EP0031809A1 - Dispositif de compression ou d'etirement des os - Google Patents

Dispositif de compression ou d'etirement des os

Info

Publication number
EP0031809A1
EP0031809A1 EP19790900831 EP79900831A EP0031809A1 EP 0031809 A1 EP0031809 A1 EP 0031809A1 EP 19790900831 EP19790900831 EP 19790900831 EP 79900831 A EP79900831 A EP 79900831A EP 0031809 A1 EP0031809 A1 EP 0031809A1
Authority
EP
European Patent Office
Prior art keywords
tool
bone
set forth
distraction
bone compression
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Withdrawn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
EP19790900831
Other languages
German (de)
English (en)
Inventor
Richard A. Knutson
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0031809A1 publication Critical patent/EP0031809A1/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Withdrawn legal-status Critical Current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, 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
    • A61B17/66—Alignment, compression or distraction mechanisms
    • 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
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8004—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones

Definitions

  • the present invention is related to surgical tools and, more particularly, is directed towards a device which may be utilized to either compress or distract a bone fracture.
  • Bone fracture may be enhanced by utilizing various compression devices which hold the fractured bone together.
  • Such devices typically utilize a bone plate which must be secured to the bone on both sides of the fracture by, for example, pins, clamps or screws.
  • bone hooks which require the use of two hands, are commonly uti ⁇ lized. Due to their disjunctive nature, such hooks provide uneven, unsteady forces which are difficult to manipulate and control.
  • Another object of the present invention is to provide a surgical device which may be utilized either for bone compression or distraction with equal facility and which does not require encircling of the bone.
  • Another object of the present invention is to provide a bone compression and distraction device which holds the bone solidly, allows the surgeon to have two hands free, requires minimal assistance in installation and removal, allows free access to other bone surfaces, and which provides even and steady forces in both com ⁇ pression and distraction.
  • An additional object of the present invention is to provide a unique bone compression and distraction device which is of simple construction, is durable, easy to clean, has no sharp edges, may be utilized on either small or large bones, provides firm bone contact and hold during use, permits easy adjustment during use for precise fit, and includes structural features which prevent misuse.
  • Another general object of the present invention is to provide an inexpensive bone compression or distrac ⁇ tion tool the use of which lessens soft tissue exposure, bone damage, and thereby will reduce potential infection.
  • a bone compression or distrac ⁇ tion tool which comprises a threaded shaft and a cap member secured to one end of the shaft and having at least one relatively short pin projecting therefrom.
  • the tool also includes a threaded sleeve rotatably engaged about the threaded shaft and knob means secured to and extending outwardly from the sleeve for enabling rotation of same and which forms a shoulder.
  • the tool further includes a pin-carrying member which is remov ⁇ ably fittable about the sleeve and has at least one relatively short pin projecting therefrom.
  • One end of the pin-carrying member is engagable by the shoulder of the knob means so as to move toward or away from the cap member upon rotation of the knob means.
  • the cap member may include a plurality of differently sized pins projecting therefrom, whereby bones of differing sizes may be worked on by the same tool.
  • the cap member and the pin-carrying member each have at least one substantially planar face which is adapted to be adjacent the bone during use and which are coplanar, parallel to the axis of the shaft, and respec- tively have the short pins extending therefrom.
  • each of the short pins are approximately 0.635 centimeter long and are angled at approximately 5 degrees from an axis perpendicular to the axis of the threaded shaft.
  • the short pins are inclined towards one another, and the threaded sleeve is positioned between the knob means and the cap member, whereby the tool serves as a bone compression device.
  • the short pins are angled away from one another, and the knob means is positioned between the cap member and the threaded sleeve, whereby the tool serves as a bone distraction device.
  • the threaded sleeve extends along the shaft on both sides of the knob member whereby the tool may serve as either a bone compression or distraction device, depending upon the positioning of the pin-carrying member.
