EP1401344A2 - Device for the proximal locking of a femoral nail - Google Patents
Device for the proximal locking of a femoral nailInfo
- Publication number
- EP1401344A2 EP1401344A2 EP02740589A EP02740589A EP1401344A2 EP 1401344 A2 EP1401344 A2 EP 1401344A2 EP 02740589 A EP02740589 A EP 02740589A EP 02740589 A EP02740589 A EP 02740589A EP 1401344 A2 EP1401344 A2 EP 1401344A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- bell
- transcervical
- nail
- longitudinal element
- pin
- 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- Withdrawn
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
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/74—Devices for the head or neck or trochanter of the femur
- A61B17/742—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck
- A61B17/744—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck the longitudinal elements coupled to an intramedullary nail
Definitions
- the present invention relates to a device for locking an intrameduUary nail for osteosynthesis of fractures in the trochanteric region of the femur.
- IntrameduUary nails such as those of interest according to the present invention are for example described in DE-A-2854334 and EP- 257118.
- one of the main problems in this kind of implant consists of the stability together with capacity of the osteosynthesis means to adapt to the evolution of the fracture site.
- the fracture fissures in the trochanteric region of the femur, in particular the neck of the femur, once the implant has been performed must be able to be suitably compressed under the effect of the static or dynamic load, in a controlled manner within and not beyond predetermined critical values.
- the present invention proposes a device for the proximal locking of an intrameduUary nail for osteosynthesis of fractures in the trochanteric region of the femur, said nail being provided with a transverse through-hole, characterized in that it comprises a transcervical longitudinal element self-threading at one end for fixing to the head of the femur and provided at the other end with an opening for receiving an insertion instrument which performs a translational movement thereof inside a bell which can be stably positioned inside said transverse hole of said nail, during said translation a rotation of said transcervical longitudinal element inside said bell being prevented, said translation being able to occur between two opposite stop positions, at least one of which is determined by the bearing contact of a pin which extends integrally from the internal surface of said bell into a slot formed on the surface of said transcervical longitudinal element.
- Figures 1 , 2 and 3 show corresponding cross-sectional schematic views of a device according to the invention applied to an intrameduUary nail in a corresponding number of different operating positions;
- Figure 4 shows a sectional view of the device only along the line IV-
- Fig. 5 shows a sectional view, similar to that of Fig. 4, of a variant of the device according to the invention
- Fig. 6 shows a sectional schematic view, similar to that of Fig. 1 , of a further variant of the device.
- a device 10 comprises a self-threading, transcervical, longitudinal (relative to the vertical axis of the device) element 11 , with a wide threading at the end 12 for fixing to the head of the femur.
- the element 11 In an intermediate zone of its external surface the element
- Said element 11 has a slot 9.
- Said element 11 has - in accordance with the embodiment shown by way of example in Figs. 1 , 2 and 3 - a cylindrical mixtilinear cross-section cut by a pair of planes, as shown in Fig. 4, but may equally have a different cross-section with edges, for example a square or hexagonal cross-section as shown in the variant of Fig. 5, thus preventing in any case its rotation inside the element which receives it, the internal surface of latter being in fact shaped in a matching manner, as can be seen in Figs. 4 and 5.
- Said element consists of a bell 15, the cross-section of which is narrower at 17 at the opposite end to the threaded end 12 of the transcervical element 11 which it contains, this narrowed section 17 thus forming an stop stop for the transcervical element 11 which is free to move inside the bell.
- an opening 13 with a narrowed cross-section for receiving an insertion instrument, of which in Figs. 1 and 2 for the sake of brevity only the end 14 having a shape matching the opening 13 is shown.
- the external surface of the bell is tapered at 16, while in an intermediate position 18 it is threaded or corrugated or knurled with a series of recesses and/or projections.
- a pin 8 extends integrally from the internal surface of said bell so as to engage with said slot.
