WO1996004870A1 - Medial collateral ligament brace - Google Patents

Medial collateral ligament brace Download PDF

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Publication number
WO1996004870A1
WO1996004870A1 PCT/CA1995/000471 CA9500471W WO9604870A1 WO 1996004870 A1 WO1996004870 A1 WO 1996004870A1 CA 9500471 W CA9500471 W CA 9500471W WO 9604870 A1 WO9604870 A1 WO 9604870A1
Authority
WO
WIPO (PCT)
Prior art keywords
knee
brace
strap
cuff
patient
Prior art date
Application number
PCT/CA1995/000471
Other languages
French (fr)
Inventor
Dean Alexander Taylor
Original Assignee
Generation Ii Orthotics Inc.
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 Generation Ii Orthotics Inc. filed Critical Generation Ii Orthotics Inc.
Priority to CA002172361A priority Critical patent/CA2172361C/en
Priority to AU31074/95A priority patent/AU3107495A/en
Publication of WO1996004870A1 publication Critical patent/WO1996004870A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/055—Protector fastening, e.g. on the human body
    • A41D13/0556—Protector fastening, e.g. on the human body with releasable fastening means
    • A41D13/0568—Protector fastening, e.g. on the human body with releasable fastening means with straps
    • 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
    • A61F5/0123—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 for the knees

