60 results about "Knees surgery" patented technology

There is provided a method and system for determining a distal cut thickness and posterior cut thickness for a femur in a knee replacement operation, the method comprising: performing a tibial cut on a tibia; performing soft tissue balancing based on a desired limb alignment; measuring an extension gap between the femur and said tibial cut while in extension; measuring a flexion gap between the femur and the tibial cut while in flexion; calculating a distal cut thickness and a posterior cut thickness for the femur using the extension gap and the flexion gap and taking into account a distal thickness and posterior thickness of a femoral implant; and performing said femoral cut according to the distal cut thickness and posterior cut thickness.

Tools for resecting the femur include an anchoring device, a three-way alignment guide and a six way alignment guide attachable to the anchoring device, a resection guide attachable to the three-way alignment guide and equipped with couplings for trackers, an A-P sizer, a femoral sizing block bushing attachable to the six-way alignment guide, a 4-in-1 femoral cutting block, a 5-in-1 positional alignment guide attachable to the six-way alignment guide, a pair of diodes, and a 5-in-one cutting block. Methods of utilizing the apparatus are also disclosed.

The present invention provides for an apparatus for cutting a tibia, a stylus, an apparatus for cutting a femur, an apparatus for aligning a femoral cutting guide, and an ankle clamp in support of a unicondylar knee surgery. The present invention further provides for a method of preparing a femoral condyle of a femur for the implantation of a unicondylar femoral knee implant. The apparatus for cutting a tibia includes a unicondylar tibial resection guide that is adjustably connectable to a unicondylar tibial alignment guide and configured to operate concurrently with the tibial alignment guide. The apparatus for cutting a femur includes a spacer block and a cutting guide configured to operate concurrently with the spacer block.

Instrumentation for use in knee surgery comprises an intramedullary rod (10) for insertion into an end of a femur (100) and a distraction device (62) coupleable to the intramedullary rod (10) and operable between the intramedullary rod (10) and the tibia for adjusting the tension of the collateral ligaments on either side of the knee. A cutting guide (70) is configured to locate over an intramedullary rod (10) that has been inserted into an end of a femur (100), such that the position of the cutting guide (70) relative to the intramedullary rod (10), and therefore the femur (100), is adjustable in at least the anterior-posterior direction. A kit for use in knee surgery is provided and a method of adjusting the tension of the collateral ligaments on either side of a knee is taught.

The invention concerns monolithic foam sleeves that comprises titanium or titanium alloy foam having a porosity of 50 to 85% and possess a proximal end, a distal end, an interior wall that defines an interior channel and extends from the proximal end to the distal end; and a terraced outer surface that tapers such that said sleeve is widest at the distal end and most narrow at the proximal end.

A patient's leg is clamped into place for knee surgery by placement of the lower leg and foot in a leg receiving structure which is removably attached to a platform through the use of VELCRO closures. The platform is adjustably connected to a rail of an operating table. The leg receiving structure includes a foot holder, into which the foot is strapped, and a leg holder, into which a lower part of the leg is strapped. The leg holder is pivotally mounted on the foot holder, so that the foot may be flexed as the foot holder is moved among various positions on the platform.

A femoral tibial spreader (100) for spreading adjacent bones includes a radial measurement gauge (111) for providing incidia corresponding to an amount of force being applied to the forward ends (105,106) of the femoral tibial spreader (100). The femoral tibial spreader (100) may be used, for example, to separate the femur (301) and tibia (302) during knee surgery. The radial measurement gauge (111) may be used to determine an amount of force being applied to the femur (301) and tibia (302), for example, by the medial and arterial ligaments. Two handle members (104,109) are squeezed together, which causes the forward ends (105,106) to open. A biasing member (110) allows a measurement extension (108) to pivot towards a handle member under tension, thereby providing a measurement of force applied by the ligaments.

An apparatus and method for preparing a tibia for knee surgery. The apparatus includes a tibial base having a center axis, and a handle coupled to the base at an anterior base location that is offset relative to the center axis.

A system for resecting a tibia and femur during arthroplasty includes anchoring devices, a three-way alignnment guide attachable to an anchoring device. The alignment guide provides for locating a resection guide in three degrees of freedom, including one translation and two rotations. The resection guide is coupled to a computer navigation system.

A femoral distractor includes a top post for positioning under a patient's knee and a bottom pin for fixed attachment to a hospital bed rail. A vertical rod extends between the top post and horizontal bottom pin to move the knee joint in the vertical direction upon operation of a trigger assembly.

