140 results about "Hip joint replacement operation" patented technology

Methods and apparatus using a surgical navigation system to position the femoral component of a prosthetic hip during hip joint replacement surgery without separately affixing a marker to the femur. The navigation system acquires the center of rotation of the hip joint as well as at least one point on the femur in the pelvic frame of reference. From these two points, the navigation system calculates the position and length of a first line between the center of rotation of the hip joint and the point on the femur. Optionally, a second point on the femur that is not on the first line is palpated. The system can calculate the position and length of a second line that is perpendicular to the first line and that runs from the first line to the second palpated point on the femur. The prosthetic cup is implanted and its center of rotation is recorded. A tool for forming the bore within which the stem of the femoral implant component will be placed is tracked by the navigation system. While the tool is fixed to the femur, the surgeon re-palpates the same point(s) on the femur that were previously palpated. The navigation system calculates the position and length of a first line between the center of rotation of the prosthetic cup and the re-palpated first point. If a second point on the femur was re-palpated, the navigation system also calculates the position and length of a perpendicular line between the first line and the second point. The surgical navigation system uses this information to calculate and display to the surgeon relevant information about the surgery, such as change in the patient's leg length and / or medialization / lateralization of the joint.

Instrumentation and method for determining the orientation of the pelvic bone during hip-replacement surgery. Instrumentation includes a pelvis frame and a pelvis level. The pelvis frame is used for performing an operation which provides preliminary information for determining the position of the pelvic bone, and includes pads which are specifically contoured for contact with the pelvic bone. The pelvis level is used in combination with the pelvis frame to determine the exact position of the patient's pelvic bone, and includes a ball level which is capable of withstanding steam sterilization.

The invention includes: a locating system; a computer, interfaced to the locating system and interpreting the positions of tracked objects in a generic computer model of a patient's hip geometry; a software module, executable on the computer, which defines the patient's pelvic plane without reference to previously obtained radiological data, by locating at least three pelvic landmarks; and a pelvic tracking marker, fixable to the pelvic bone and trackable by the locating system, to track in real time the orientation of the defined pelvic plane. Preferably, the system also includes a femoral tracking marker, securely attachable to a femur of the patient by a non-penetrating ligature and trackable by the locating system to detect changes in leg length and femoral offset.

A CAS system and method for measuring surgical parameters during hip replacement surgery to guide an operator in inserting a hip joint implant in a femur, comprising a first trackable reference in fixed relation with the pelvis and a registration tool. A sensor apparatus tracks the first trackable reference and the registration tool. A controller unit is connected to the sensor apparatus so as to receive tracking data for the first trackable reference and the registration tool. The controller unit has a position and orientation calculator to calculate from the tracking data a position and orientation of the pelvic trackable reference to track the pelvic frame of reference, and of the registration tool to produce a femoral frame of reference at two sequential operative steps. A reference orientation adjustor receives tracking data for the pelvic frame of reference, and the femoral frame of reference associated with the first trackable reference, to orient the femoral frame of reference in a reference orientation with respect to the pelvic frame of reference, and to produce a reference adjustment value as a function of the reference orientation. A surgical parameter calculator receives tracking data from the registration tool to calculate surgical parameters as a function of the reference adjustment value, the surgical parameters at the two sequential operative steps being related by the reference orientation.

A CAS system for measuring surgical parameters during hip replacement surgery comprises a first tracking reference in fixed relation with the pelvis to form a frame of reference. A registration tool is trackable. A sensor apparatus tracks the first tracking reference and the registration tool. A controller unit receives tracking data for the first trackable reference and the registration tool. The controller unit has a position and orientation calculator for calculating from the tracking data a position and orientation of the pelvic tracking reference to track the frame of reference, and of the registration tool to produce femoral models at a first and a second sequential operative steps. An alignment adjustor aligns the femoral models with the frame of reference. A surgical parameter calculator calculates surgical parameters as a function of the femoral models as aligned by the alignment adjustor.

Methods and apparatus using a surgical navigation system during hip joint replacement surgery without separately affixing a marker to the femur. The navigation system acquires the center of rotation of the hip joint as well as at least one point on the femur in the pelvic frame of reference. From these two points, the navigation system calculates the position and length of a first line between the center of rotation of the hip joint and the point on the femur. A prosthetic cup is implanted and its center of rotation is recorded. A tool for forming the bore within which the stem of the femoral implant component will be placed is tracked by the navigation system. The navigation system calculates the position and length of a first line between the center of rotation of the prosthetic cup and the re-palpated first point. The surgical navigation system uses this information to calculate and display to the surgeon relevant information about the surgery.

