摘要:
An implantable medical lead configured to reduce resonant currents in a resonating circuit during MRI scans and a method of manufacturing the same are disclosed herein. The method of manufacturing includes providing a medical lead comprising an electrical pathway from a tip electrode located at a distal end of the lead to a lead connector located at a proximal end and coupling a resonating circuit to the tip electrode such that the resonating circuit is in the electrical pathway for the tip electrode. Further, the method includes coupling a capacitive element to a proximal end of the resonating circuit. The capacitive element is configured to shunt at least part of an RF current induced on the electrical pathway into surrounding tissue or fluid and also works as a heat sink to spread the heat from the internal LC resonant circuit.
摘要:
An implantable lead is provided that comprises a lead body and a header assembly. The lead body has a distal end and a proximal end. The lead body is configured to be implanted in a patient. The header assembly is provided at the distal end of the lead body and includes an internal chamber and a tissue engaging end. An electrode is provided on the header assembly. The electrode is configured to deliver a stimulating pulse. A resonant inductor is located within the chamber in the header assembly. An electrically floating heat spreader is provided on the header assembly. The heat spreader is located proximate to the resonant inductor and is positioned on the header assembly to cover at least a portion of the resonant inductor. The heat spreader is thermally coupled to the resonant inductor to convey thermal energy away from the header assembly.
摘要:
An implantable lead is provided that comprises a lead body and a header assembly. The lead body has a distal end and a proximal end. The lead body is configured to be implanted in a patient. The header assembly is provided at the distal end of the lead body and includes an internal chamber and a tissue engaging end. An electrode is provided on the header assembly. The electrode is configured to deliver a stimulating pulse. A resonant inductor is located within the chamber in the header assembly. An electrically floating heat spreader is provided on the header assembly. The heat spreader is located proximate to the resonant inductor and is positioned on the header assembly to cover at least a portion of the resonant inductor. The heat spreader is thermally coupled to the resonant inductor to convey thermal energy away from the header assembly.
摘要:
An implantable lead comprises a lead connector and an electrode configured to perform at least one of a sensing operation and delivery of electrical energy. The implantable lead also includes a lead body having a proximal end portion and a distal end portion with the connector located at the proximal end and the electrode located at the distal end. The lead body of the implantable lead has a length that includes a lumen that extends longitudinally between the distal and proximal end portions. The implantable lead further includes a coil conductor that has spiral sections wound within the lumen and extend from the lead connector along the lumen. The coil conductor couples the lead connector to the electrode. The coil conductor has an insulation material provided on at least a segment of the coil conductor. The insulation material has a dielectric constant set such that the coil conductor forms a distributed band stop filter when exposed to a known RF magnetic field. The coil conductor comprises a filar wound into spiral sections to fit within and extend along the lumen in the lead. The filar of the coil conductor has an insulation coating provided thereon with the insulation coating forming a dielectric layer between adjacent spiral sections of the filar.
摘要:
An implantable lead includes a lead body having a proximal end portion and a distal end portion with a connector located at the proximal end and an electrode located at the distal end. The implantable lead further includes a coil conductor that has spiral sections wound within a lumen of the lead body and couples the lead connector to the electrode. The coil conductor has an insulation material provided on at least a segment of the coil conductor. The insulation material has a dielectric constant set such that the coil conductor forms a distributed band stop filter when exposed to a known RF magnetic field. The coil conductor comprises a filar wound into the spiral sections. The filar of the coil conductor has an insulation coating provided thereon with the insulation coating forming a dielectric layer between adjacent spiral sections of the filar.
摘要:
Implementations of the present disclosure involve an implantable medical pulse generator for administering electrotherapy via an implantable medical lead having a lead connector end on a proximal end of the lead. The pulse generator may include a can and a header coupled to the can. The header may include a lead connector end receiving receptacle for transmitting electrical pulses from the can to the lead through one or more electrical spring contacts in electrical communication with one or more terminals of the lead connector end. The one or more spring contacts may include a triangular shaped metal spring within a housing that forms an electrical contact with the lead connector end when the one or more terminals of the lead connector end is inserted into the header. Alternatively, the metal spring may take other shapes, such as, for example, circular, elliptical, or rectangular.
摘要:
A system for rapid thermal processing of a substrate in a process chamber while measuring and controlling the temperature at the substrate to establish substantially uniform substrate temperature in real time. The system includes an essentially continuous spirally-configured multizone illuminator having a plurality of substantially concentric rings of heating lamps for directing optical power toward the substrate and a fluid cooled optical reflector facing the substrate frontside and having a relatively high optical reflectivity. The illuminator can also be offset from the geometric center of the substrate. The system can also include a plurality of contact devices to provide thermal conductivity from each, or some subset, of the plurality of heating lamps. The illumination system of the present invention provides improved spatial resolution and improved thermal properties at the heating lamps.
摘要:
Implementations of the present disclosure involve an implantable medical pulse generator for administering electrotherapy via an implantable medical lead having a lead connector end on a proximal end of the lead. The pulse generator may include a can and a header coupled to the can. The header may include a lead connector end receiving receptacle for transmitting electrical pulses from the can to the lead through one or more electrical spring contacts in electrical communication with one or more terminals of the lead connector end. The one or more spring contacts may include a triangular shaped metal spring within a housing that forms an electrical contact with the lead connector end when the one or more terminals of the lead connector end is inserted into the header. Alternatively, the metal spring may take other shapes, such as, for example, circular, elliptical, or rectangular.
摘要:
A carbon nanotube fabricating system and method that includes a process chamber that supports a substrate. The system employs a high intensity thermal radiation source for heating the chamber, and a temperature regulation chuck that supports the substrate. In process, the chuck cools the substrate so as to prevent damage to the substrate, while CNT fabrication is preferably regulated to occur in a process window.
摘要:
Rapid thermal cycling of substrates in low-pressure processing environments is achieved by movable temperature conditioners located outside the processing environments. The substrates are mounted on thermally conductive pedestals for processing in the low-pressure environment. The temperature conditioners are movable both into and out of thermal contact with the pedestals outside the low-pressure environment to regulate transfers of heat through the pedestals between the substrates and the temperature conditioners. A translatable cooler block with a high thermal mass and a large interface area with the pedestal can be used as a temperature conditioner for more rapidly withdrawing heat from the substrate.