CA2210003A1 - Device for stabilizing joints of the limbs - Google Patents
Device for stabilizing joints of the limbsInfo
- Publication number
- CA2210003A1 CA2210003A1 CA002210003A CA2210003A CA2210003A1 CA 2210003 A1 CA2210003 A1 CA 2210003A1 CA 002210003 A CA002210003 A CA 002210003A CA 2210003 A CA2210003 A CA 2210003A CA 2210003 A1 CA2210003 A1 CA 2210003A1
- Authority
- CA
- Canada
- Prior art keywords
- shaft
- hinge
- indentations
- protrusions
- elements
- 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.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
- A61F5/01—Orthopaedic devices, e.g. splints, casts or braces
- A61F5/04—Devices for stretching or reducing fractured limbs; Devices for distractions; Splints
- A61F5/05—Devices for stretching or reducing fractured limbs; Devices for distractions; Splints for immobilising
- A61F5/058—Splints
- A61F5/05841—Splints for the limbs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
- A61F5/01—Orthopaedic devices, e.g. splints, casts or braces
- A61F5/0102—Orthopaedic devices, e.g. splints, casts or braces specially adapted for correcting deformities of the limbs or for supporting them; Ortheses, e.g. with articulations
- A61F2005/0132—Additional features of the articulation
- A61F2005/0158—Additional features of the articulation with locking means
Abstract
The device according to the invention is comprising two rods to be secured to the limb, said rods being connected by a hinge consisting of two elements arranged on a common shaft and a locking element. The mating faces of the hinge elements (4, 5) are provided with perpendicular protrusions and indentations, respectively, wherein the indentations are of the same shape as the protrusions and the contours of both the protrusions and the indentations are other than rings coaxial with the shaft (6); one of the hinge elements (4) is arranged on the shaft (6) to rotate freely, the other hinge element (5) is fitted onto an outer thread on said shaft (6), meanwhile the locking element is firmly anchored on the shaft (6).
Description
DEVICE FOR STABIL~ZING JOINTS OF THE LIMBS
The present invention relates to a device for stabilizing joints of the s limbs, consisting of supporting rods attached to the limbs, a hinge between the rods, two coaxi~l hinge elements and a locking element.
Under a number of conditions there is a need to stabilize a joint of the limbs. Often following illness or surgery the joints connecting the limbs cannot be stressed sufficiently. In other cases following surgery, involving amputation of the limbs, the connection of the prostheses must be constructed to produce a movement similar to that of the original joint of the limb. In both cases the device is constructed - with the recovery of the patient in mind so, that when needed (for instance when sitting down), adjustment of the joint is possible, meanwhile giving ample support to the limb when fastened.
These devices are most commonly constructed so that two rods are joined with a so called latchjoint or hinge, making it possible for the two rods to be fixated in a given position. The latchjoint is constructed in a way, that an element of the latch, which is connected to one part of the joint, can be inserted into a slot of the other part of the joint so that it canbe fixated in a given position. The latch can be disconnected by pulling the latch, which is secured by a spring, out of the slot, thus making movement of the joints possible.
The described system, called the Hessing apparatus, is still used today as an improvement of the so called Hoffa-band [dr. Gyula Dollinger:
r "Inflammation, rigidity and shrinkage of the hip joints" ( pages 60-62)].
Another common method is described by 1994-95 catalogue of the German - Otto Bock orthopaedic and aid-device manufacturer. The apparatus shown on th0 48th page has the rods stabilizing the paralysed limb, connected by a hinge. Relative movement of the joint is controlled by a arm that inserts for stabalization, or removes for movement a wedge.
The described systems share a common problem: they do not offer an entirely satisfying degree of safety. This way the users, people already greatly hindered in their movement, are even more prone to injury.
Another great drawback is, I~ec~ ~se the devices are machined or precision cast from metal, that they are heavy and have a very small supporting area, thus wearing-out very quickly. Due to the wear they also become even less safe.
o The object of the present invention is to eliminate the mentioned problems and to provide a simple, safe and wear resistant design which can stabilize the injured or healing joints.
Accordingly, the invention is a device comprising two rods to be secured to the limb, said rods being connected by a hinge consisting of two 15 elements arranged on a common shaft and a locking element, wherein the mating faces of the hinge elements are provided with perpendicular protrusions and indentations, respectively. The indentations are of the same shape as the protrusions and the contours of both the protrusions and the indentations are other than rings coaxial with the shaft; one of the 20 hinge elements is arranged on the shaft to rotate freely, the other hinge element is fitted onto an outer thread on said shaft, meanwhile the locking element is firmly anchored on the shaft.
