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WO1997049348A1 - Dispositif de retenue de clous de soutien dans les os d'etres humains ou d'animaux - Google Patents

Dispositif de retenue de clous de soutien dans les os d'etres humains ou d'animaux Download PDF

Info

Publication number
WO1997049348A1
WO1997049348A1 PCT/SE1997/001143 SE9701143W WO9749348A1 WO 1997049348 A1 WO1997049348 A1 WO 1997049348A1 SE 9701143 W SE9701143 W SE 9701143W WO 9749348 A1 WO9749348 A1 WO 9749348A1
Authority
WO
WIPO (PCT)
Prior art keywords
nails
support
shaped member
coil shaped
retaining device
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.)
Ceased
Application number
PCT/SE1997/001143
Other languages
English (en)
Inventor
Hans Agrell
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
Priority to AU35626/97A priority Critical patent/AU3562697A/en
Publication of WO1997049348A1 publication Critical patent/WO1997049348A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72—Intramedullary devices, e.g. pins or nails
    • A61B17/7208—Flexible pins, e.g. ENDER pins
    • 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
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/685—Elements to be fitted on the end of screws or wires, e.g. protective caps
    • 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
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72—Intramedullary devices, e.g. pins or nails
    • A61B17/7216—Intramedullary devices, e.g. pins or nails for bone lengthening or compression
    • A61B17/7225—Intramedullary devices, e.g. pins or nails for bone lengthening or compression for bone compression
    • 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
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/869—Pins or screws or threaded wires; nuts therefor characterised by an open form, e.g. wire helix

Definitions

  • the present invention relates to a device for retaining support nails that primarily in fractured bones are introduced through an orifice in the leg into a position where they are extended past the fracture in order to support the pieces of bone in proper positions during the healing period.
  • Support nails of the present type which typically are so called “hacketal-nails", are introduced into a fractured bone through an orifice formed in the bone and are struck or otherwise forced through the bone marrow so they extend themselves past the broken area.
  • Such nails have an entirely supporting function, so that the bone during healing will maintain a shape as close as possible to the original shape.
  • the purpose of these nails is to prevent the bone from receiving an angular deviation in the fracture during the healing.
  • a problem with the use of such support nails is that during the healing of the fracture they at times tend to migrate back out of the orifice in the bone from which they where introduced. After the operation, during which the orifice for introducing the support nails has been opened and the support nails have been inserted in place, the skin is joined by stitching over this orifice. When the skin is healed it is then most irritating for the patient when one or more of the support nails begins to find their way out through the skin, especially as this can lead to wounds and inflammations.
  • the support nails need to be introduced from the side of the bone and then bent along with the bone and past the area of the fracture. After the introduction the nails must be present adjacent to the orifice so that they may be easily accessed during the future pulling out, and may accordingly not be introduced too far into the bone. At the same time they may not be too long so that they protrude out from the bone and may irritate the skin, as been described earlier, but they should preferably end within the wall thickness of the bone marrow. Since this relates to living tissue with its special properties it is, however, difficult to provide these nails with well adapted length since they may penetrate deeper than expected in some cases and shorter than expected in other cases.
  • the object of the present invention is to eliminate the problem mentioned above. This object is reached with a device according to the claims, wherein further the specific features of the invention are evident.
  • Figure 1 is a partly sectioned view of a fractured bone with support nails introduced past the broken area and retained in place with a device according to the invention
  • Figure 2 is a radial projection of a device according to the invention.
  • Fig. 1 shows a bone 1 having a fracture 2.
  • an orifice 3 that has been formed through the wall of the shaft of the bone into its marrow, a number of support nails 5 have been introduced through the bone 1 from the orifice 3 and a distance past the fracture 2. In some cases only one support nail 5 is utilized and in other cases several. That far the technique is conventional.
  • a retaining device 6 is screwed through the orifice 3 and into the marrow 4.
  • This device 6 is essentially tube shaped in such a way that the end portions of support nails 5 can be accommodated therein. Further, since it is flexible it can follow the nails 5 in their turning from the orifice 3.
  • a retaining device 6 which in this preferred embodiment is formed in the shape of a cylindrical coil, similar to a tension spring. One end is open, through which support nail or nails 5 are inserted, while the other is closed so that support nails 5 cannot protrude through the device 6, but only into it.
  • the closure is made by bending a part of the outer turn of the coil over the end opening.
  • This embodiment of enclosure provides, in addition to its ability to act as a stop for the nails 5, a grip for the tool with which the retaining device 6 will be screwed into a bone 1.
  • the turns of the coil are relatively thinly spaced and the radially outwardly directed portions have preferably cross sections that are sharpened or provided with an edge formed ridge.
  • the turns of the coil form a somewhat flexible tap that during the screwing into a bone 1 aids the retaining device 6 to cut its own tap in the bone 1 as well as in the marrow 4. There are, however, no obstacles against cutting a thread into the wall of the orifice 3 using a special tool, if this is necessary.
  • a tube shaped sleeve e. g. similar to a cartridge, can be threaded on the ends and then be inserted in the retaining device 6. This sleeve is prevented from forcing its way out of the retaining device with help of e. g. the bent outer turn of the coil as mentioned earlier.
  • the retaining device 6 is made of a material that in no way affects or is affected by the living tissue in the bone 1. Thus, suitable materials are certain metals and plastics. At the same time, the retaining device 6 is so flexible that it can be somewhat bent during the screwing into the bone 1 and thereby follow the turn of the support nails, so that these are not urged out of the position of introduction when the retaining device 6 is screwed into the bone 1.
  • Utilizing the coil shape gives an easy production, thereby contributing to a low cost for this, of a retaining device according to the invention, and does further give the necessary flexibility which is required on one hand to follow the bend of the support nails and on the other hand to adapt to a living tissue.