A device for rehabilitating a knee after knee surgery includes a support adapted to support the leg at the popliteal fossa while allowing the knee to be bent about the support with little interference from the support. A method of knee rehabilitation includes the step of supporting the patient's leg on the support and allowing the patient to control to movement in order to overcome muscle guarding. The support is carried by uprights that are spaced apart far enough to allow the patient to be positioned on his back between the uprights with the knee to be rehabilitated disposed over the support and the other leg stretched straight under the support.

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 present invention includes a rehabilitation apparatus that can assist a patient that has been impaired, injured/traumatized, or subject to degenerative conditions in his or her lower limbs. The apparatus may be designed to exercise the extension and flexion movements for a patient's leg after knee surgery. A thigh support link may be connected to an upper leg link, which is connected to a lower leg link for supporting the patient's leg during the extension and flexion range of movements. A foot plate with wheels may be connected to the lower leg link, and the wheels enable the foot plate to slide along a base as the patient moves in both directions. A sled or connector provides a flexible connection between the thigh support link and the base, which allows the thigh support link to travel along the base in conjunction with the foot plate wheels. The present invention provides adjustable, constant resistance as the extension and flexion exercises are done. In some embodiments, the resistance may be different for the extension and flexion ranges of motion. The resistance may be applied through the connection of the sled or connector to the base. This can be done with direct or magnetic resistance mechanisms. In one embodiment, one or more b-motors or magnetic clutches are used to provide magnetic resistance.

The invention provides a degradable gasket with anti-bacterial anti-adhesion performance. The degradable gasket is prepared via weaving or knitting of a plurality of bundles of magnesium-based metal wire, or via punching of magnesium-based metal sheets. The magnesium-based metal wire can be made of pure magnesium or a magnesium-based alloy of different elements based on disease characteristics and treatment requirements. The degradable gasket possesses excellent biocompatibility; in vivo degradation and absorption can be realized; degradation speed can be controlled; the degradable gasket is capable of preventing postoperative adhesion and infection, and promoting wound healing, can be used for preventing epidural adhesion after orthopedic surgery laminectomy, adhesion after tendon rupture repairing operation, adhesion after knee surgery, dura adhesion after transcranial surgery, eye socket soft tissue adhesion, intestinal adhesion after abdominal surgery, and intrauterine adhesion, is capable of reducing infection risk of the above surgeries, and possesses significant clinical application value.

A device for positioning a tibial tunnel during ACL reconstruction, the device that includes an elongated body having proximal and distal ends; and a distal arm extending from the distal end of the elongated body, a distal portion of the distal arm being configured for insertion into a pre-formed opening in a femur. The distal arm and the body are not aligned relative to each other when viewed from above. A pair of such devices, providing tunnel positioning for right and left knee surgeries, maybe provided in a set.

The invention relates to a customized compound bone cutter for femoral condyle which is used for cutting the bone of the femoral condyle in knee surgery. The customized compound bone cutter for femoral condyle comprises a paracondyloid positioning surface, a remote-end positioning surface, a paracondyloid fixing hole, a paracondyloid fixing inclined hole, a remote-end fixing inclined hole, a force line inspection line, a femoral condyle prosthesis positioning hole, a femoral condyle remote-end bone cutting groove, a paracondyloid bone cutting groove, a front inclined-surface bone cutting groove, a hypocondyle bone cutting groove, a rear inclined-surface bone cutting groove and an intercondylar bone cutting groove; the femoral condyle model number is determined by virtue of preoperative planning based on the CT data of a patient, and then the contact surface, the fixed point and each cutting surface can be determined; the customized compound bone cutter for femoral condyle has the advantages that various parameters are more accurate, the used operating tools are greatly reduced, the operating time is greatly shortened, the infection risk is reduced, pulp exposing is avoided, wound is reduced, and the dependency on the experience of a doctor is reduced; as a result, the customized compound bone cutter for femoral condyle is especially suitable for operations not suitable for conventional operating tools.

The invention belongs to the technical field of medical beds, in particular to a multifunctional operating bed for bone and joint surgery. The operating bed has a single function and needs the patient to move to the nursing bed after the operation. The problem of secondary damage is likely to be caused. The following plan is proposed, including the main bed board, the right side of the main bed board is welded with a headboard, the left side of the main bed board is welded with a footboard, and the main bed board includes an auxiliary bed board and a turning board A first hinge is fixed on one side outer wall of the auxiliary bed board by bolts, and the auxiliary bed board is connected with the turning board through the first hinge. The invention can massage the patient before the operation, so that the patient can relax, avoid the effect of the patient's tension from affecting the operation effect, help the patient to turn over and adjust the angle of lying down during the operation, and avoid the injury caused by the manual turn over during the operation. Moreover, it saves time and effort, can help patients stretch and correct bones, enriches the functionality of the device, and is easy to operate, high in safety, and has multiple functions.