16 results about "Expandable cage" patented technology

A cage can be positioned around a medical balloon, such as an angioplasty balloon, to assist in a medical procedure. The cage can include a plurality of strips, each extending between a set of rings including first and second rings. As the balloon expands, the first and second rings move closer together and allow the strips to expand outward. The cage may have wedge dissectors on the strips.

[Solution] An expandable intervertebral spacer system has upper and lower plates forming a cage. The top, bottom, and sides of the cage have openings for receiving bone graft material. At least one angled section extends from the upper or lower plate into the cage. The upper and lower plates are connected to each other by a hinge at the proximal end of the cage. The cage is expanded by inserting a push rod from the proximal end of the cage against the angled section, forcing the upper and lower plates apart at a desired angle. A locking mechanism at the distal end of the cage uses a ratcheting mechanism to secure the plates apart. In this ratcheting mechanism, a torsion spring biases a movable strut against a fixed strut, which cooperates with sawtooth engagement on the movable and fixed struts to secure the upper and lower plates apart.

A two-stage intervertebral implant comprises an expandable cage comprising a pivot connecting upper and lower bodies, a first expansion mechanism, such as a wedge, configured to pivot the upper body and the lower body at the pivot point in a first stage, and a second expansion mechanism, such as a toggle joint, configured to pivot the upper body and the lower body at the pivot point in a second stage beyond the first stage. A method of implanting an implant comprises inserting the implant into anatomy, the implant comprising a first component rotatably coupled to a second component at a pivot point, operating a first expansion mechanism to rotate the implant at the pivot point to expand the implant to a first level, and operating a second expansion mechanism to rotate the implant at the pivot point from the first level to a second level.

An expansion member for distributing graft material through a cage and into an intervertebral space is provided. The expansion member has a central beam with an entry port in fluid communication with an exit port for distribution of the graft material. The central beam is inserted into a cage having a reversible collapse from an expanded state into a collapsed state, the expanded state forming a graft distribution window. The expanded state, for example, can be configured to open the graft distribution window which at least substantially closes upon the reversible collapse.

A variety of expandable cage improvements are provided. The cages can have a width expansion assembly that operates independently of a height expansion assembly and the wedges and ramps do not need to make contact with each other. Wedges, or movable spacers with pivotal link connections, can be used, and any portion of the cage can be expanded in width or in height in an amount that differs from other portions of the cage to provide any of a multitude of desired cage shapes. Interdigitating fingers, slidable and / or pivoting, are provided to distribute stresses over a vertebral endplate as desired.

An intervertebral implant that iterates between collapsed and expanded configurations includes first and second plates spaced from one another along a first direction and defining bone-contacting surfaces facing away from each other along the first direction. An expansion assembly is positioned between the plates with respect to the first direction and includes a first support wedge that supports the first plate and defines a first ramp and a second support wedge that supports the second plate and defines second and third ramps. The expansion assembly includes an expansion wedge defining a fourth ramp. The first, second, third, and fourth ramps are each inclined with respect to a second direction that is substantially perpendicular to the first direction. At least one of the first and second support wedges is slidable along the respective supported first or second plate. The implant includes an actuator configured to apply a drive force to the expansion wedge so as to cause 1) the fourth ramp to ride along the third ramp so as to increase a distance between the bone-contacting surfaces along the first direction, and 2) the second ramp to ride along the first ramp, thereby further increasing the distance, thereby iterating the implant from the collapsed to the expanded configuration.

Embodiments of the present disclosure include in-situ formed or in-situ-manufactured expandable cages, expandable implants, and additive-manufacturing systems for printing spinal implants in-situ, and methods for printing the same. Some embodiments may include a robotic subsystem including scanning and imaging equipment configured to scan a patient's anatomy. Some embodiments may further include an armature having a dispensing component configured to dispense at least one printing material and a controller. The controller may be configured to control the scanning and imaging equipment to determine a target alignment of a patient's spine, and develop in-situ-forming instructions including an in-situ relocation plan. In some embodiments, the in-situ-forming instructions may be based on the target alignment of the patient's spine and an interbody access space which may only partially provide access to a disc space between adjacent vertebra of the patients spine. The controller may execute the in-situ-forming instructions to form an interbody cage.

