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In one aspect, the gap gauge may include a balance gauge, connected to the balance indicator. The balance gauge may be configured to measure the balance status. The gap gauge may include a dial having marks positioned on a face of the dial to indicate a measure of the balance status of the second plate relative to the first plate, and a needle connected to the balance indicator such that rotation of the second plate about a longitudinal axis of the second plate moves the needle to point toward a mark on the face of the dial that reflects the balance status.
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Added by DJM 2 2021
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It is to be understood that the drawings are for purposes of illustrating the concepts of the disclosure and may not be drawn to scale. Furthermore, the drawings illustrate exemplary embodiments and do not represent limitations to the scope of the present disclosure.
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In addition, or alternatively, the gap gauge 100 can be used to determine a balance status of a joint 108 that is part of the arthroplasty procedure. The joint 108 can be a toe joint, ankle joint, knee joint, hip joint, arm joint, elbow joint, finger joint, or the like. In the illustrated embodiment, the joint 108 is a knee joint and the first bone is a femur 102 and the second bone is a tibia 104. Gap gauge 100 can be used to determine both displacement within the opening 106 and a balance status using a single device. Alternatively, a user, such as a surgeon, can use the gap gauge 100 to determine displacement or a balance status using a single convenient device with the first bone and second bone in flexion, in extension, or at an angle between flexion and extension.
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As part of an arthroplasty procedure, the gap gauge 100 can be inserted into an opening 106, also referred to as a gap, between the first bone and the second bone. The gap gauge 100 can be used to determine how much displacement exists between the first bone and the second bone within the opening 106. As used herein, an “opening” refers to a gap, a hole, an aperture, a void in a structure, or the like. In certain embodiments, an opening can refer to a structure configured specifically for receiving something and/or for allowing access. The amount of displacement can be referred to herein as measuring a gap, or space, between the first bone and second bone.
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Figure 1A is a perspective view depicting one exemplary embodiment of a gap gauge 100 for facilitating an arthroplasty procedure on a first bone and a second bone of a patient. As used herein, an “arthroplasty procedure” refers to a surgical procedure for restoring and/or improving function and/or operation of a joint of a patient. An arthroplasty procedure can be done for a toe joint, ankle joint, knee joint, hip joint, arm joint, elbow joint, finger joint, or the like. In the illustrated embodiment, the first bone can be a femur 102 and the second bone can be a tibia 104. As used herein, a "gap gauge" refers to an apparatus, instrument, structure, device, component, system, assembly, hardware, software, firmware, circuit, module, or logic structured, organized, configured, programmed, designed, arranged, or engineered to measure an attribute, characteristic, state, or condition of another structure or object or set of structures or objects. In one embodiment, the gap gauge is structured, organized, configured, programmed, designed, arranged, or engineered to measure a displacement between two structures.
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The present disclosure discloses a gap gauge for facilitating an arthroplasty procedure on a first bone and a second bone of a patient. During an arthroplasty procedure, a surgeon may need to confirm that the gap between two bones of the joint is of a desired displacement and that the joint has a desired balance (e.g. balanced, varus condition, or valgus condition). Using separate instruments to get either the displacement or the balance status can complicate the procedure and may require more personnel to assist in the procedure. As one instrument is exchanged for another (e.g., an instrument that only measures displacement exchanged for an instrument that only measures balance status), parts of a joint can shift and thus alter a displacement already measured or alter a balance status read using an instrument that cannot provide both displacement measurements and a balance status, or balance measurement in a single instrument. Consequently, a need exists for an improved gap gauge. In particular, a need exists for gap gauge that can provide both a displacement measurement and a balance status (e.g., balance measurement) using a single instrument. Furthermore, the present disclosure provides for a gap gauge that enables a user to optionally disengage/disable a balance indicator or balance gauge 168 during use for that a user can use the same instrument to only measure displacement between two joint bones, if desired.
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The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
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The phrases "connected to," "coupled to" and "in communication with" refer to any form of interaction between two or more entities, including mechanical, electrical, magnetic, electromagnetic, fluid, and thermal interaction. Two components may be functionally coupled to each other even though they are not in direct contact with each other. The term "abutting" refers to items that are in direct physical contact with each other, although the items may not necessarily be attached together. The phrase "fluid communication" refers to two features that are connected such that a fluid within one feature is able to pass into the other feature.
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An anterior-posterior axis is an axis perpendicular to the coronal plane. A medial-lateral axis is an axis perpendicular to the median plane. A cephalad-caudal axis is an axis perpendicular to the transverse plane. These descriptive terms may be applied to an animate or inanimate body.
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Standard medical directions, planes of reference, and descriptive terminology are employed in this specification. For example, anterior means toward the front of the body. Posterior means toward the back of the body. Superior means toward the head. Inferior means toward the feet. Medial means toward the midline of the body. Lateral means away from the midline of the body. Axial means toward a central axis of the body. Abaxial means away from a central axis of the body. Ipsilateral means on the same side of the body. Contralateral means on the opposite side of the body. A sagittal plane divides a body into right and left portions. A midsagittal plane divides the body into bilaterally symmetric right and left halves. A coronal plane divides a body into anterior and posterior portions. A transverse plane divides a body into superior and inferior portions.
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In one aspect, the gap gauge may include a first plate shaped to engage a medial condyle and a lateral condyle of the first bone and a second plate shaped to engage a medial condyle and a lateral condyle of the second bone.
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Figure 12 illustrates a flowchart for measuring a gap and/or balance status between a femur and a tibia of a patient, according to one embodiment of the present disclosure.
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Figures 11A and 11B are perspective views of a lock-out mechanism of a gap gauge, according to one embodiment of the present disclosure; and
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Figures 10B and 10C are side views of the pin of Figure 10A, according to one embodiment of the present disclosure;
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Figure 10A is a perspective view of a pin of the gap gauge of Figure 1A, according to one embodiment of the present disclosure;
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Figure 9 illustrates an exploded view of a gap gauge, according to one embodiment of the present disclosure;
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Figure 8B is a rear view of a driver and cam of a gap gauge, according to one embodiment of the present disclosure;
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Figure 8A is a front view of a driver of a gap gauge, according to one embodiment of the present disclosure;
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re-inserting the first plate and the second plate of the gap gauge between the femur and the tibia;
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A gap gauge is disclosed for facilitating an arthroplasty procedure on a first bone and a second bone of a patient. The gap gauge may include a first plate positionable in contact with the first bone, a second plate positionable in contact with the second bone. The second plate may be displaced from the first plate by a displacement. The gap gauge may further include a separator connected to the first plate and the second plate, a separation indicator coupled to the separator and configured to indicate the displacement, and a balance indicator connected to at least one of the first plate and the second plate. The balance indicator may indicate a balance status between the first plate and the second plate. The separator can be actuated to adjust the displacement.
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