- the element 11 is thus able to translate without rotation inside the bell 15 between two opposite stop positions defined in the example of Figs. 1-3 by the bearing contact of the pin 8 against the opposite edges of the slot 9.
- All the components described are made of biocompatible materials, for example stainless steel.
- said device 10 comprising the bell 15 and the transcervical longitudinal element 11 is inserted inside a transverse through-hole 19 of an intrameduUary nail 20 for osteosynthesis of fractures in the trochanteric region of the femur, using the surgical technique normally adopted for this kind of femoral nail.
- the nail in question has a cavity 21 along its longitudinal axis, which is threaded at 25 at the top with respect to the said transverse through-hole 19, for receiving a means 22 for clamping the device 10, for example a threaded pin terminating at the bottom in a frustoconical/cylindrical section 23 which creates with its edge a notch able to interfere with the said threading 18 formed on the external surface of the bell 15 so as to lock it on the intrameduUary nail 20.
- a means 22 for clamping the device 10 for example a threaded pin terminating at the bottom in a frustoconical/cylindrical section 23 which creates with its edge a notch able to interfere with the said threading 18 formed on the external surface of the bell 15 so as to lock it on the intrameduUary nail 20.
- the device 10 is introduced into the transcervical channel, for example by means of a positioning cannula, passing through the transverse hole 19 of the nail as shown in Fig. 1.
- the element 11 is displaced inside the bell 10 until the pin 8 makes bearing contact against the edge of the slot 9 in the position again shown in Fig. 1.
- the end of the element 11 is located at the maximum distance from the stop represented by the section 17 of the bell.
- the distance indicated by 24 represents the maximum working stroke which the transcervical element 11 is able to perform under compression, for example as a result of the static or dynamic load exerted on the femur of the patient in whom the nail has been implanted, and therefore on the fissures of the fracture.
- Fig. 3 shows the other limit position of displacement of the element 11 inside the bell as far as the stop position represented by the bearing contact of the end of 11 against the section 17 of the bell, corresponding in the example shown to the bearing contact of the other end of the slot 9 against the pin 8.
- the situation shown in Fig. 3 therefore represents the situation of maximum compression permitted on the fracture fissures by the device according to the invention.
- a means for example a spring 26, for opposing the pressure exerted by the static or dynamic load on the fracture fissures, thus acting as a damping device, has been arranged between the bottom end of the element 11 and the narrowed section 17 which acts as the base of the bell 15.
- a rigid means for preventing or limiting the compression stroke such as for example a screw or a stopper or a plug. This may be appropriate in certain clinical cases where it is not desired to use the whole compression (working stroke 24 shown in Fig. 2) made available by the device according to the invention.
- the characteristic feature of preventing rotation between the transcervical element and bell may be provided solely by the same pin of the bell which engages with the slot of the transcervical element and not by the particular anti-rotational geometry of their sections.
- the cross-section of the displaceable transcervical element/bell pair will therefore be circular.
- the same pin/slot pair could moreover provide itself both the opposite stop positions described above without using narrowed sections of the bell acting as a stop surface for the base of the transcervical element.
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)
- Neurology (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
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI20011175 | 2001-06-04 | ||
IT2001MI001175A ITMI20011175A1 (en) | 2001-06-04 | 2001-06-04 | PROXIMAL LOCKING DEVICE FOR A FEMORAL NAIL |
PCT/EP2002/005235 WO2002098330A2 (en) | 2001-06-04 | 2002-05-13 | Device for the proximal locking of a femoral nail |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1401344A2 true EP1401344A2 (en) | 2004-03-31 |
Family
ID=11447804
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02740589A Withdrawn EP1401344A2 (en) | 2001-06-04 | 2002-05-13 | Device for the proximal locking of a femoral nail |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1401344A2 (en) |
AU (1) | AU2002314058A1 (en) |
IT (1) | ITMI20011175A1 (en) |
WO (1) | WO2002098330A2 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7601153B2 (en) | 2003-12-25 | 2009-10-13 | Homs Engineering Inc. | Intramedullary nail |
US7956235B2 (en) | 2004-12-29 | 2011-06-07 | Kimberly-Clark Worldwide, Inc. | Absorbent article featuring a temperature change member |
DE102005039854B4 (en) * | 2005-08-23 | 2007-07-12 | Königsee Implantate und Instrumente zur Osteosynthese GmbH | Proximal femoral nail |
WO2008064059A2 (en) * | 2006-11-17 | 2008-05-29 | Synthes(U.S.A.) | Sliding hip helical implant |
US9295504B2 (en) | 2009-03-31 | 2016-03-29 | Biomet C.V. | Intramedullary nail with locking key |
RU2601982C2 (en) | 2011-01-21 | 2016-11-10 | Зинтес Гмбх | Augmentable trochanteric femoral nail |
CN103402447B (en) | 2011-02-08 | 2016-08-24 | 史赛克创伤有限公司 | For the implant system that bone is fixing |
US9517094B1 (en) * | 2014-05-09 | 2016-12-13 | Savage Medical Design LLC | Intramedullary fixation apparatus for use in hip and femur fracture surgery |
EP3300479B1 (en) * | 2015-06-09 | 2020-12-09 | Savage Medical Design LLC | An intramedullary fixation apparatus and system for use in hip and femur fracture surgery |
US9895177B2 (en) * | 2016-01-15 | 2018-02-20 | ARTHREX, GmbH | Bone fixation device for treatment of femoral fractures |
JP6434477B2 (en) * | 2016-12-08 | 2018-12-05 | 株式会社ホムズ技研 | Intramedullary fixation system |
WO2021176272A1 (en) | 2020-03-06 | 2021-09-10 | Stryker European Operations Limited | Set screw for femoral nail |
WO2021242211A1 (en) * | 2020-05-28 | 2021-12-02 | Андрей Николаевич КОВАЛЕВ | Telescopic intramedullary fixation device (variants) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8620399U1 (en) * | 1986-07-30 | 1986-10-09 | Howmedica GmbH Werk Schönkirchen, 2314 Schönkirchen | Osteosynthesis aids for the treatment of subtrochanteric fractures |
US5514138A (en) * | 1991-02-08 | 1996-05-07 | Pfizer Inc. | Connector having a stop member |
GB9113578D0 (en) * | 1991-06-24 | 1991-08-14 | Howmedica | Intramedullary intertrochanteric fracture fixation appliance |
JPH08322848A (en) * | 1995-06-01 | 1996-12-10 | Masato Narushima | Screw device for fixing bone fracture part |
JPH0966061A (en) * | 1995-08-31 | 1997-03-11 | Mizuho Ika Kogyo Kk | Intramedullary nail |
US6235031B1 (en) * | 2000-02-04 | 2001-05-22 | Encore Medical Corporation | Intramedullary fracture fixation device |
-
2001
- 2001-06-04 IT IT2001MI001175A patent/ITMI20011175A1/en unknown
-
2002
- 2002-05-13 WO PCT/EP2002/005235 patent/WO2002098330A2/en not_active Application Discontinuation
- 2002-05-13 AU AU2002314058A patent/AU2002314058A1/en not_active Abandoned
- 2002-05-13 EP EP02740589A patent/EP1401344A2/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO02098330A3 * |
Also Published As
Publication number | Publication date |
---|---|
ITMI20011175A1 (en) | 2002-12-04 |
AU2002314058A1 (en) | 2002-12-16 |
WO2002098330A3 (en) | 2003-04-24 |
WO2002098330A2 (en) | 2002-12-12 |
ITMI20011175A0 (en) | 2001-06-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20040102 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
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AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
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17Q | First examination report despatched |
Effective date: 20061229 |
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GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: A61B 17/78 20060101ALI20070530BHEP Ipc: A61B 17/74 20060101AFI20070530BHEP |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20071031 |