  • the pin-carrying member includes an opening along its length which is wider than the diameter of the shaft but which is smaller than the diameter of the sleeve.
  • the pin-carrying member also includes an unthreaded inner substantially cylindrical surface having a smaller radius at one portion thereof than that at a second portion thereof. The first portion of the inner surface is adapted to be placed about the threaded shaft, while the second portion thereof is adapted to be placed about the sleeve.
  • a second cap member is pref ⁇ erably secured to the other end of the shaft, and the knob means may be provided with apertures on the periphery thereof adapted to receive a spanner wrench for assisting in the turning or tightening of same.
  • Figure 1 is a side view of a preferred embodiment of a bone compression tool in accordance with the present invention.
  • Figure 2 is a left side view of the preferred embodiment illustrated in Figure 1;
  • Figure 3 is a right side view of the preferred embodiment illustrated in Figure 1;
  • Figure 4 is an enlarged, cross-sectional view of the preferred embodiment illustrated in Figures 1 through 3 and which is taken along line 4-4 of Figure 3;
  • Figure 5 is a sectional view of the preferred embodiment of Figures 1 through 5 which is taken along line 5-5 of Figure 4;
  • Figure 6 is a side view of an alternate preferred embodiment of the present invention.
  • Figure 7 is a left end view of the alternate embodiment of Figure 6;
  • Figure 8 is a view similar to Figure 6 but showing one component of the alternate embodiment removed;
  • Figure 9 is a schematic illustration of the first preferred embodiment of Figures 1 through 5 in use;
  • Figure 10 is a side view which schematically illustrates the operation of the embodiment of Figures 6 through 8;
  • Figure 11 is a cross-sectional view illustrating the components of the alternate embodiment of Figures 6 through 8;
  • Figure 12 illustrates the alternate embodiment of Figures 6 through 8 and 11 but in an alternate mode of operation;
  • Figure 13 is an enlarged view of one of the compo- nents common to both of the preferred embodiments of the present invention.
  • Figure 14 is a perspective view of a spanner wrench which may be utilized with either of the pre ⁇ ferred embodiments of the present invention.
  • reference numeral 10 indi- cates one preferred embodiment of the present invention which, in this form, is utilized as a bone compression tool.
  • the bone compression device 10 includes a threaded shaft 12 having a round cap 14 attached to one end thereof.
  • Cap 14 may be secured, for example, by being tapped, threaded and spot-welded to one end of shaft 12.
  • the fixed cap 16 Secured to the distal end of shaft 12 is a fixed cap 16 so that elements 12, 14 and 16 move together as a unit either laterally or in rotation.
  • the fixed cap 16 includes at least one substantially planar surface 18 which is adapted to be positioned adjacent the surface of the bone during use.
  • a rela ⁇ tively short (for example, 0.635 centimeter) pin 20 Projecting from the planar surface 18 is a rela ⁇ tively short (for example, 0.635 centimeter) pin 20 which is adapted to be inserted within a pre-drilled hole in the fractured bone.
  • Pin 20 may be any convenient diameter, such as 0.3175 centimeter, and is preferably angled at approximately a 5 degree angle with respect to the vertical axis perpendicular to the axis of shaft 12.
  • the compression device 10 of the present invention may be provided with more than one pin for added versa ⁇ tility.
  • an additional planar surface 22 having a larger diameter (for example, 0.47625 centimeter) pin 24 projecting therefrom.
  • the fixed cap 16 is provided in this embodiment with a hexagonal outer surface, although the precise shape thereof may be varied to suit the particular need.
  • Knob 28 Positioned between the end caps 14 and 16 is a sleeve 26 which is internally threaded so as to be movable along the length of threaded shaf 12.
  • a knob 28 is formed at one end of the sleeve 26 and cannot accidently be rotated off shaft 12 due to end cap 14.
  • Knob 28 preferably has a knurled outer surface 30 to facilitate manual grasping and turning thereof, thereby preventing slippage during surgical use due to blood and other tissue fluids.
  • the outer surface 30 also pref- erably includes a plurality of apertures 32 which are spaced to receive a turning tool, such as the spanner wrench illustrated, for example, in Figure 14, allowing for more firm compression than attainable through dig ⁇ ital rotation of knob 28.
  • Member 36 includes at least one planar surface 38 which is preferably coplanar with the planar surface 18 of fixed cap 16. Extending from planar surface 38 is a relatively short pin 40 of the same diameter and length as the pin 20, but which is angled towards pin 20.
  • the pin-carrying member 36 also preferably includes an additional planar surface 42 having a larger diameter pin 44 extending therefrom.
  • Pin 44 is sized similarly to pin 24, and surface 42 is preferably coplanar with surface 22.