Definitions

  • This invention relates to a knee brace.
  • the knee is located between the femur (or thigh bone) and tibia (or shin bone).
  • the knee is controlled by ligaments and cartilage. Contact between the femur and the tibia occurs across the cartilage and there are compartments or spaces at each side of the knee, the medial compartment on the inside of the knee and the lateral compartment on the outside.
  • the ligaments of knee can be damaged quite easily. Damage to the ligaments is common in a large number of athletic activities, perhaps particularly in football and skiing.
  • This ligament brace comprises a flexible sleeve, generally of neoprene, that fits over the knee and extends a substantial way up the femur and down the tibia.
  • a hinge with rigid limbs extending from the hinge.
  • the neoprene sleeve is reinforced with ribs that extend around the front of the tibia and back of the femur. These ribs act as anchoring points both for the limbs and for the straps that are used to tighten the brace to locate it on the patient. What is called a force strap is used to apply pressure over the medial femoral condyle.
  • a problem with this brace has been the movement of the force strap. In certain circumstances it can move up over the femoral condyle and, as a result, relaxes. When it does relax, it is, of course, not as effective as when it is properly tensioned.
  • the present invention solves this problem with medial collateral ligament braces and has proved to be strikingly effective in this regard.
  • Another ailment of the knee is uni-compartmental osteoarthritis which may occur in the medial or in the lateral compartment. With this ailment there is a mechanical malfunction of the knee. An uneven distribution of pressure occurs across the knee, causing excessive wear on the inside of the knee joint in medial compartmental osteoarthritis and on the outside in lateral compartmental osteoarthritis.
  • the knee brace useful in the above method typically includes relatively rigid cuffs, one to be received around the femur and one to be received around the tibia.
  • a hinge having rigid limbs extending from it, is attached by those limbs to the cuffs.
  • This brace generally is described and claimed in, for example, commonly owned United States Patent 5,302,169, issued April 12, 1994 and 3,902,482 issued September 2, 1975. These disclosures are specifically incorporated herein by reference.
  • the force strap location has been changed, if necessary, by altering the fastening points.
  • the strap can still move from its ideal position as defined above.
  • the present invention is useful in those cases where the strap moves.
  • the present invention is a knee brace having a force strap to extend, when worn by a patient, from a first anchor position on the brace, above the patient's knee, behind the knee, to a second anchor position on the brace, below the patient's knee, and is the improvement comprising a stabilizer for the strap to maintain the force strap in position over the patient's femoral condyle.
  • the invention is a brace for the treatment of medial collateral ligament injury and comprises a sleeve to be worn around the knee, upper and lower ribs, linked by a hinge member, and a force strap extending from a first anchor point on the upper rib to a second anchor point on the lower rib, a housing on the sleeve to receive the force strap and maintain the strap over the medial femoral condyle.
  • the invention is a brace for the treatment of uni-compartmental osteoarthritis and has a tibial cuff and a femoral cuff, linked by a hinge member, and straps to maintain the brace in position and in which the first anchor point is on the femoral cuff and the second anchor point on the tibial cuff, the stabilizer comprising a member extending from one cuff to the force strap. Desirably the member extends from the tibial cuff to the strap in this further aspect of the invention.
  • Figure 1 is a front view of a brace according to one aspect of the present invention.
  • Figure 2 is a front view of a second aspect of the invention.
  • Figure 1 shows a brace useful for the treatment of medial collateral ligament injury. It comprises a sleeve 10 with built-in relatively rigid ribs 12 of approximately semi-circular shape at the top and bottom. The upper rib extends behind the leg, the lower in front of the leg. The ends of the semi-circular ribs are attached by straps 14. There is a hinge 16 and members 18 extend from it. Such hinges are well known in the art, for example, from the US Patents 5,302,169 and 3,902,482 referred to above. There is a strap 20 which may be described as a force strap, which extends around the wearer's leg, from anchor points 21 on the ribs 12. The straps 14, 20 and 22 are engaged in eyelets 24 and are provided with hook and eye fasteners, for example those available under the trademark Velcro.
  • the sleeve 10 includes an opening 26 that generally fits over the knee cap of the wearer and assists in location of the sleeve 10 on the patient.
  • Force strap 20 extends from its first anchor point, above the knee, behind the knee to a second anchor point on the lower rib 12, below the patient's knee.
  • a stabilizer for the strap to maintain the force strap 20 precisely in position over the patient's femoral condyle over which the strap normally passes when properly adjusted.
  • that stabilizer comprises a housing 28 on the sleeve 10 that receives the strap 20, preventing it from moving upwardly or downwardly but keeping it firmly positioned over the medial femoral condyle.
  • the housing 28 may be a simple material pocket, firmly attached to the sleeve 10. It is desirably provided with part of a hook and eye attachment on its outer surface to engage the hook or eye fastener of the force strap.
  • FIG. 2 shows a knee brace that would typically be used for the alleviation of uni- compartmental osteoarthritis. But such a brace can be used in all aspects of knee support.
  • the brace 122 of Figure 2 has a hinge 124 having rigid limbs 126 and 128 extending from it.
  • Limb 126 is attached to an upper cuff 130 and limb 128 is attached to a lower cuff 132.
  • the upper cuff 130 is located above the knee and the lower cuff 132 below the knee.
  • the hinge 124 joining the cuffs is adjacent the knee and, more particularly, adjacent the compartment that has osteoarthritis.
  • Cross force strap 134 is pivotally anchored to the upper cuff at bracket 136 and extends around the knee to a pivotal connection to the lower cuff 132.
  • the bracket 136 has an opening through which the force strap 134 can extend.
  • the strap 134 is provided with hook and eye fasteners 139. This is desirable in these knee braces because these fasteners permit a wide range of adjustments.
  • Strap 134 is led through the bracket 136, back on itself, to be fastened to itself by the hook and pile fastener.
  • the upper cuff 130 includes a thigh strap 140 extending from anchor points 142 and, again, having a hook or pile fastener at one end to mate with a hook or pile anchor point on the upper cuff 130. In this way, the upper cuff 130 is securely attached to the thigh of a wearer. Beneath the knee the lower cuff 132 is attached by an upper strap 146 extending from a pivotal anchor point 148, around through attachment bracket 150 and back on itself, again using hook and pile fasteners.
  • a stabilizer typically in the form of a relatively rigid bar, extending from a pivotal anchor point on the cuff 132 upwardly to an anchor point on the force strap 134.
  • the brace of Figure 2 is attached to a patient precisely as described, for example, in the above US Patent 5,277,698.
  • a stabilizer 158 is located at the pivotal anchor points 160 and 162 and acts to maintain the force strap 134 precisely in the desired position, that is over the femoral condyle.
  • the location of the brace in the correct position is carried out in well known manner.
  • the location of the strap 134 which in certain difficult cases has been a problem with prior art braces, is no longer a problem as the stabilizer 158 ensures that the position of the strap 134 is, in effect, determined by the unvarying position of the lower cuff 132.
  • the strap 134 cannot rise over the femoral condyle and relax, as has happened in the prior art.
  • the present invention thus provides a simple, economical but effective method of ensuring that the force strap, which is an important aspect of the two braces, remains in the correct position.

