Continuous passive motion device for full extension of leg
First Claim
1. A continuous passive motion device for moving an articulable limb through a predetermined uninterrupted reciprocal cycle to achieve full extension of the limb which comprises:
- a base;
a first linkage assembly pivotably mounted on said base, said first linkage assembly comprising a first pair of longitudinal members pivotably joined at a first joint to define an included angle between said first pair of members;
a second linkage assembly comprising a second pair of longitudinal members pivotably joined at a second joint, said second linkage assembly pivotably mounted on said first linkage assembly to establish a support for the limb, said second joint being movable relative to said first joint to distance said second joint from said first joint when said included angle is decreased and to draw said second joint nearer said first joint when said included angle is increased; and
means for increasing and decreasing said included angle;
wherein said first pair of longitudinal members comprise a femoral support member adapted to be attached to the patient'"'"'s upper leg, and a drive bar, and wherein said second pair of longitudinal members comprise a tibial support member adapted to be attached to the patient'"'"'s lower leg, and a cross bar.
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Accused Products
Abstract
A continuous passive motion device for achieving full extension of the leg of a patient includes a base and a four-bar articulated limb support member which is mounted for movement on the base. For the articulated limb support member one bar is a femoral support member which is pivotally mounted on the base. Another one of the bars is a tibial support member which is pivotally joined to the femoral support member. Also included in the device is a drive bar which has a first end reciprocally mounted on the base of the device and a second end which is pivotally attached to the femoral support member. A cross bar having a first end pivotally attached to the tibial support member and having a second end pivotally attached to the drive bar interconnects the tibial support member and the drive bar. The device further includes a motor which is connected to the device for reciprocating the first end of the drive bar to alter the configuration of the device for exercising the leg. A method is disclosed for passively exercising the leg of a patient, using the above described device.
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Citations
18 Claims
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1. A continuous passive motion device for moving an articulable limb through a predetermined uninterrupted reciprocal cycle to achieve full extension of the limb which comprises:
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a base; a first linkage assembly pivotably mounted on said base, said first linkage assembly comprising a first pair of longitudinal members pivotably joined at a first joint to define an included angle between said first pair of members; a second linkage assembly comprising a second pair of longitudinal members pivotably joined at a second joint, said second linkage assembly pivotably mounted on said first linkage assembly to establish a support for the limb, said second joint being movable relative to said first joint to distance said second joint from said first joint when said included angle is decreased and to draw said second joint nearer said first joint when said included angle is increased; and means for increasing and decreasing said included angle; wherein said first pair of longitudinal members comprise a femoral support member adapted to be attached to the patient'"'"'s upper leg, and a drive bar, and wherein said second pair of longitudinal members comprise a tibial support member adapted to be attached to the patient'"'"'s lower leg, and a cross bar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A continuous passive motion device for moving the leg of a patient through a predetermined uninterrupted reciprocal cycle to achieve full extension of the leg which comprises:
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a base; an articulated limb support member having a femoral support member adapted to be attached to the patient'"'"'s upper leg and pivotally mounted on said base, and a tibial support member adapted to be attached to the patient'"'"'s lower leg and pivotally joined to said femoral support member; a drive bar having a first end reciprocally mounted on said base and a second end pivotally attached to said femoral support member; a cross bar having a first end pivotally attached to said tibial support member and having a second end pivotally attached to said drive bar; and means for reciprocating said first end of said drive bar. - View Dependent Claims (10, 11, 12, 13)
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14. A continuous passive motion device for achieving full extension of the leg of a patient which comprises:
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a base; a pair of linkage assemblies, each said assembly having two members pivotally joined together at a joint, said pair of assemblies being joined to establish a quadrangular shaped structure mounted on said base; means on said quadrangular shaped structure for supporting the leg; and means connected with said base for moving said quadrangular shaped structure between a first configuration wherein the leg is in flexure and a second configuration wherein the leg is fully extended; wherein a first of said linkage assemblies comprises a femoral support member adapted to be attached to the patient'"'"'s upper leg and pivotably mounted on said base, and a drive bar having a first end reciprocally mounted on said base and a second end pivotally attached to said femoral support member; and wherein a second of said linkage assemblies comprises a tibial support member adapted to be attached to the patient'"'"'s lower leg and pivotally joined to said femoral support member, and a cross bar having a first end pivotally attached to said tibial support member and having a second end pivotally attached to said drive bar. - View Dependent Claims (15, 16, 17)
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18. A method for passively exercising the leg of a patient to achieve a full extension of the leg which comprises the steps of:
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providing a device which comprises a base, an articulated limb support member having a femoral support member adapted to be attached to the patient'"'"'s upper leg and pivotally mounted on said base, and a tibial support member adapted to be attached to the patient'"'"'s lower leg and pivotally joined to said femoral support member, a drive bar having a first end reciprocally mounted on said base and a second end pivotally attached to said femoral support member, a cross bar having a first end pivotally attached to said tibial support member and having a second end pivotally attached to said drive bar, a rigid plate for holding the femur of the leg for movement with said femoral member; engaging the femur of the leg with said rigid plate; and reciprocating said first end of said drive bar on said base to alter the configuration of said device for exercising the leg.
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Specification