107 results about "Micro coil" patented technology

The apparatus for deployment of a therapeutic device such as a micro-coil detachably mounts the therapeutic device to a distal portion of a pusher member. In one embodiment, the therapeutic device is detachably mounted to the distal portion of the pusher member by a tubular collar that can be heated by a heater such as an electrical resistance coil to expand the collar and release and deploy the therapeutic device. The apparatus for deployment of a therapeutic device such as a micro-coil may also provide for a pusher member and a connector fiber for securing the therapeutic device to the pusher member. The connector fiber passes through a heater within the distal portion of the pusher member, for heating and breaking the connector fiber to release the therapeutic device when a desired placement of the therapeutic device within the vasculature is achieved.

A method of forming, in or on a Si substrate, planar micro-coils with coil windings of high aspect ratio (>3) and a wide variety of geometric shapes. The micro-coils may be formed on a Si substrate and be embedded in a dielectric, or they may be formed in trenches within a Si substrate. The micro-coils may have field enhancing ferromagnetic pillars rising above the micro-coil plane, formed at positions of maximum magnetic field strength and the micro-coils may also include magnetic layers formed beneath the substrate and contacting the pillars to form a substantially closed pathway for the magnetic flux. The substrate may be thinned to membrane proportions. These micro-coils produce strong magnetic fields with strong field gradients and can be used in a wide variety of processes that involve the exertion of strong magnetic forces at small distances or the creation of magnetic wells for trapping and manipulating small particles.

This invention relates generally to detection devices having one or more small wells each surrounded by, or in close proximity to, an NMR micro coil, each well containing a liquid sample with magnetic nanoparticles that self-assemble or disperse in the presence of a target analyte, thereby altering the measured NMR properties of the liquid sample. The device may be used, for example, as a portable unit for point of care diagnosis and / or field use, or the device may be implanted for continuous or intermittent monitoring of one or more biological species of interest in a patient.

This invention relates generally to detection devices having one or more small wells each surrounded by, or in close proximity to, an NMR micro coil, each well containing a liquid sample with magnetic nanoparticles that self-assemble or disperse in the presence of a target analyte, thereby altering the measured NMR properties of the liquid sample. The device may be used, for example, as a portable unit for point of care diagnosis and / or field use, or the device may be implanted for continuous or intermittent monitoring of one or more biological species of interest in a patient.

A method of forming, in or on a Si substrate, planar micro-coils with coil windings of high aspect ratio (>3) and a wide variety of geometric shapes. The micro-coils may be formed on a Si substrate and be embedded in a dielectric, or they may be formed in trenches within a Si substrate. The micro-coils may have field enhancing ferromagnetic pillars rising above the micro-coil plane, formed at positions of maximum magnetic field strength and the micro-coils may also include magnetic layers formed beneath the substrate and contacting the pillars to form a substantially closed pathway for the magnetic flux. The substrate may be thinned to membrane proportions. These micro-coils produce strong magnetic fields with strong field gradients and can be used in a wide variety of processes that involve the exertion of strong magnetic forces at small distances or the creation of magnetic wells for trapping and manipulating small particles.

A microvalve which utilizes a low temperature (<300° C.) fabrication process on a single substrate. The valve uses buckling and an electromagnetic actuator to provide a relatively large closing force and lower power consumption. A buckling technique of the membrane is used to provide two stable positions for the membrane, and to reduce the power consumption and the overall size of the microvalve. The use of a permanent magnet is an alternative to the buckled membrane, or it can be used in combination with the buckled membrane, or two sets of micro-coils can be used in order to open and close the valve, providing the capability for the valve to operate under normally opened or normally closed conditions. Magnetic analysis using ANSYS 5.7 shows that the addition of Orthonol between the coils increases the electromagnetic force by more than 1.5 times. At a flow rate of 1 mL / m, the pressure drop is <100 Pa. The maximum pressure tested was 57 kPa and the time to open or close the valve in air is under 100 ms. This results in an estimated power consumption of 0.1 mW.

A persistent-mode magnet, assembled from superconducting annuli, provides a micro coil NMR, in which compactness and manufacturability are provided for a variety of applications. An annular magnet for micro NMR can include a YBCO-annulus Helmholtz coil, for example, that can energized by a magnet system and then transported for use at a second location with an operating system.

Provided is a GMR-MEMS integrated weak magnetic sensor adopting a plane micro-coil. The base of a micropressure bridge comprises a first base and a second base, the base is fixedly arranged on a spacer, the spacer is fixedly arranged on an insulating substrate, and a bridge body is connected between the first base and the second base. A piezoelectric patch is arranged on the bridge body and between the first base and the second base. A GMR sensitive element is arranged below the bridge body and is symmetrically arranged, magnetic force line collector in the GMR sensitive element comprises a first magnetic force line collector and a second magnetic force line collector, clearance is reserved between the first magnetic force line collector and the second magnetic force line collector, GMR resistors comprises a first GMR resistor, a second GMR resistor, a third GMR resistor and a fourth GMR resistor, the first GMR resistor, the second GMR resistor, the third GMR resistor and the fourth GMR resistor form a Wheatstone bridge, the first GMR resistor is located in the first magnetic force line collector, the second GMR resistor is located in the second magnetic force line collector, and the third GMR resistor and the fourth GMR resistor are located in the clearance. A modulation film is connected on a position, opposite to the modulation film, on the bridge body. The GMR-MEMS integrated weak magnetic sensor adopting the plane micro-coil has the advantages of being simple in structure, low in noise, low in cost, low in hysteresis and the like.

The invention discloses a T-shaped positioning device adopting 3D printing in an intrathoracic endoscopy and a manufacturing method thereof. The T-shaped positioning device is of a T-shaped structure adopting the 3D printing and comprising a vertical section and a horizontal section, wherein the upper end of the vertical section and the middle of the horizontal section are intersected at a certain angle, a hollow tube communicated with the surface of the horizontal section is arranged in the vertical section, the lower end of the vertical section is closed, and a nidus marking device connected with the hollow tube is arranged on the vertical section. When the T-shaped positioning device is used, the positioning device is arranged and fixed in the thorax of a patient in a conformal mode and marks the ground-glass node position of the lung through the nidus marking device. The T-shaped positioning device avoids the problem that a node and a hook-wire cannot be touched by adopting a method of touching by hand or a micro-coil is unhooked or falls into the thoracic cavity, the CV exposure to the patient and the working amount of a medical worker are decreased, and meanwhile the influence on the ribs or shoulder blades due to dissection is eliminated.

The invention discloses an intrathoracic L-shaped positioning device adopting 3D printing in an endoscopy and a manufacturing method thereof. The L-shaped positioning device is an L-shaped hollow tube adopting the 3D printing and comprises a vertical section, an elbow and a horizontal section, wherein a head end fit with the top face of the thorax of a patient is arranged at the top of the vertical section, the tail end of the horizontal section is closed, and a nidus marking device connected with the hollow tube is arranged on the horizontal section. When the intrathoracic L-shaped positioning device is used, the positioning device is arranged and fixed in the thorax of the patient in a conformal mode and marks the ground-glass node position of the lung through the nidus marking device. The L-shaped positioning device avoids the problem that a node and a hook-wire cannot be touched by adopting a method of touching by hand or a micro-coil is unhooked or falls into the thoracic cavity, the CV exposure to the patient and the working amount of a medical worker are decreased, and meanwhile the influence on the ribs or shoulder blades due to dissection is eliminated.