Landscapes

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

Abstract

L'invention concerne un dispositif (6) de retenue de clous de soutien (5) introduits dans des os fracturés ou blessés (1) d'êtres humains ou d'animaux. Ce dispositif comprend un élément de la forme d'un enroulement similaire à un ressort de tension ordinaire dont les spires sont légèrement espacées. Cet élément en forme d'enroulement est conçu pour être adapté sur les extrémités des clous de soutien (5) au niveau de leur orifice d'introduction (3) et une butée empêche ces clous (5) de faire saillie de l'élément en forme d'enroulement. Les spires de l'enroulement sont de préférence pourvues d'une nervure ou bord orienté radialement vers l'extérieur, ce qui permet au dispositif (6) de former son propre trou taraudé dans l'os et dans la moelle lors de sa fixation.
PCT/SE1997/001143 1996-06-26 1997-06-25 Dispositif de retenue de clous de soutien dans les os d'etres humains ou d'animaux Ceased WO1997049348A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU35626/97A AU3562697A (en) 1996-06-26 1997-06-25 Device for retaining support nails in bones of human beings and animals

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9602532A SE506699C2 (sv) 1996-06-26 1996-06-26 Anordning för kvarhållning av stödspikar i ben hos människor och djur
SE9602532-5 1996-06-26

Publications (1)

Publication Number Publication Date
WO1997049348A1 true WO1997049348A1 (fr) 1997-12-31

Family

ID=20403172

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1997/001143 Ceased WO1997049348A1 (fr) 1996-06-26 1997-06-25 Dispositif de retenue de clous de soutien dans les os d'etres humains ou d'animaux

Country Status (3)

Country Link
AU (1) AU3562697A (fr)
SE (1) SE506699C2 (fr)
WO (1) WO1997049348A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006066536A1 (fr) * 2004-12-23 2006-06-29 Michael Zielsdorf Clou centromedullaire

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0408477A1 (fr) * 1989-07-10 1991-01-16 Fixano Sa Dispositif de verrouillage supérieur des broches centromédullaires utilisées pour l'ostéosynthèse des fractures du fémur, du tibia et de l'humérus
WO1991009570A1 (fr) * 1989-12-27 1991-07-11 Hardy Jean Marie Systeme d'enclouage centro-medullaire pour immobiliser une fracture d'un os
WO1992003979A1 (fr) * 1990-09-07 1992-03-19 Mclaren Alexander C Capuchon de verrouillage pour implants medicaux
WO1996000530A1 (fr) * 1994-06-30 1996-01-11 Spinetech, Inc. Frein reversible de vis a os

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0408477A1 (fr) * 1989-07-10 1991-01-16 Fixano Sa Dispositif de verrouillage supérieur des broches centromédullaires utilisées pour l'ostéosynthèse des fractures du fémur, du tibia et de l'humérus
WO1991009570A1 (fr) * 1989-12-27 1991-07-11 Hardy Jean Marie Systeme d'enclouage centro-medullaire pour immobiliser une fracture d'un os
WO1992003979A1 (fr) * 1990-09-07 1992-03-19 Mclaren Alexander C Capuchon de verrouillage pour implants medicaux
WO1996000530A1 (fr) * 1994-06-30 1996-01-11 Spinetech, Inc. Frein reversible de vis a os

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006066536A1 (fr) * 2004-12-23 2006-06-29 Michael Zielsdorf Clou centromedullaire

Also Published As

Publication number Publication date
SE506699C2 (sv) 1998-02-02
SE9602532L (sv) 1997-12-27
AU3562697A (en) 1998-01-14
SE9602532D0 (sv) 1996-06-26

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