11 results about "Mri compatibility" patented technology

A system for providing neurostimulation to a patient includes a pulse generator having a housing. The implantable neurostimulation lead is configured to connect with a pulse generator, and the pulse generator is configured to generate a plurality of electrical pulses for delivering neurostimulation therapy through the lead to a patient when the lead is implanted at a target location. The lead includes one or more conductors extending from a proximal end of the lead to one or more neurostimulation electrodes disposed at or near a distal end of the lead. The lead comprises an energy absorber comprising a carbon nanotube material and extending substantially along the length of the one or more conductors.

This invention discloses an electrode lead and a nerve stimulation system. The electrode lead includes a stimulation segment, a connecting segment, and an intermediate segment. The stimulation segment includes several stimulation contacts and at least one filter, one end of which is electrically connected to at least one stimulation contact. The intermediate segment includes multiple core wires, each core wire including at least one first transmission line for transmitting stimulation signals and at least one second transmission line for transmitting interference signals. The connecting segment includes several connection contacts and a consumption module. The two ends of the first transmission lines are electrically connected to the connection contacts and the filter, respectively, and the two ends of the second transmission lines are electrically connected to the consumption module and the filter, respectively. The electrode lead of this application can prevent interference signals from entering the stimulation segment, ensuring the stability of the stimulation signal output, improving the MRI compatibility of the electrode lead, and enhancing the therapeutic effect and patient comfort. In particular, it can prevent abnormal heating of the stimulation contacts, thereby avoiding damage to the patient.

The utility model relates to medical image auxiliary device field discloses a head fixing cover for nuclear magnetic resonance examination. The fixing cover includes fixed base, head cover, head fixing assembly, buffer gasket and neck support pillow, is equipped with the sliding slot on the fixed base, and the neck support pillow bottom and sliding slot sliding cooperation, the head cover is connected with the fixed base through the pivot, and is equipped with the buckle, the head cover top sets up head fixing assembly, including thread sleeve, threaded column, handle and elastic pressure cap, and the buffer gasket is attached in the head cover inner wall. All structures are made of nonmetal, nonmagnetic material. The structure can realize multidirectional stable positioning to the head, has good adjustability and MRI compatibility, and is suitable for the fixed support of head in the process of nuclear magnetic resonance examination.

The invention relates to a deep brain stimulating electrode based on carbon nanotube fibers and a preparation method thereof.The deep brain stimulating electrode based on the carbon nanotube fibers comprises a core layer, an inner skin layer and an outer skin layer which are coaxially distributed, the core layer is the carbon nanotube fibers, one end of each carbon nanotube fiber extends out of the inner skin layer to form a signal output end, and the other end of each carbon nanotube fiber extends out of the outer skin layer to form a signal output end; the inner skin layer is a graphene fiber conducting ring, and the outer skin layer is a flexible insulating ring. According to the invention, the carbon nanotube fiber is used as an inner core electrode material, so that the carbon nanotube fiber electrode has excellent conductivity, can effectively store charges, and gives large-capacity charge stimulation to the brain of an organism in a short time; meanwhile, magnetic field interference can be reduced, MRI artifacts are effectively reduced in MRI detection, MRI compatibility is improved, and the success rate and stability of an operation are improved; the flexible insulating ring provides mechanical support for the electrode, the electrode is protected from being eroded by surrounding tissue fluid in the brain, physical damage or deformation of the electrode is reduced, and the long-term stability of the electrode used in the brain is improved.

An implantable medical device, including a magnet and a body encompassing the magnet, wherein the implantable medical device includes structural components in the body configured to move away from one another upon initial rotation of the magnet relative to the body when the magnet is subjected to an externally generated magnetic field, thereby limiting rotation of the magnet beyond the initial rotation.

The invention belongs to the technical field of medical image auxiliary instruments, and particularly relates to an intelligent self-adaptive arm supporting system for magnetic resonance enhanced scanning, which comprises a skin-friendly contact layer, an intelligent response supporting layer and a rigid supporting base, and is characterized in that the intelligent response supporting layer is arranged between the skin-friendly contact layer and the rigid supporting base; a three-layer composite supporting structure is formed; the intelligent response supporting layer adopts a composite matrix composed of slow rebound memory foam and non-Newtonian fluid microcapsules; the non-Newtonian fluid micro-capsules in the intelligent response supporting layer are in a soft gel state in a normal state, when high-frequency micro-tremor happens to the arms of a patient, the non-Newtonian fluid micro-capsules are locally hardened instantly to absorb and restrain vibration, and the non-Newtonian fluid micro-capsules recover to the soft state after vibration stops; the three-layer composite supporting structure adapts to a magnetic resonance scanning environment, all composition materials are non-magnetic and non-conductive, and the magnetic resonance compatibility requirement is met.