The hinge elements are preferably discs, wherein the protrusions on one disc are trapezoid shaped parallel ribs, while the indentations on the 25 other disc are grooves of the same shape and arrangement.
The discs may be of circular shape and made of plastics and the shaft may be made of metal.
Preferably, the locking element is a lever and the shaft is provided with a multiple coarse pitch square thread.
WO 96/22749 PCT/HU~
With this device, one of the hinge elements can be moved from the other one by way of the locking element, so that there is a distance between the elements that usually are in contact with each other this way ensuring independent movement of the two elements.
When the elements are moved again to contact each other, they can not rotate with respect to each other as the protrusions and the indentations are mating each other.
The basis for the invention is the fact that the moving parts of the device are put out to a lot less stress if the fixation isn't done on the small o peripherial surfaces of the elements, but on the larger area of the front surfaces. Accordingly, locking does not occure in a radial direction but in a plane perpendicular thereof. This design not only reduces the stress and thus the wear to the joints, but makes the device a lot safer in the locked position, and it's use easier. The chances of accidents are minimalized, which is crucial in serving it's purpose.
The details of the invention are shown in the accompanying drawings, in which:
Fig. 1 is a perspective view of the device;
Fig. 2 is a perspective view of the hinge;
Fig. 3 is a cross section of the fastened joint illustrated in Figure 2 and Fig. 4 is a cross section of the hinge illustrated in figure 3, in a position the elements can rotate.
Figure 1 shows the device in use, fastened to a limb. The rods 1 are 2~ fastened to the limb 2 above and below the knee of the user and are connected by hinge 3. The hinge 3 is locked in the shown position, thus the rods 1 and hinge 3 create a single rigid unit.
Figure 2 shows the midsection of the device consisting of the hinge 3 with elements 4 and 5 and a shaft 6 with a lever 7 as locking element.
WO ~6/22749 PCT/HIJ~GJ'O~
Figures 3 and 4 show the details of the trapezoid shaped mateble ribs 8 and slots 9 of the hinge elements 4 and 5, respectively. The ribs 8 and grooves 9 that run across the mating faces of the hinge elements 4 and 5 are parallel with the diameter of the hinge elements.
5 Hinge element 4 is fitted onto the shaft 6 so it can rotate freely and is supported by rim 10.
The central bore in hinge element 5 is threaded corresponding to the outer thread of shaff 6. This way when lever 7 is tumed, element 4 ca recess and the mating grooves 9 and ribs 8 prevent possible rotation of lO the hinge elements.
Shaft 6 is preferably provided with a multiple coarse pitch square thread.
This way hinge element 5 can recess, by a slight tum of lever 7, from the other hinge element 4. At this time the rods 1 can move freely, and the leg shown on Figure 1 can be bent in order to sit down.
Hinge elements 4 and 5 of the joint can mate, in a similar way, by turning the lever 7 in the opposite direction.
Naturally, the present invention may be applied in many different ways and the scope of the invention is not to be taken as limited by the description of the above preferred specific device. It is obvious that the 20 locking lever can be substituted by a dial or any other structural element.
The joints do not have to consist of discs, grooves and ribs, but other connecting configurations my also be used. The threaded shaft can also be manufactured as a seperate unit.
The present invention relates to a device for stabilizing joints of the s limbs, consisting of supporting rods attached to the limbs, a hinge between the rods, two coaxi~l hinge elements and a locking element.
Under a number of conditions there is a need to stabilize a joint of the limbs. Often following illness or surgery the joints connecting the limbs cannot be stressed sufficiently. In other cases following surgery, involving amputation of the limbs, the connection of the prostheses must be constructed to produce a movement similar to that of the original joint of the limb. In both cases the device is constructed - with the recovery of the patient in mind so, that when needed (for instance when sitting down), adjustment of the joint is possible, meanwhile giving ample support to the limb when fastened.
These devices are most commonly constructed so that two rods are joined with a so called latchjoint or hinge, making it possible for the two rods to be fixated in a given position. The latchjoint is constructed in a way, that an element of the latch, which is connected to one part of the joint, can be inserted into a slot of the other part of the joint so that it canbe fixated in a given position. The latch can be disconnected by pulling the latch, which is secured by a spring, out of the slot, thus making movement of the joints possible.