The application provides a distractible fusion cage for implanting into a vertebra from a vertebral foramen, which comprises: a front support part gradually decreasing from front to back along an X direction; a rear support part having a first state and a second state, when the rear support part is switched from the first state to the second state, two branches are distracted by the front support part; a support band ring, the front end of the support band ring is limited by the front support part, and the rear end passes through the rear support part; during the conversion of the rear support part from the first state to the second state, the front support part and the rear support part relatively move close to each other, so that the rear end of the support band ring protrudes backward relative to the rear support part, and the vertebral foramen is shielded. The support band ring of the distractible fusion cage of the application protrudes backward to shield the vertebral foramen, without the need of additional occlusion instruments, so that the loss of bone particles and bone mud from the open annular fibrosus incision into the fusion cage can be blocked, the bone graft amount of the intervertebral space is ensured, and the success rate of bone fusion is improved.

The present invention includes a novel procedure and corresponding medical devices for a Purcutaneous Spinal Interbody Fusion (PSIF). In PSIF, the surgeon performs the entire operation percutaneously without the use of a microscope, endoscope, or magnifying loupes. An adjustable retractor system is disclosed that enables the surgeon to percutaneously perform the surgery through accessing the facet joint (and later disc space) that was created by said retractor system. This retractor system provides the surgeon a safe area to work and operate without fear of damaging nerves, blood vessels, or other tissue. An expanding trial may be inserted into and removed from the disc space through the interior of the retractor system to determine the proper size for the expandable cage. The retractor system also enables the expandable cage to be inserted into the disc space.

This application provides an ablation component, a radiofrequency ablation catheter, and a manufacturing method, belonging to the field of radiofrequency ablation technology. The ablation component includes a radially contractible and expandable cage-like stent and a first ablation electrode. Along the circumference of the cage-like stent, multiple spaced-apart support arms are included. Each support arm includes a main trunk and branches. The two ends of the main trunks respectively form the proximal and distal ends of the cage-like stent. One end of each branch is connected to the main trunk, and the other end is a free end. The first ablation electrode is disposed on a branch. When the cage-like stent is in a contracted state, the extension direction of the branches is parallel to the extension direction of the main trunk. When the cage-like stent is in an expanded state, the main trunk bends outward, and the first ablation electrode adheres to the vessel wall due to the elasticity of the branches. This ablation component features a small contracted size of the cage-like stent, a simple structure, and good wall adhesion of the ablation electrode.

The present disclosure describes an intervertebral implant having a laterovertically-expanding shell operable for a reversible expansion from a collapsed state into an expanded state, the laterovertically-expanding shell having one or more connectors, and a pair of lateral extension elements that function to laterally expand the footprint of the implant within an intervertebal disc space.

An articulating plate for use with a spinal implant is disclosed. The articulating plate includes a first face and a second face. A first aperture extends between the first face and second face. The articulating plate is couplable to the spinal implant. The articulating plate is configured to translate along a longitudinal axis of the spinal implant and tilt about a lateral axis of the spinal implant.

An expandable cage for a spine includes an upper structural body, a lower structural body, a main frame having control mechanism insertion holes defined through one side and the other side in the longitudinal direction thereof, respectively, a sagittal balance control unit coupled to one side of each of the upper structural body and the lower structural body to control a sagittal balance of a spine by adjusting a spacing distance between the upper structural body and the lower structural body, and a coronal balance control unit coupled to the other side of each of the upper structural body and the lower structural body to control a coronal balance of a spine by controlling a gradient of the upper structural body and the lower structural body by lifting or lowering the other side of each of the upper structural body and the lower structural body.

A variety of expandable cage improvements are provided. The cages can have a width expansion assembly that operates independently of a height expansion assembly and the wedges and ramps do not need to make contact with each other. Wedges, or movable spacers with pivotal link connections, can be used, and any portion of the cage can be expanded in width or in height in an amount that differs from other portions of the cage to provide any of a multitude of desired cage shapes. Interdigitating fingers, slidable and / or pivoting, are provided to distribute stresses over a vertebral endplate as desired.

A cage can be positioned around a medical balloon, such as an angioplasty balloon, to assist in a medical procedure. The cage can include a plurality of strips, each extending between a set of rings including first and second rings. As the balloon expands, the first and second rings move closer together and allow the strips to expand outward. The cage may have wedge dissectors on the strips.

A delivery system (200) for administering a therapeutic agent to a target location within a vasculature includes a first catheter (210) with an expandable cage (240) at its distal end and a first occluding balloon (220). A second catheter (212) with a second balloon (230) occludes a second end of the target location. A therapeutic agent can be infused into the target location between the first balloon and the second balloon by either an infusion aperture or a weeping section (222) of the first balloon or second balloon. The system allows for precise delivery of the therapeutic agent to the target location by occluding both ends of the target area and dilating the target location with the expandable cage. The therapeutic agent is administered while the target location is in the dilated position mitigating recurrence of symptoms of occluded vessels and promoting absorption.