The teachings provided herein are generally directed to a posterior retractor comprising a handle section; and, a retraction section having an anchoring element. In most embodiments, the handle section comprises a proximal region, a mid-region, and a distal region. And, the length of the handle section can be sufficient to position a hand-held portion of the proximal region of the handle section outside of a surgical site during use of the posterior retractor in a hip arthroplasty procedure. The teachings include the use of the posterior retractor in a hip arthroplasty procedure.

Methods and devices for performing hip replacement surgery are described. According to one embodiment, a method comprising providing an incision locator, the incision locator comprising at least one location indicator and at least one incision indicator, the location indicator configured to align with a central axis of the femur, and the incision indicator configured to guide a proper placement of a surgical incision when the location indicator is aligned, aligning the location indicator with at least one anatomical feature of the patient, making an incision in the proper location as guided by the incision indicator, and completing the surgical procedure is described.

A CAS system and method comprises a first reference in fixed relation with the pelvis and a registration tool. A sensor apparatus tracks the first reference and tool. A controller unit receives tracking data for the first reference and tool. A calculator tracks the pelvic frame of reference, and the tool to produce a femoral frame of reference at two sequential operative steps. A reference orientation adjustor receives tracking data for the pelvic frame of reference to orient the femoral frame of reference in a reference orientation with respect to the pelvic frame of reference, and to produce a reference adjustment value as a function of the reference orientation. A surgical parameter calculator receives tracking data from the tool to calculate surgical parameters as a function of the reference adjustment value.

A method for accurately positioning the acetabular cup in a minimally invasive total hip arthroplasty (THA), comprising the steps of (a) placing the cup in roughly the correct position in the acetabulum using a acetabular component placement tool, (b) taking a first abduction reading and a first anteversion reading using a gyroscopic positioning unit aligned with the acetabular component placement tool, (c) taking an image of at least a portion of the cup using a radiography unit, (d) using the image to determine the actual orientation of the cup and required position of the cup to properly orient the acetabular component, (e) incrementally altering the position of the cup by using a striking tool, (f) taking new abduction and anteversion readings using the gyroscopic unit to determine the relative movement of the cup caused by the tapping, and (g) repeating any of the steps as necessary.

Adapter plane (1′) for surgical table, comprising a main portion (2′) and a secondary portion (3′) which define—at the top part—a surface (4′) for supporting the patient, said secondary portion (3′) being arranged for supporting at least one pelvis portion of the patient, said adapter plane (1′) being rigidly couplable above said surgical table with the main portion (2′) overlapping the surgical table and the secondary portion (3′) projecting with respect to the surgical table, at least the secondary portion (3′) of said adapter plane (1′) being made of radiotransparent material.

Femoral head modular resurfacing systems are described. The systems primarily include a head component and a stem component. The configuration of the head component and stem components allow for minimum invasiveness into the femur head region, thus conserving greater amounts of bone tissue than would be possible with conventional hip replacement systems. The systems also provide for various angles and offsets to be achieved between the systems and the femur head. The systems are useful in partial hip replacement procedures, as well as total hip replacement procedures, in which case an optional acetabular component would also be employed.

Methods and devices for performing hip replacement surgery are described. According to one embodiment, a method comprising providing an incision locator comprising a first wing and a second wing, the first wing adapted to be oriented generally along the femoral axis of a femur forming the hip on which the surgery is being conducted, positioning a proximal portion of the first wing adjacent to the greater trochanter, positioning other portions of first wing generally parallel to the femoral axis, indicating a proper placement of an incision based at least in part on the position of the second wing of the incision locator, performing an incision using at least one incision guide in at least one of the first and second wings, and completing the surgical procedure is described.

A device, and a method for using it, for implanting a cup liner within a cup attached to the acetabulum of the hip bone, during hip replacement surgery. In a preferred embodiment, the device includes a main body with proximal and distal ends. The distal end may terminate in a liner seat and an engaging mechanism. Initially, the engaging mechanism may be coupled to the cup liner; a slight retraction of the engaging mechanism relative to the main body and liner seat may be sufficient to properly seat the cup liner on the liner seat. The device is now used to place the cup liner within the cup. The engaging mechanism may again be retracted to disengage the cup liner from the engaging mechanism, without dislodging the cup liner from the cup.