Abstract

A knee brace having a force strap (20, 134) to extend, when worn by a patient, from a first anchor position (21, 136) on the brace, above the patient's knee, behind the knee to a second anchor position on the brace, below the patient's knee. The brace has a stabilizer (28, 158) for the strap (20, 134) to maintain the force strap (20, 134) in position over the patient's femoral condyle.

Description

MEDIAL COLLATERAL LIGAMENT BRACE
FIELD OF THE INVENTION This invention relates to a knee brace.
DESCRIPTION OF THE PRIOR ART The knee is located between the femur (or thigh bone) and tibia (or shin bone). The knee is controlled by ligaments and cartilage. Contact between the femur and the tibia occurs across the cartilage and there are compartments or spaces at each side of the knee, the medial compartment on the inside of the knee and the lateral compartment on the outside.
The ligaments of knee can be damaged quite easily. Damage to the ligaments is common in a large number of athletic activities, perhaps particularly in football and skiing.
Applicants have developed a knee brace that is useful for medial collateral ligament injury. This ligament brace comprises a flexible sleeve, generally of neoprene, that fits over the knee and extends a substantial way up the femur and down the tibia. There is a hinge with rigid limbs extending from the hinge. The neoprene sleeve is reinforced with ribs that extend around the front of the tibia and back of the femur. These ribs act as anchoring points both for the limbs and for the straps that are used to tighten the brace to locate it on the patient. What is called a force strap is used to apply pressure over the medial femoral condyle.
A problem with this brace has been the movement of the force strap. In certain circumstances it can move up over the femoral condyle and, as a result, relaxes. When it does relax, it is, of course, not as effective as when it is properly tensioned. The present invention solves this problem with medial collateral ligament braces and has proved to be strikingly effective in this regard.
Another ailment of the knee is uni-compartmental osteoarthritis which may occur in the medial or in the lateral compartment. With this ailment there is a mechanical malfunction of the knee. An uneven distribution of pressure occurs across the knee, causing excessive wear on the inside of the knee joint in medial compartmental osteoarthritis and on the outside in lateral compartmental osteoarthritis.
Our United States patent 5,277,698, issued August 18, 1993 relates to a knee bracing method that reduces the effect of uni-compartmental osteoarthritis. Force is applied to the knee on that side of the knee remote from the compartment having osteoarthritis as the knee moves to extension. The force is applied at a point about 10° to 15° posterior of the normal axis of rotation of the knee.
This method has proved to be an extremely effective method of ameliorating the effects of uni-compartmental osteoarthritis but a problem can occasionally occur if the force strap, which is the strap that applies the force to the knee at a point about 10° to 15° posterior of the normal axis of rotation, moves from its effective position. The knee brace useful in the above method typically includes relatively rigid cuffs, one to be received around the femur and one to be received around the tibia. A hinge, having rigid limbs extending from it, is attached by those limbs to the cuffs. This brace generally is described and claimed in, for example, commonly owned United States Patent 5,302,169, issued April 12, 1994 and 3,902,482 issued September 2, 1975. These disclosures are specifically incorporated herein by reference.
In general with braces of this type the force strap location has been changed, if necessary, by altering the fastening points. However, in a few, difficult osteoarthritis cases the strap can still move from its ideal position as defined above. The present invention is useful in those cases where the strap moves.
SUMMARY OF THE INVENTION Accordingly, and in a first aspect, the present invention is a knee brace having a force strap to extend, when worn by a patient, from a first anchor position on the brace, above the patient's knee, behind the knee, to a second anchor position on the brace, below the patient's knee, and is the improvement comprising a stabilizer for the strap to maintain the force strap in position over the patient's femoral condyle.
In one aspect, the invention is a brace for the treatment of medial collateral ligament injury and comprises a sleeve to be worn around the knee, upper and lower ribs, linked by a hinge member, and a force strap extending from a first anchor point on the upper rib to a second anchor point on the lower rib, a housing on the sleeve to receive the force strap and maintain the strap over the medial femoral condyle.
In a further aspect, the invention is a brace for the treatment of uni-compartmental osteoarthritis and has a tibial cuff and a femoral cuff, linked by a hinge member, and straps to maintain the brace in position and in which the first anchor point is on the femoral cuff and the second anchor point on the tibial cuff, the stabilizer comprising a member extending from one cuff to the force strap. Desirably the member extends from the tibial cuff to the strap in this further aspect of the invention.
DESCRIPTION OF THE DRAWINGS The invention is illustrated, by way of example, in the drawings in which:
Figure 1 is a front view of a brace according to one aspect of the present invention; and