  • the removable pin-carrying member 36 includes an end portion 46 having a C-shaped opening 48. Opening 48 extends along the entire length of member 36 and is of a width W which is smaller than the diameter of threaded sleeve 26 but has a slightly larger diameter than that of the threaded shaft 12.
  • member 36 is unthreaded and substantially cylindrical (except for opening 48) and forms a reduced diameter portion 50 which is adapted to fit about the shaft 12, and an increased diameter por ⁇ tion 52 which is adapted to fit about the sleeve 26. Note that the portion 54 of the opening 48 that is adjacent the shaft 12 is also unthreaded so that the member 36 may be pushed towards the fixed member 16 by rotation of knob 28 without itself being rotated.
  • FIG. 9 there are illustrated t o bone portions 56 and 58 separated by a fracture 60.
  • Appropriately-sized holes 62 and 64 are drilled through the cortex of bone portions 56 and 58.
  • pin 20 is inserted into hole 62 until surface 18 is adjacent the outer surface of bone 56 adjacent hole 62.
  • Knob 28 is then rotated until pin 40 is prop- erly positioned to fit within hole 64.
  • any adjustment to the position of pin 20 may be effected by rotating knob 14.
  • the knob 28 may be rotated either manually or with the assistance of the spanner wrench ( Figure 14) to draw the bone portions 56 and 58 into compression.
  • the tool 10 of the present invention remains in position while an appropriate bone plate is secured.
  • the non- encircling nature of the tool 10 facilitates installa ⁇ tion of the bone plate, and the secure seating of pins
  • OMPI 20 and 40 combined with the adjacent planar faces 18 and 38, free the hands of the surgeon to install the plate without fear of additional fracture, or loosening of the present invention.
  • the tool 10 of the present invention may be readily removed by simply loosening the knob 28.
  • the fixed end piece 70 includes several planar surfaces 72, 74, 76 and 78, each of which has a relatively short pin 80, 82, 84 and 86 extending therefrom.
  • Pins 80 and 84 may be similarly sized (for example, 0.3175 centimeter) and may, as best illustrated in Figure 11, consist of the same piece 88 rigidly fixed within the body 70.
  • pins 82 and 86 are of a larger size (for example, 0.47625 centimeter) and may also consist of the same piece firmly secured within the fixed end 70.
  • Pins 80 and 86 are angled rearwardly so as to be utilized in a distraction procedure, while pins 82 and 84 are angled forwardly and may be utilized during a compression procedure.
  • the threaded sleeve portion of this embodiment is modified to include an additional sleeve member 96 which extends to the other side of knurled knob 30 so as to form a shoulder portion 94.
  • Sleeve portion 96 and shoulder 94 are utilized in conjunction with member 36 during a distraction procedure.
  • a cross section of the alternate embodiment illustrating member 36 properly positioned prior to a distraction procedure is illus ⁇ trated in Figure 11. It may be appreciated that the similarly-sized pins 40 and 80 are angled away from one another. In operation, as illustrated in Figure 10, bone pieces 96 and 98 overlap and must be distracted by applying forces thereto in a direction opposite to that required for a compression procedure.
  • appropriately-sized holes 100 and 102 are drilled in bone pieces 96 and 98 for receiving pins 80 and 40, respectively.
  • knob 30 is rotated in the opposite sense to the direction it would be rotated for a compression procedure, which draws the bone pieces 96 and 98 away from one another along the direction indi ⁇ cated by the arrows.
  • additional holes may be drilled and a compression device installed to com ⁇ press and then apply a plate to the fracture, similar to the procedure described above in connection with Figure 9.
  • the tool consists of three basic pieces: one which is fixed, one which moves, and one which is removable. All pieces are preferably constructed out of stainless
  • the various sizes of pins permit use of the same tool on both large and small bones.
  • the planar surfaces adjacent the projec ⁇ tions allow the device to lay flat against a bone during use which adds further to the steady, even appli ⁇ cation of force.
  • the preferred 5 degree angle of inclina- tion of. the pins provides for firm bone contact and grip during use.
  • the knurled wheel may be rotated by fin ⁇ gertip or by a spanner wrench, as may be necessary.
  • the sleeve prevents the removable piece from falling off during a procedure, and the reduced diameter portion prevents misinstallation of the pin-carrying member.
  • the present invention may be utilized with a smaller incision than heretofore necessary, allows compression or distraction of the bone with minimal equipment, frees the hands of the surgeon to apply other fixation devices, and holds the bone firmly in proper position without encircling same until removed. Chances of soft tissue exposure and bone damage are minimized, thereby resulting in potentially less infection.