A device for accurately positioning the acetabular cup in a minimally invasive total hip arthroplasty (THA), comprising the steps of (a) placing the cup in roughly the correct position in the acetabulum using a acetabular component placement tool, (b) taking a first abduction reading and a first anteversion reading using a gyroscopic positioning unit aligned with the acetabular component placement tool, (c) taking an image of at least a portion of the cup using a radiography unit, (d) using the image to determine the actual orientation of the cup and required position of the cup to properly orient the acetabular component, (e) incrementally altering the position of the cup by using a striking tool, (f) taking new abduction and anteversion readings using the gyroscopic unit to determine the relative movement of the cup caused by the tapping, and (g) repeating any of the steps as necessary.

Systems and methods are described herein to calculate implant orientation measurements of an acetabular cup implant in hip replacement surgery, such surgery performed with minimally invasive incisions. Surgeons may obtain real-time updated implant orientation measurements that compensate for pelvic tilt of a patient, such tilt measured pre-operatively. Implant orientation measurements may be measured from the patient's anterior pelvic plane, supine coronal plane, standing coronal plane or any other reference plane that the surgeon may find useful. Also disclosed are systems, methods and devices to measure hip center of rotation and provide leg length and offset measurements in hip replacement surgery.

Apparatus (20′) for positioning the lower limb of a patient (500) during operation, in particular for hip replacement operations with anterior approach, comprising: a traction arm (30′) with at least a distal portion (34′, 36′) defining a traction axis (x′); a support framework (40′) coupled to said traction arm (30′) so as to allow the adjustment of the position of one of its distal ends (32′); a coupling (60′) constrained to said traction arm (30′) and arranged to be associated to the distal end of the lower limb of the patient (500); at least a first actuator (34′) which defines with its action a relative movement of the coupling (60′) with respect to the traction arm (30′), at least a component of said relative movement being parallel to the traction axis (x′).

Provided is a bone plate for the olecranon of the proximal ulna using a combination of screws and K wires. The plate is curved to fit the shape of the olecranon and is screwed in place. The plate has a locking section located in the curved section. A fastener is pushed over the ends of the K wires and locks in to the locking section of the plate. The fastener has a tapered wedge that secures the K wires allowing fixation to the plate and resists their withdrawal. A femoral stem cap is used during hip replacement surgery and protects the Morse taper of the femoral stem once the ball of the hip joint is removed. The femoral stem cap has an air vent to allow air to pass when being applied and removed.

Devices and methods for use in hip replacement surgery can incorporate computer models of a patient's acetabulum and surrounding bone structure, a first patient-specific jig designed from the computer model and configured to correspond to a final installation position and orientation of a prosthetic hip implant, a second patient-specific jig, also designed from the computer model, configured to refine the procedure, if necessary, following use of the first patient-specific jig, and / or a third patient specific jig, designed from the computer model, configured to refine the procedure, if necessary, following use of the first and second patient-specific jigs, allowing the surgeon to properly position and orient the hip prosthesis. Also shown and described are novel devices for implanting an acetabular cup.

The present invention includes a measurement / assessment technique based upon a collection of angular and distance measurements taken with respect to x-ray visible osteo-anatomical artifacts to arrive at accurate and easily reproducible component placement. In the context of hip arthroplasty surgery the method of the present invention involves determinations, from two different two-dimensional views, of the angles and distances from osteo-anatomical artifacts, to allow a surgeon to approach a hip resurfacing operation with the distance and angular measurements to be translated into actual markings and device settings to be able to accurately ream the femoral head structure, position and affix the femoral cap and acetabular cup components in accordance with the pre-determined distance and angular measurements.

A ready-for-use surgical kit and a facilitated protocol for the implantation of acetabular prosthesis in hip replacement surgery have been introduced. In particularly, a ready-for-use package includes both a set of the artificial acetabular prosthesis and a set of specific reamer(s) with a predefined spherical cutting profile. According to a protocol, surgeon could accurately select a package including both a size of acetabular prosthesis and a corresponding finishing reamer according to a pre-measurement and bone condition of a respective patient, and then patient-specifically remedy a defected acetabulum into a full hemispherical form having a personalized dimension by the reamer(s) within the package during operation.