Figure 2 is a front view of a second aspect of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Figure 1 shows a brace useful for the treatment of medial collateral ligament injury. It comprises a sleeve 10 with built-in relatively rigid ribs 12 of approximately semi-circular shape at the top and bottom. The upper rib extends behind the leg, the lower in front of the leg. The ends of the semi-circular ribs are attached by straps 14. There is a hinge 16 and members 18 extend from it. Such hinges are well known in the art, for example, from the US Patents 5,302,169 and 3,902,482 referred to above. There is a strap 20 which may be described as a force strap, which extends around the wearer's leg, from anchor points 21 on the ribs 12. The straps 14, 20 and 22 are engaged in eyelets 24 and are provided with hook and eye fasteners, for example those available under the trademark Velcro.
The sleeve 10 includes an opening 26 that generally fits over the knee cap of the wearer and assists in location of the sleeve 10 on the patient.
Force strap 20 extends from its first anchor point, above the knee, behind the knee to a second anchor point on the lower rib 12, below the patient's knee. There is a stabilizer for the strap to maintain the force strap 20 precisely in position over the patient's femoral condyle over which the strap normally passes when properly adjusted. In Figure 1 that stabilizer comprises a housing 28 on the sleeve 10 that receives the strap 20, preventing it from moving upwardly or downwardly but keeping it firmly positioned over the medial femoral condyle. The housing 28 may be a simple material pocket, firmly attached to the sleeve 10. It is desirably provided with part of a hook and eye attachment on its outer surface to engage the hook or eye fastener of the force strap.
Using the strap of Figure 1 extremely good results have been achieved in alleviating the effects of medial collateral ligament damage.
The embodiment of Figure 2 shows a knee brace that would typically be used for the alleviation of uni- compartmental osteoarthritis. But such a brace can be used in all aspects of knee support.
The brace 122 of Figure 2 has a hinge 124 having rigid limbs 126 and 128 extending from it. Limb 126 is attached to an upper cuff 130 and limb 128 is attached to a lower cuff 132. The upper cuff 130 is located above the knee and the lower cuff 132 below the knee. The hinge 124 joining the cuffs is adjacent the knee and, more particularly, adjacent the compartment that has osteoarthritis.
Cross force strap 134 is pivotally anchored to the upper cuff at bracket 136 and extends around the knee to a pivotal connection to the lower cuff 132. The bracket 136 has an opening through which the force strap 134 can extend. Again the strap 134 is provided with hook and eye fasteners 139. This is desirable in these knee braces because these fasteners permit a wide range of adjustments. Strap 134 is led through the bracket 136, back on itself, to be fastened to itself by the hook and pile fastener. There may be a soft foam plastic cuff attached to the force-strap 134 to make contact with the wearer.
The upper cuff 130 includes a thigh strap 140 extending from anchor points 142 and, again, having a hook or pile fastener at one end to mate with a hook or pile anchor point on the upper cuff 130. In this way, the upper cuff 130 is securely attached to the thigh of a wearer. Beneath the knee the lower cuff 132 is attached by an upper strap 146 extending from a pivotal anchor point 148, around through attachment bracket 150 and back on itself, again using hook and pile fasteners.
There is a second lower strap 152 on the lower cuff 132 to attach the cuff around the calf of the wearer. Again the preferred form of attachment is by hook and pile pieces 154 positioned on strap 152 with the strap able to extend through a bracket 156 back on itself.
According to the present invention, there is a stabilizer, typically in the form of a relatively rigid bar, extending from a pivotal anchor point on the cuff 132 upwardly to an anchor point on the force strap 134.
The brace of Figure 2 is attached to a patient precisely as described, for example, in the above US Patent 5,277,698. However, the feature of the present invention is that after fitting, a stabilizer 158 is located at the pivotal anchor points 160 and 162 and acts to maintain the force strap 134 precisely in the desired position, that is over the femoral condyle. The location of the brace in the correct position is carried out in well known manner. Using the present invention, the location of the strap 134, which in certain difficult cases has been a problem with prior art braces, is no longer a problem as the stabilizer 158 ensures that the position of the strap 134 is, in effect, determined by the unvarying position of the lower cuff 132. The strap 134 cannot rise over the femoral condyle and relax, as has happened in the prior art.
The present invention thus provides a simple, economical but effective method of ensuring that the force strap, which is an important aspect of the two braces, remains in the correct position.
Although the forgoing invention has been described in some detail by way of illustration and example for purposes of clarity of understanding, it will be readily apparent to those of ordinary skill in the art in light of the teachings of this invention that certain changes and modifications may be made thereto without departing from the spirit or scope of the appended claims.