Landscapes

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

Abstract

Un outil chirurgical peut etre utilise soit pour la compression soit pour l'etirement d'un os fracture. L'outil comprend un axe filete (12) ayant une paire de tetes (14 et 70) fixees a chaque extremite de l'axe. Une courte goupille (80) fait saillie depuis l'une des tetes (70), de preference en faisant un angle en direction de ou en s'eloignant de l'autre tete (14). Un manchon filete interieurement (96) est monte sur l'arbre (12) entre les tetes (14 et 70) et comprend une bague (30) ayant une surface exterieure moletee pour permettre au manchon (96) d'etre regle manuellement dans les deux sens dans la longueur de l'axe filete (12). Un autre organe de support de goupille (36) est monte de maniere amovible autour du manchon (96) et possede une autre goupille courte (40) faisant saillie depuis une surface de celle-ci. Les deux goupilles sont positionnees dans des trous perces a l'avance de chaque cote d'un os fracture qui doit etre comprime ou etire. L'instrument chirurgical permet de limiter les dommages causes aux os ainsi que les risques d'infection car il implique une incision de taille reduite et permet aussi bien la compression et l'etirement a l'aide d'un outil large restreint tout en laissant les mains du chirurgien libres pour appliquer d'autres dispositifs de fixation sans encercler les parties osseuses fracturees.
EP19790900831 1979-07-09 1981-01-26 Dispositif de compression ou d'etirement des os Withdrawn EP0031809A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1979/000479 WO1981000048A1 (fr) 1979-07-09 1979-07-09 Dispositif de compression ou d'etirement des os

Publications (1)

Publication Number Publication Date
EP0031809A1 true EP0031809A1 (fr) 1981-07-15

Family

ID=22147627

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790900831 Withdrawn EP0031809A1 (fr) 1979-07-09 1981-01-26 Dispositif de compression ou d'etirement des os

Country Status (2)

Country Link
EP (1) EP0031809A1 (fr)
WO (1) WO1981000048A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL69888A0 (en) * 1983-10-03 1984-01-31 Avmedica Ltd Unilateral external fixation system for small bones
FR2720623B1 (fr) * 1994-06-03 1996-09-06 Implants Orthopediques Toutes Plaque d'ostéotomie d'ouverture.
FR2726755A1 (fr) * 1994-11-10 1996-05-15 Kehyayan Georges Dispositif de blocage temporaire de deux parties d'une piece osseuse
EP0773004A1 (fr) * 1995-11-07 1997-05-14 IMPLANTS ORTHOPEDIQUES TOUTES APPLICATIONS, S.A.R.L. dite: Plaque d'ostéotomie d'ouverture
CN109330719A (zh) * 2018-10-31 2019-02-15 浙江大学 一种自锁型骨支持抗回旋骨牵张器

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1217637A (en) * 1916-03-30 1917-02-27 Sharp & Smith Bone-setting device.
US1920821A (en) * 1931-09-22 1933-08-01 Wassenaar Jan Jacob Stephanus Distraction bone forceps
US2238870A (en) * 1939-02-04 1941-04-15 Herbert H Haynes Ambulatory splint
US2250417A (en) * 1939-12-02 1941-07-22 Zimmer Mfg Company Fracture reduction and retention device
US2251209A (en) * 1940-02-17 1941-07-29 Stader Otto Bone splint
US3244170A (en) * 1962-11-23 1966-04-05 Robert T Mcelvenny Compression type bone splint
US3604414A (en) * 1968-08-29 1971-09-14 Nicomedes Borges Bone setting device
US3709219A (en) * 1970-11-27 1973-01-09 W Halloran Bone compression device
US3862631A (en) * 1973-05-16 1975-01-28 Down Bros Surgical implants
US3900025A (en) * 1974-04-24 1975-08-19 Jr Walter P Barnes Apparatus for distracting or compressing longitudinal bone segments

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8100048A1 *

Also Published As

Publication number Publication date
WO1981000048A1 (fr) 1981-01-22

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