Tools may be used individually and / or in combination to allow minimally invasive and safer orthopedic surgery. A femur adjustment tool lifts and lateralizes the proximal end of the femur during hip replacement surgery by pivoting on a ball temporarily placed in the acetabulum. A tissue protection and broach (rasp, cutting, drilling) guide tool may retract tissue at the incision, protect tendons and soft tissue, and provides a curved, elongated surface that cradles and guides the broaching tool. A tip of the main body of the protection and guide tool, and a hook protruding from the main body, may extend along opposite surfaces of the femur to help “capture” a portion of the femur for tool stability and to effectively and positively protect the piriformus tendon that will reside in the “V” between the hook and tip. A bone clamp is used when a generally transverse cut is made across a bone, for example, a knee surgery proximal tibial cut, wherein the clamp improves control of the bone portion for safer freeing of the bone portion from soft tissue and extracting the bone portion from the incision. A broad, flat plate of the bone clamp may be slid between the bone and the bone portion into the narrow space that has been created by cutting the bone, and a relatively narrow gripping member may be slid along / across the opposing surface of the bone portion, which allows the narrow gripping member to fit into the intercondylar notch of the femur.

The invention relates to a device (10) for fixing a femur in hip endoprosthetics, comprising a femur support (18), which has a bent hook part (36) that forms a supporting rest for the femur to be fixed, in the region between the greater trochanter and the lesser trochanter, and which has a shaft (38) connected to the hook part (36), a lever arm (20), which has a column (22) and a cantilever (24) having a receiving portion (26) for attaching the shaft (38), an adjusting device (28) attached to an operating table (12), and a retainer (30), which can be coupled to the adjusting device (28) and to which the column (22) of the lever arm (20) can be attached. The adjusting device (28) has a drive (32) for moving the column (22) in an adjustment plane, which is perpendicular to the lying surface (16) of the operating table (12) and parallel to the longitudinal direction of the operating table. The adjusting device (28) also has an axis of rotation (34) perpendicular to the adjustment plane, about which axis of rotation the retainer (30) can be rotated in the adjustment plane by means of the drive (32) in order to pivot the column (22).

The invention discloses a locating device and method for an acetabulum rotating center, relates to a locating device, and particularly relates to a locating device and method for rapidly locating an acetabulum rotating center. The locating device is characterized by comprising a handle and three support legs, wherein a universal joint is arranged at the bottom end of the handle, the support legs are connected with the handle through the universal joint, and the support legs rotate around the universal joint and are of telescopic structures. The locating device for the acetabulum rotating center is scientific in design, simple in structure and convenient to use; and the normally developed acetabulum center at one side is figured out by a computer, and then the lengths of the three support legs of the locating device for the acetabulum rotating center are regulated through a scale, the three support legs are respectively placed on three mark points so that the position of the acetabulum rotating center can be rapidly and accurately located, the accuracy of prosthesis placing is improved, and the success rate of a complex total hip replacement operation is increased.

The field of the invention relates to systems and methods for surgical retractor, and more particularly to systems and methods for self-retaining retractor used in hip replacement surgery. In an embodiment, a retractor for surgery comprises a pair of handles, a locking ratchet, a first arm comprising a first portion, a hinge joint, and a second portion having a modular blade system; and a second arm comprising a first portion, a universal locking joint, a locking lever, and a second portion having a generally triangular shaped end. In an embodiment, the modular blade system has an interchangeable blade. In another embodiment, the second portion of the second arm has a ball shaped end. In another embodiment, the second portion of the second arm has a female end. In another embodiment, a female broach system comprises a female broach having a generally triangular aperture at one end, an extraction pattern on one side, and compaction pattern on the remaining sides; a male acetabular self-retaining broach insert; and a male trunion trial.

Devices and methods for use in hip replacement surgery can incorporate computer models of a patient's acetabulum and surrounding bone structure, a first patient-specific jig designed from the computer model and configured to correspond to a final installation position and orientation of a prosthetic him implant, a second patient-specific jig, also designed from the computer model, configured to refine the procedure, if necessary, following use of the first patient-specific jig, and / or a third patient specific jig, designed from the computer model, configured to refine the procedure, if necessary, following use of the first and second patient-specific jigs, allowing the surgeon to properly position and orient the hip prosthesis. Also shown and described are novel devices for implanting an acetabular cup.

An acetabular cup having one or more osteoinductive formulations, wherein each osteoinductive formulation comprises one or more osteoinductive agent(s). In one embodiment of the invention, the acetabular cup comprises a porous coating into which the osteoinductive formulation is impregnated. In another embodiment of the invention, the acetabular cup comprises microchambers into which the osteoinductive formulation is sealed with a biodegradable or current responsive polymer. The osteoinductive formulations may be available in immediate or sustained release formulations. The invention further relates to preventing and treating osteolytic lesions formed following implantation of an acetabular cup during hip replacement surgery.