WO1997049348A1 - Device for retaining support nails in bones of human beings and animals - Google Patents
Device for retaining support nails in bones of human beings and animals Download PDFInfo
- 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
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
A device (6) for retaining one or more support nails (5) introduced in fractured or otherwise injured bones (1) of human beings or animals includes a coil shaped member similar to a common tension spring with thinly spaced turns. The coil shaped member is designed to be threaded on the ends of the support nails (5) at the orifice for introduction (3) and a stop prevents the support nails (5) from protruding through the coil shaped member. The turns of the coil are preferably provided with a radially outwardly directed ridge or edge for cutting its own tap in the bone and the marrow when mounting the retaining device (6).
Description
DEVICE FOR RETAINING SUPPORT NAILS IN BONES OF HUMAN BEINGS AND ANIMALS.
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. Thus, 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.
To treat the wounds and the possible inflammation that is caused by the nail coming out, a new operation has to be performed to bring back the support nail or nails, including all costs, inconveniences and risks that are associated with such an operation.
In order to prevent the occurrence of such coming out of one or more support nails, it lies near at hand to in some way try to cover the orifice for introduction of the support nails. However, this is not that easy since it hitherto has not been possible to fasten any kind of cover in a simple and secure manner. Further
screwing or nailing in the shaft of the bone around the orifice for introduction of the nails may weaken the bone so that there is a risk that it may be broken.
In most cases 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.
The invention is described in detail in the following taken in conjunction with the attached drawings, wherein
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, and
Figure 2 is a radial projection of a device according to the invention.
Fig. 1 shows a bone 1 having a fracture 2. Through 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.
In order to retain the support nails 5 in desired position 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.
In Fig. 2 is shown 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. In the embodiment shown 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.
To keep the nail ends collected when more than one nail is used, and to prevent these from protruding through the retaining device 6 when it is screwed into the bone, 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.
With the present invention, the object stated by way of the introduction has been obtained.
Claims
1. A device (6) for retaining one ore more support nails (5) introduced in fractured or otherwise injured bones ( 1) of human beings and animals in order to, during the healing of said bones, support the pieces of bone in relation to each other, characterized in that the device comprises a coil shaped member, said member designed to enclose an end portion of the support nail or support nails (5) and designed to be screwed into an orifice (3) through the wall of the bone ( 1), through which the support nails (5) are introduced, and that a means is provided to prevent the support nail or nails (5) from passing through the coil shaped member.
2. The retaining device (6) of claim 1 , characterized in that said coil shaped member consists of a cylindrical wire spiral.
3. The retaining device (6) of claim 1 or 2, characterized in that the coil shaped member formed with an radially outwardly directed edge.
4. The retaining device (6) of any of claims 1 through 3, characterized in that the coil shaped member is flexible.
5. The retaining device (6) of any of claims 1 through 4, characterized in that the means to prevent the support nail or nails (5) from passing through the coil shaped member is constituted by an upward bend of one of the outer turns of the coil shaped member.
6. The retaining device (6) of any of claims 1 through 5, characterized in that a sleeve is provided around the outer ends of the support nails (5) and is received in the retaining device.
AMENDED CLAIMS
[received by the International Bureau on 24 October 1997 (24.10.97) ; original claims 1-6 replaced by amended claims 1 -5 ( 1 page) ]
1. A device (6) for retaining one ore more support nails (5) introduced into fractured or otherwise injured bones (1) of human beings and animals in order to, during the healing of said bones, support the pieces of bone in relation to each other, said device constituted by a member (6) designed to enclose an end portion of the support nail or support nails (5) and designed to be screwed into an orifice (3) through the wall of the bone (1), through which the support nails (5) are introduced, characterized in that said member (6) is coil shaped and flexible and comprises a stop to prevent the support nail or nails (5) from passing through the coil shaped member.
2. The retaining device (6) of claim 1, characterized in that said coil shaped member is constituted by a cylindrical wire spiral.
3. The retaining device (6) of claim 1 or 2, characterized in that the coil shaped member is formed with a radially outwardly directed edge.
4. The retaining device (6) of any of claims 1 through 3, characterized in that the stop that prevents the support nail or nails (5) from passing through the coil shaped member is constituted by a bend of one of the outermost turns of the coil shaped member.
5. The retaining device (6) of any of claims 1 through 4, characterized in that a sleeve is provided around the outer ends of the support nails (5) and is received in the retaining device.
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 (en) | 1996-06-26 | 1996-06-26 | Device for retention of support nails in the legs of humans and animals |
| SE9602532-5 | 1996-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1997049348A1 true WO1997049348A1 (en) | 1997-12-31 |
Family
ID=20403172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SE1997/001143 Ceased WO1997049348A1 (en) | 1996-06-26 | 1997-06-25 | Device for retaining support nails in bones of human beings and animals |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU3562697A (en) |
| SE (1) | SE506699C2 (en) |
| WO (1) | WO1997049348A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006066536A1 (en) * | 2004-12-23 | 2006-06-29 | Michael Zielsdorf | Intramedullary nail |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0408477A1 (en) * | 1989-07-10 | 1991-01-16 | Fixano Sa | Apparatus for superior end fixation of intramedullary nails used for the osteosynthesis of femoral, tibial and humeral fractures |
| WO1991009570A1 (en) * | 1989-12-27 | 1991-07-11 | Hardy Jean Marie | Centro-medullary nailing system for immobilizing a bone fracture |
| WO1992003979A1 (en) * | 1990-09-07 | 1992-03-19 | Mclaren Alexander C | Locking cap for medical implants |
| WO1996000530A1 (en) * | 1994-06-30 | 1996-01-11 | Spinetech, Inc. | Reversible bone screw lock |
-
1996
- 1996-06-26 SE SE9602532A patent/SE506699C2/en not_active IP Right Cessation
-
1997
- 1997-06-25 AU AU35626/97A patent/AU3562697A/en not_active Abandoned
- 1997-06-25 WO PCT/SE1997/001143 patent/WO1997049348A1/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0408477A1 (en) * | 1989-07-10 | 1991-01-16 | Fixano Sa | Apparatus for superior end fixation of intramedullary nails used for the osteosynthesis of femoral, tibial and humeral fractures |
| WO1991009570A1 (en) * | 1989-12-27 | 1991-07-11 | Hardy Jean Marie | Centro-medullary nailing system for immobilizing a bone fracture |
| WO1992003979A1 (en) * | 1990-09-07 | 1992-03-19 | Mclaren Alexander C | Locking cap for medical implants |
| WO1996000530A1 (en) * | 1994-06-30 | 1996-01-11 | Spinetech, Inc. | Reversible bone screw lock |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006066536A1 (en) * | 2004-12-23 | 2006-06-29 | Michael Zielsdorf | Intramedullary nail |
Also Published As
| Publication number | Publication date |
|---|---|
| SE506699C2 (en) | 1998-02-02 |
| SE9602532L (en) | 1997-12-27 |
| AU3562697A (en) | 1998-01-14 |
| SE9602532D0 (en) | 1996-06-26 |
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