A medical system for performing a therapeutic function on a patient comprises an implantable medical device having a switching function to switch from a normal operating mode to an MRI compatible operating mode in the presence of an MRI device, and an external device for programming at least one setting of the implantable medical device. The external device is configured, based on a programming event relating to said at least one setting, to generate a notification prompting a user to confirm a continuing MRI compatibility of said MRI compatible operating mode after the programming event and / or to amend said at least one setting for achieving MRI compatibility.

The invention relates to a stepping type pneumatically-driven small nuclear magnetic compatible navigation positioning robot, and belongs to the technical field of medical surgical robots. The invention aims to provide the pneumatic navigation positioning robot which is miniaturized, low in cost and compatible with nuclear magnetism. According to the robot, accurate motion control is achieved through air cylinder driving and a worm and gear mechanism, calculation and control of postures and positions can be achieved without installing a sensor on an end effector, nuclear magnetic compatibility is guaranteed, and system complexity and manufacturing cost are reduced; meanwhile, the whole structure is compact, the device adapts to the space limitation of a nuclear magnetic cavity, rapid deployment and adjustment in an operation are facilitated, and high-precision brain puncture navigation and positioning operation can be completed under the guidance of nuclear magnetic resonance real-time imaging.

The application relates to the technical field of medical devices, and particularly discloses an integrated ossicle prosthesis, which comprises a total ossicle prosthesis, a partial ossicle prosthesis, an anvil prosthesis and a stapes prosthesis; the total ossicle prosthesis, the partial ossicle prosthesis, the anvil prosthesis and the stapes prosthesis are integrally formed by injection molding of PEEK material, and comprise a head and a connecting rod; the connecting rod is deformable by heating. The application solves the problems of the current clinical widely used metal ossicle prosthesis, such as long-term implantation of metal ions, release of implants, high ejection rate, difficult shaping during operation, high stress shielding risk, poor MRI compatibility and the like, by integrally forming the PEEK material by injection molding. Meanwhile, the structure of the prosthesis can be adjusted by a simple heating mode to adapt to the differences in middle ear structures of different patients. The specific PEEK material is beneficial to the climbing of human soft tissues and prevents the prosthesis from falling off.

The invention discloses a multi-degree-of-freedom surgical robot with a double-implantation function and MRI compatibility. The multi-degree-of-freedom surgical robot comprises two semi-arch-shaped positioning mechanisms, two Z-axis translation mechanisms and two implantation mechanisms, wherein the two semi-arch-shaped positioning mechanisms are symmetrically arranged; the two Z-axis translation mechanisms are used for driving the two semi-arch-shaped positioning mechanisms to linearly move in the Z-axis direction respectively; the surgical robot provided by the invention can be used for DBS electrode implantation surgery, the two implantation mechanisms are respectively carried by the two mutually independent semi-arched positioning mechanisms, and mutually independent motion control of the two implantation mechanisms can be realized, so that synchronous double-implantation operation of electrodes respectively arranged on the two implantation mechanisms is completed, and the operation efficiency is improved. And the operation efficiency is greatly improved. The surgical robot also supports single implantation operation, and during single implantation operation, one semi-arched positioning mechanism is used for supporting the other semi-arched positioning mechanism, so that the unstable hidden danger caused by a cantilever structure is eliminated.

The invention discloses a magnetic resonance imaging (MRI) compatible magnet structure, implant and artificial cochlea system.The magnet structure comprises an inner magnet shell and an inner magnet assembly installed in the inner magnet shell, the inner magnet assembly comprises a center magnet, a plurality of inner magnetic beads and an inner magnet support, the magnetization direction of the central magnet is parallel to or collinear with the central axis of the inner magnet shell, and the central magnet is fixedly mounted on the inner magnet bracket; each inner magnetic bead comprises an N-pole area and an S-pole area, the inner magnet support can limit the inner magnetic beads so that the distance between the inner magnetic beads and the center magnet can be kept unchanged, and the multiple inner magnetic beads can freely rotate; through mutual cooperation of the center magnet and the rotatable inner magnetic bead structure arranged on the periphery of the center magnet, the overall attraction force is effectively improved, meanwhile, MRI compatibility is met, and therefore the magnetic bead structure can be better applied to an artificial cochlea system.