
  • the rigid sleeve means may consist of three telescoping parts, preferably a central part with transversely extending projections in each tubular end, and a pair of outer tubular parts fitting one on each end of the central part, to allow of a greater extension of length than two telescoping parts will allow, and the central part may be provided centrally with a clamp having means for clamping at least two bone pins, to enable additional fixation to a particularly long broken bone or even a bone broken in two places.
  • Figure 1 is a part sectional side elevation of a bone fixator in accordance with the invention
  • Figure 2 is a view partly in section on the line II-II of Figure 1, showing the fixator in operative condition;
  • Figure 3 is a small scale diagram showing the fix tor of Figures 1 and 2 in relation to the bones of a hand with a Colles fracture;
  • FIG. 4 is a longitudinal section through another fixator in accordance with the invention.
  • Figure 5 is a view, partly in section on the line V-V of Figure 4, showing that fixator in operative condition;
  • Figure 6 is a part sectional side elvation of a preferred form of bone fixator in accordance with the invention.
  • Figure 7 is a view, partly in section on the line VII- II of Figure 6, showing the preferred embodiment of fixator - _- in operative condition;
  • Figures 8 and 9 are respective part sectional side elevations of two further embodiments of the invention, with Figure 9 on a smaller scale than Figures 1 and 2 or Figures 4 to 8.
  • a bone fixator 10 comprises a pair of clamps 11A, IIB each having a screw 12 for clamping two bone pins 13, together with sleeve means 14 consisting of a flexible sleeve of rubber (or alternatively, suitable plastics) connecting the clamps and having a bellows portion 15 whereby the clamps are adapted to be disposed at an angle to each other, e.g., as shown in Figure 2, and allowing some stretching or contracting of the sleeve to suit the spacing of the clamps when fixed to bone pins already screwed into bone portions e.g., as shown in Figure 3.
  • End portions 16 of the sleeve 14 are secured (e.g., by adhesive) on spigots 17 integral with one semi-cylindrical member 18 in each clamp 11A, IIB, the clamp members 18, 19 being formed of die-cast aluminium alloy (or, alternatively, of rigid plastics) with aligned grooves in their mutually- facing flat surfaces to each side of holes for the locking screw 12 for effecting clamping of the bone pins 13 in the aligned grooves.
  • the spigots 17 have coaxial blind bores 20 communicating with openings 21A, 21B, one for introducing hardenable filler material 22 (Figure 2) into the sleeve 14 and the other to enable air to be expelled from the sleeve and also so that emergence at that other opening of filler material indicates that the sleeve is full.
  • the hardenable filler material when set, secures the clamps in their relative adjusted positions, as indicated in Figures 2 and 3.
  • Reinforcement 23 for the filler material consists of a pair of bars 24 extending one from within each bl ind bore 20 and overlapping each other, each bar being hingedly secured in the respective blind bore by means of a cross-pin 25 and slot
  • Closure plugs 29 are provided for the openings 21A, 21B to prevent ingress of extraneous matter before use.
  • a bone fixator 30 comprises a pair of clamps 11A, IIB with screws 12 for clamping bone pins 13, together with sleeve means 14 consisting of rigid telescoping parts 31, 32, one integral with one part 18 of the clamp 11A and the other connected by a ball joint 33 to the clamp IIB, whereby the clamps are adapted to be disposed further apart and/or at an angle to each other, e.g., as indicated in Figure
