METHOD AND APPARATUS FOR PERFORMING ANTERIOR HIP SURGERY
First Claim
1. An apparatus for establishing a supine pelvic reference plane for a specific patient, the apparatus comprising:
- an elongated support arm;
a first leg attached to said elongated support arm;
a second leg slidably attached to said elongated support arm; and
a third leg slidably attached to said elongated support arm, wherein;
the first, second, and third legs have tips, andthe second and third legs are slidably adjusted relative to the elongated support arm such that;
the tip of the first leg contacts a left anterior superior iliac spine of the specific patient,the tip of the second leg contacts a right anterior superior iliac spine of the specific patient, andthe tip of the third leg contacts an anterior aspect of the ischium of the specific patient'"'"'s pelvis below the acetabulum, and further whereinthe apparatus defines the supine pelvic reference plane for the specific patient, andthe supine pelvic plane has a known relationship to a standard reference plane for the specific patient.
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Accused Products
Abstract
An apparatus registers a patient'"'"'s pelvis during surgery by establishing a patient-specific, supine pelvic reference plane. The apparatus may include an elongated support arm having three legs, at least two of which may be moveable along the arm. The first leg may contact the patient'"'"'s right anterior superior iliac spines (ASIS), the second leg may contact the left ASIS, and the third leg may contact an anterior aspect of the ischium of the patient'"'"'s pelvis below the acetabulum of the hip being operated on. The distances between the first leg and the second and third legs may be determined preoperatively so that the legs dock to the desired points. The apparatus may further include a direction indicator configured to point in a desired orientation for inserting an acetabular cup component in the patient'"'"'s acetabulum.
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Citations
20 Claims
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1. An apparatus for establishing a supine pelvic reference plane for a specific patient, the apparatus comprising:
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an elongated support arm; a first leg attached to said elongated support arm; a second leg slidably attached to said elongated support arm; and a third leg slidably attached to said elongated support arm, wherein; the first, second, and third legs have tips, and the second and third legs are slidably adjusted relative to the elongated support arm such that; the tip of the first leg contacts a left anterior superior iliac spine of the specific patient, the tip of the second leg contacts a right anterior superior iliac spine of the specific patient, and the tip of the third leg contacts an anterior aspect of the ischium of the specific patient'"'"'s pelvis below the acetabulum, and further wherein the apparatus defines the supine pelvic reference plane for the specific patient, and the supine pelvic plane has a known relationship to a standard reference plane for the specific patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method comprising:
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defining a standard pelvic plane for a patient; defining a supine pelvic reference plane for the patient; establishing a mathematical relationship between the standard pelvic plane and the supine pelvic reference plane; determining an orientation for a prosthetic component relative to the standard pelvic plane; translating the orientation to the supine pelvic reference plane; docking a registration device to predetermined points on the patient'"'"'s pelvis; and providing a directional indicator on the registration device, where the directional indicator is configured to define the orientation for the prosthetic component. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A surgical registration device comprising:
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a support bar having first and second ends, a longitudinal axis, and a nominal plane; a first leg removably attached to the first end of the support bar; a second leg removably and adjustably attached to the second end of the support bar, where the second leg is adjustable in a direction along the longitudinal axis; a third leg removably and adjustably attached to the support bar, where the third leg is adjustable in a first direction along the longitudinal axis and in a second direction orthogonal to the longitudinal axis; and a direction indicator mounted to the support bar, the direction indicator defining a predetermined orientation relative to the nominal plane defined by the support bar.
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Specification