The described system, called the Hessing apparatus, is still used today as an improvement of the so called Hoffa-band [dr. Gyula Dollinger:
r "Inflammation, rigidity and shrinkage of the hip joints" ( pages 60-62)].
Another common method is described by 1994-95 catalogue of the German - Otto Bock orthopaedic and aid-device manufacturer. The apparatus shown on th0 48th page has the rods stabilizing the paralysed limb, connected by a hinge. Relative movement of the joint is controlled by a arm that inserts for stabalization, or removes for movement a wedge.
The described systems share a common problem: they do not offer an entirely satisfying degree of safety. This way the users, people already greatly hindered in their movement, are even more prone to injury.
Another great drawback is, I~ec~ ~se the devices are machined or precision cast from metal, that they are heavy and have a very small supporting area, thus wearing-out very quickly. Due to the wear they also become even less safe.
o The object of the present invention is to eliminate the mentioned problems and to provide a simple, safe and wear resistant design which can stabilize the injured or healing joints.
Accordingly, the invention is a device comprising two rods to be secured to the limb, said rods being connected by a hinge consisting of two 15 elements arranged on a common shaft and a locking element, wherein the mating faces of the hinge elements are provided with perpendicular protrusions and indentations, respectively. The indentations are of the same shape as the protrusions and the contours of both the protrusions and the indentations are other than rings coaxial with the shaft; one of the 20 hinge elements is arranged on the shaft to rotate freely, the other hinge element is fitted onto an outer thread on said shaft, meanwhile the locking element is firmly anchored on the shaft.
The hinge elements are preferably discs, wherein the protrusions on one disc are trapezoid shaped parallel ribs, while the indentations on the 25 other disc are grooves of the same shape and arrangement.
The discs may be of circular shape and made of plastics and the shaft may be made of metal.
Preferably, the locking element is a lever and the shaft is provided with a multiple coarse pitch square thread.
WO 96/22749 PCT/HU~
With this device, one of the hinge elements can be moved from the other one by way of the locking element, so that there is a distance between the elements that usually are in contact with each other this way ensuring independent movement of the two elements.
When the elements are moved again to contact each other, they can not rotate with respect to each other as the protrusions and the indentations are mating each other.
The basis for the invention is the fact that the moving parts of the device are put out to a lot less stress if the fixation isn't done on the small o peripherial surfaces of the elements, but on the larger area of the front surfaces. Accordingly, locking does not occure in a radial direction but in a plane perpendicular thereof. This design not only reduces the stress and thus the wear to the joints, but makes the device a lot safer in the locked position, and it's use easier. The chances of accidents are minimalized, which is crucial in serving it's purpose.
The details of the invention are shown in the accompanying drawings, in which:
Fig. 1 is a perspective view of the device;
Fig. 2 is a perspective view of the hinge;
Fig. 3 is a cross section of the fastened joint illustrated in Figure 2 and Fig. 4 is a cross section of the hinge illustrated in figure 3, in a position the elements can rotate.
Figure 1 shows the device in use, fastened to a limb. The rods 1 are 2~ fastened to the limb 2 above and below the knee of the user and are connected by hinge 3. The hinge 3 is locked in the shown position, thus the rods 1 and hinge 3 create a single rigid unit.
Figure 2 shows the midsection of the device consisting of the hinge 3 with elements 4 and 5 and a shaft 6 with a lever 7 as locking element.
WO ~6/22749 PCT/HIJ~GJ'O~
Figures 3 and 4 show the details of the trapezoid shaped mateble ribs 8 and slots 9 of the hinge elements 4 and 5, respectively. The ribs 8 and grooves 9 that run across the mating faces of the hinge elements 4 and 5 are parallel with the diameter of the hinge elements.
5 Hinge element 4 is fitted onto the shaft 6 so it can rotate freely and is supported by rim 10.
The central bore in hinge element 5 is threaded corresponding to the outer thread of shaff 6. This way when lever 7 is tumed, element 4 ca recess and the mating grooves 9 and ribs 8 prevent possible rotation of lO the hinge elements.
Shaft 6 is preferably provided with a multiple coarse pitch square thread.