Claims

I CLAIM:
1. In a knee brace having a force strap to extend, when worn by a patient, from a first anchor position on the brace, above the patient's knee, behind the knee, to a second anchor position on the brace, below the patient's knee, the improvement comprising a stabilizer for the strap to maintain the force strap in position over the patient's femoral condyle.
2. A knee brace as claimed in claim 1 in which the brace is for the treatment of medial collateral ligament injury and comprises a sleeve to be worn around the knee, upper and lower ribs, linked by a hinge member, and a force strap extending from a first anchor point on the upper rib to a second anchor point on the lower rib, a housing on the sleeve to receive the force strap and maintain the strap over the medial femoral condyle.
3. A knee brace as claimed in claim 1 in which the brace is for the treatment of compartmental osteoarthritis and has a tibial cuff and a femoral cuff, linked by a hinge member, and straps to maintain the brace in position and in which the first anchor point is on the femoral cuff and the second anchor point on the tibial cuff, the stabilizer comprising a member extending from one cuff to the force strap.
4. A knee brace as claimed in claim 3 in which the member extends from the tibial cuff.
PCT/CA1995/000471 1994-08-10 1995-08-08 Medial collateral ligament brace WO1996004870A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002172361A CA2172361C (en) 1994-08-10 1995-08-08 Medial collateral ligament brace
AU31074/95A AU3107495A (en) 1994-08-10 1995-08-08 Medial collateral ligament brace

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/288,370 1994-08-10
US08/288,370 US5562605A (en) 1994-08-10 1994-08-10 Medial collateral ligament brace

Publications (1)

Publication Number Publication Date
WO1996004870A1 true WO1996004870A1 (en) 1996-02-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA1995/000471 WO1996004870A1 (en) 1994-08-10 1995-08-08 Medial collateral ligament brace

Country Status (4)

Country Link
US (1) US5562605A (en)
AU (1) AU3107495A (en)
CA (1) CA2172361C (en)
WO (1) WO1996004870A1 (en)

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US5562605A (en) 1996-10-08
AU3107495A (en) 1996-03-07
CA2172361C (en) 1999-07-20
CA2172361A1 (en) 1996-02-22

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