  • An opening 21A communicates with the inside of the sleeve part 31, while an opening 21B communicates via a bore
  • Figure 5 can be introduced through one opening and air expelled through the other, emergence of filler material at that other opening indicating that the sleeve parts are full.
  • the filler material when set, secures the sleeve parts 31, 32 in their extended relative disposition, and secures the ball joint 33 and the clamp 21B in their angled disposition relative to the sleeve parts and the clamp 21A.
  • Closure plugs 29 are again provided for the openings 21A, 21B to prevent ingress of extraneous matter before use.
  • sleeve means 14 again consists of telescoping parts 31, 32, one integral with one part 18 of the clamp 11A and the other connected by a ball joint 33 to the clamp IIB, but the inner sleeve part 31 has transversely extending projections provided by a pair of transverse holes 41, whereby the adjusted length of the sleeve means 14 will be "frozen" by filler material 22 (when set) introduced through an opening 42 in the outer sleeve part 32 adjacent the ball joint 33 and alongside which is a smaller opening 43 through which air is expelled and at which filler material will eventually emerge to indicate that the sleeve means 14 is full.
  • the ball 35 is locked positively by filler material 22 setting around a pin 44 with ribs 45 extending from the ball. Both openings 42, 43 can be closed by a rotatable cover 46 to prevent ingress of extraneous matter before use.
  • the fixator 50 has its inner telescoping part 31 also connected to the clamp 11A by a ball joint 33X, the ball 35X of which likewise has a projecting pin 44X with ribs 45X, and another small opening 51 is provided adjacent the additional ball joint . so that emergence of filler material at the opening 51 will indicate that filler has reached and surrounded the pin 44X and ribs 45X.
  • a groove 52 along the outside of the inner telescoping part 31 is slidably engaged by a peg 53 projecting from the outer telescoping part 32, to ensure that the opening 51 remains uppermost along with the openings 42, 43 adjacent the ball joint 33.
  • Figure 8 also shows smaller bone pins 13 clamped directly between the mutually-facing flat surfaces of the clamp parts 18, 19 by a pair of locking screws 12 (see particularly the clamp IIB which has been shown turned through
  • the fixator 60 comprises sleeve means 14 consisting of two outer telescoping parts 32A, 32B (similar to the part 32 in Figures 6, 7 and 8) and a central part 61 with transversely extending holes 41 in each tubular end 62 slidable within the parts 32A, 32B respectively, to allow of a greater extension of length than two telescoping parts will allow, and the central part may be provided centrally with a clamp (not shown) for at least two bone pins, to enable additional fixation to a particularly long broken bone or even a bone broken in two places.
  • the rigid telescoping sleeve means 14 could be made of die-cast aluminium alloy, they are preferably made of "rigid" plastics (as indicated in Figures 6 to 9) , which enables a small G-clamp to be applied to the outside of the or each ball joint 33, 33X to lock the ball 35, 35X and its associated clamp IIB, 11A in the required position while the hardenable filler material 22 sets to secure the fixator in the required dipsosition.
  • the clamp parts 18, 19 and associated ball 35, 35X can be made of "rigid” plastics, only the bone pins 13, locking screws 12, and locking pins 44, 44X then being of metal.