This way hinge element 5 can recess, by a slight tum of lever 7, from the other hinge element 4. At this time the rods 1 can move freely, and the leg shown on Figure 1 can be bent in order to sit down.
Hinge elements 4 and 5 of the joint can mate, in a similar way, by turning the lever 7 in the opposite direction.
Naturally, the present invention may be applied in many different ways and the scope of the invention is not to be taken as limited by the description of the above preferred specific device. It is obvious that the 20 locking lever can be substituted by a dial or any other structural element.
The joints do not have to consist of discs, grooves and ribs, but other connecting configurations my also be used. The threaded shaft can also be manufactured as a seperate unit.
Claims (7)
1. Device for supporting the joints of limbs, comprising two rods to be secured to the limb, said rods being connected by a hinge consisting of two elements arranged on a common shaft and a locking element, wherein the mating faces of the hinge elements are provided with perpendicular protrusions and indentations, respectively, the indentations are of the same shape as the protrusions and the contours of both the protrusions and the indentations are other than rings coaxial with the shaft, characterized in that the protrusions and indentations are parallel ribs (8) and grooves (9), respectively and one of the hinge elements (4) is arranged on the shaft (6) to rotate freely, the other hinge element (5) is fitted onto an outer thread on said shaft (6), meanwhile the locking element is firmly anchored on the shaft (6).
2. The device as claimed in claim 1. characterized in that the hinge elements (4, 5) are discs, wherein the parallel ribs (8) on one disc and the parallel grooves (9) on the other disc have trapezoid shaped cross sections.
3. The device as claimed in claim 2, characterized in that the discs are of circular shape and made of plastic.
4. The device as claimed in any of claims 1-3 characterized in that the shaft (6) is made of metal.
5. The device as claimed in any of claims 1-4 characterized in that the locking element is a lever (7).
6. The device as claimed in any of claims 1-5 characterized in that the shaft (6) is provided with a multiple coarse pitch thread.
7. The device as claimed in claim 6, caracterized in that the thread is a square thread.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HUP9500207 | 1995-01-24 | ||
| HU9500207A HU215016B (en) | 1995-01-24 | 1995-01-24 | Fixating device for diarthrosis of limbs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2210003A1 true CA2210003A1 (en) | 1996-08-01 |
Family
ID=10986191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002210003A Abandoned CA2210003A1 (en) | 1995-01-24 | 1996-01-24 | Device for stabilizing joints of the limbs |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5823979A (en) |
| EP (1) | EP0805660A1 (en) |
| AU (1) | AU4494896A (en) |
| CA (1) | CA2210003A1 (en) |
| HU (1) | HU215016B (en) |
| WO (1) | WO1996022749A1 (en) |
Families Citing this family (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2004212942A1 (en) | 2003-02-14 | 2004-09-02 | Depuy Spine, Inc. | In-situ formed intervertebral fusion device |
| US7670375B2 (en) | 2005-08-16 | 2010-03-02 | Benvenue Medical, Inc. | Methods for limiting the movement of material introduced between layers of spinal tissue |
| US8366773B2 (en) * | 2005-08-16 | 2013-02-05 | Benvenue Medical, Inc. | Apparatus and method for treating bone |
| US8105382B2 (en) | 2006-12-07 | 2012-01-31 | Interventional Spine, Inc. | Intervertebral implant |
| CA2678006C (en) | 2007-02-21 | 2014-10-14 | Benvenue Medical, Inc. | Devices for treating the spine |
| EP2124777A4 (en) | 2007-02-21 | 2013-06-05 | Benvenue Medical Inc | Devices for treating the spine |
| US8900307B2 (en) | 2007-06-26 | 2014-12-02 | DePuy Synthes Products, LLC | Highly lordosed fusion cage |
| EP2471493A1 (en) | 2008-01-17 | 2012-07-04 | Synthes GmbH | An expandable intervertebral implant and associated method of manufacturing the same |