Landscapes

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

Abstract

Un fixateur d'os à usage unique (10) comprend deux pinces (11A, 11B), chacune étant dotée d'éléments (12) servant à fixer deux épingles à os (13), un manchon (14) conçu pour relier les pinces (11A, 11B) entre elles selon une position relative ajustable et deux orifices (21A, 21B) permettant d'introduire dans le manchon (14) un matériau de remplissage durcissant (22) et d'expulser l'air. Une fois introduit, le matériau de remplissage (22) maintient les pinces (11A, 11B) dans leur position relative ajustable lorsqu'elles ont été fixées sur les deux épingles à os (13), elles-mêmes vissées dans des parties d'os à chaque extrémité de la fracture.
EP19890904190 1988-03-24 1989-03-23 Fixateur d'os Withdrawn EP0409865A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8807026 1988-03-24
GB888807026A GB8807026D0 (en) 1988-03-24 1988-03-24 Bone fixation

Publications (1)

Publication Number Publication Date
EP0409865A1 true EP0409865A1 (fr) 1991-01-30

Family

ID=10634038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890904190 Withdrawn EP0409865A1 (fr) 1988-03-24 1989-03-23 Fixateur d'os

Country Status (5)

Country Link
EP (1) EP0409865A1 (fr)
JP (1) JPH03505166A (fr)
AU (1) AU3367789A (fr)
GB (1) GB8807026D0 (fr)
WO (1) WO1989009031A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9002065D0 (en) * 1990-01-30 1990-03-28 Sheffield City Council Bone fixation
GB9002033D0 (en) * 1990-01-30 1990-03-28 Sheffield City Council Bone fixation
WO1997016128A1 (fr) * 1995-10-27 1997-05-09 Stanislav Georgiev Nestorov Systeme modulaire externe d'immobilisation
US5871537A (en) 1996-02-13 1999-02-16 Scimed Life Systems, Inc. Endovascular apparatus
IT1289103B1 (it) * 1996-05-15 1998-09-25 Orthofix Srl Fissatore esterno compatto
IT1298413B1 (it) * 1997-05-21 2000-01-05 Orthofix Srl Dispositivo minifissatore esterno per il trattamento di ossa piccole
DE29820434U1 (de) * 1998-11-16 1999-02-25 Dunsch-Herzberg, Renate, 22880 Wedel System zum Fixieren von Knochenfrakturen
US6336930B1 (en) * 2000-03-07 2002-01-08 Zimmer, Inc. Polymer filled bone plate
US6964667B2 (en) * 2000-06-23 2005-11-15 Sdgi Holdings, Inc. Formed in place fixation system with thermal acceleration
EP1292239B1 (fr) 2000-06-23 2013-02-13 University Of Southern California Systeme de fusion vertebrale percutanee
US7575575B2 (en) 2005-03-18 2009-08-18 Ron Anthon Olsen Adjustable splint for osteosynthesis with modular components
WO2016014911A1 (fr) 2014-07-25 2016-01-28 The Grneral Hospital Corporation Système et procédé pour un fixateur de hanche externe
CN105662561B (zh) * 2016-02-22 2019-06-04 运怡（北京）医疗器械有限公司 一种掌指骨骨折固定架

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2362741A (en) * 1944-02-18 1944-11-14 Joseph D Berke External fixation of bone fractures
US3877424A (en) * 1972-11-14 1975-04-15 William M Murray Methods and apparatus for external fixation of bone fractures
DE2440856A1 (de) * 1974-08-26 1976-03-11 Hans Dr Boretzky Schiene fuer die kieferchirurgie
DE2745504A1 (de) * 1977-10-10 1979-04-19 Erich Strickle Vorrichtung zur ruhigstellung oder stuetzung von gliedmassen von menschen und tieren
ES253459Y (es) * 1978-11-10 1982-04-16 Fijador clinico externo, de elevada estabilidad, para reduc-cion de fracturas.
GB2086231A (en) * 1980-10-31 1982-05-12 Nat Res Dev Orthopaedic fracture fixation apparatus
DE3244819A1 (de) * 1982-12-03 1984-06-07 Ortopedia Gmbh, 2300 Kiel Vorrichtung zur externen fixierung von knochenfragmenten
IT1181490B (it) * 1984-12-18 1987-09-30 Orthofix Srl Apparecchio ortopedico per la fissazione esterna assiale,ad ampia gamma di adattabilita'
US4604996A (en) * 1985-03-11 1986-08-12 Nunamaker David M External skeletal fixator
US4919119A (en) * 1986-05-20 1990-04-24 Jaquet Orthopedie, S.A. External dynamic bone fixation device
DE3628972A1 (de) * 1986-08-26 1988-03-03 Herzberg Wolfgang Aeusserer festhalter zur stabilisierung bestimmter knochenbrueche bei mensch und tier

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8909031A1 *

Also Published As

Publication number Publication date
WO1989009031A1 (fr) 1989-10-05
AU3367789A (en) 1989-10-16
JPH03505166A (ja) 1991-11-14
GB8807026D0 (en) 1988-04-27

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