| BRPI0910325A8 (en) | 2008-04-05 | 2019-01-29 | Synthes Gmbh | expandable intervertebral implant |
| US8535327B2 (en) | 2009-03-17 | 2013-09-17 | Benvenue Medical, Inc. | Delivery apparatus for use with implantable medical devices |
| US9526620B2 (en) | 2009-03-30 | 2016-12-27 | DePuy Synthes Products, Inc. | Zero profile spinal fusion cage |
| US9393129B2 (en) | 2009-12-10 | 2016-07-19 | DePuy Synthes Products, Inc. | Bellows-like expandable interbody fusion cage |
| US9282979B2 (en) | 2010-06-24 | 2016-03-15 | DePuy Synthes Products, Inc. | Instruments and methods for non-parallel disc space preparation |
| US8979860B2 (en) | 2010-06-24 | 2015-03-17 | DePuy Synthes Products. LLC | Enhanced cage insertion device |
| EP2588034B1 (en) | 2010-06-29 | 2018-01-03 | Synthes GmbH | Distractible intervertebral implant |
| US9402732B2 (en) | 2010-10-11 | 2016-08-02 | DePuy Synthes Products, Inc. | Expandable interspinous process spacer implant |
| GB201214574D0 (en) * | 2012-08-15 | 2012-09-26 | Canard Design Ltd | A medical device |
| US9522070B2 (en) | 2013-03-07 | 2016-12-20 | Interventional Spine, Inc. | Intervertebral implant |
| US10085783B2 (en) | 2013-03-14 | 2018-10-02 | Izi Medical Products, Llc | Devices and methods for treating bone tissue |
| US10034783B1 (en) * | 2013-12-17 | 2018-07-31 | University Of South Florida | Adjustable prosthetic ankles |
| US11426290B2 (en) | 2015-03-06 | 2022-08-30 | DePuy Synthes Products, Inc. | Expandable intervertebral implant, system, kit and method |
| US11510788B2 (en) | 2016-06-28 | 2022-11-29 | Eit Emerging Implant Technologies Gmbh | Expandable, angularly adjustable intervertebral cages |
| US11596522B2 (en) | 2016-06-28 | 2023-03-07 | Eit Emerging Implant Technologies Gmbh | Expandable and angularly adjustable intervertebral cages with articulating joint |
| US10888433B2 (en) | 2016-12-14 | 2021-01-12 | DePuy Synthes Products, Inc. | Intervertebral implant inserter and related methods |
| US10398563B2 (en) | 2017-05-08 | 2019-09-03 | Medos International Sarl | Expandable cage |
| US11344424B2 (en) | 2017-06-14 | 2022-05-31 | Medos International Sarl | Expandable intervertebral implant and related methods |
| US10940016B2 (en) | 2017-07-05 | 2021-03-09 | Medos International Sarl | Expandable intervertebral fusion cage |
| US11446156B2 (en) | 2018-10-25 | 2022-09-20 | Medos International Sarl | Expandable intervertebral implant, inserter instrument, and related methods |
| US11426286B2 (en) | 2020-03-06 | 2022-08-30 | Eit Emerging Implant Technologies Gmbh | Expandable intervertebral implant |
| US11850160B2 (en) | 2021-03-26 | 2023-12-26 | Medos International Sarl | Expandable lordotic intervertebral fusion cage |
| US11752009B2 (en) | 2021-04-06 | 2023-09-12 | Medos International Sarl | Expandable intervertebral fusion cage |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2545843A (en) * | 1949-08-30 | 1951-03-20 | Cohan Henry | Hinged joint for leg braces |
| SE357580B (en) * | 1972-08-22 | 1973-07-02 | Loennstroem Oy | |
| US4054130A (en) * | 1975-12-29 | 1977-10-18 | Paul William Franke | Emergency splint assembly |
| US4848326A (en) * | 1988-06-20 | 1989-07-18 | Robert Lonardo | Knee contracture correction device |
-
1995
- 1995-01-24 HU HU9500207A patent/HU215016B/en not_active IP Right Cessation
-
1996
- 1996-01-24 WO PCT/HU1996/000004 patent/WO1996022749A1/en not_active Application Discontinuation
- 1996-01-24 CA CA002210003A patent/CA2210003A1/en not_active Abandoned
- 1996-01-24 US US08/875,626 patent/US5823979A/en not_active Expired - Fee Related
- 1996-01-24 AU AU44948/96A patent/AU4494896A/en not_active Abandoned
- 1996-01-24 EP EP96901084A patent/EP0805660A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US5823979A (en) | 1998-10-20 |
| EP0805660A1 (en) | 1997-11-12 |
| HUT74551A (en) | 1997-01-28 |
| WO1996022749A1 (en) | 1996-08-01 |
| HU9500207D0 (en) | 1995-03-28 |
| HU215016B (en) | 1998-08-28 |
| AU4494896A (en) | 1996-08-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |