摘要:
A method and apparatus for wireless device power management is provided. The method comprises providing a charge to an intermediate power cell by electrically connecting the intermediate power cell to a power source, disconnecting the intermediate power cell from the power source, and electrically connecting the wireless device to the intermediate power cell. Such electrical connecting enables power cell recharging within the wireless device.
摘要:
A fault tolerant modem system is provided according to some embodiments of the invention. A modem can include modulators and/or demodulators that provide redundancy in the event one of the modulators and/or demodulators fail. Connectivity between modulators and demodulators, for example, can be used to propagate TDMA timing to connected modulators and/or demodulators. Moreover, redundancy can be provided using modulators and/or demodulators with three or more input/output ports.
摘要:
A method and system delivers microwave energy to a vessel, such as a vein for the treatment of varicose veins, in a controllable heating pattern and to provide relatively fast heating and ablation of the vessel. The method and system comprises a microwave delivery device for heating the vessel, and a microwave power source for supplying microwave power to the delivery device. The method and system may also include a cooling system, a temperature monitoring, feedback and control system, an ultrasound or other imaging device, and/or a device for assuring generally uniform energy delivery in the vessel.
摘要:
A medical instrument or device is used for resonant delivery of microwave power to tissue for the purpose of resection and coagulation of vessels during surgery and/or other medical procedures. The device enables delivery of large amounts of power to tissue without the need for ground pads by accomplishing an impedance match between tissue and the characteristic impedance of the waveguide that feeds power to it. The device includes a semi-rigid coaxial cable having a center conductor which protrudes from an outer conductor by a length set to be a λ/4 (quarter-wavelength) at the frequency of excitation in the dielectric environment of the tissue of interest. The coaxial cable is shrouded by a dielectric sleeve that provides both thermal and electrical insulation. Fitted against this sleeve is a conductive sleeve whose length is set to be a λ/4 (quarter-wavelength) at the frequency of excitation in the dielectric environment of the dielectric sleeve and the shroud. The device is connected to a feed cable at its proximal end, and can be connected to a source of microwave power. A directional coupler or other wave-sampling mechanism in combination with a power sensor and feedback circuit can be used to monitor reflected power from the device during the procedure, and to control the amount of power supplied to the device.
摘要:
A cooling device comprises a thermally conductive material preferably having a large surface area, such as a plurality of fins. The cooling device clamps or slides onto an energy-introducing cannula and can exchange heat with the surrounding air, or with a coolant enclosed in a camber or shroud around the cooling device. The coolant can be circulated via a pump connected to the shroud. The device and/or shroud can be stabilized and positioned by a positioning cone or spacer. The cooling device and method reduces, minimizes or eliminates thermal effects at critical points along the cannula, while enabling the distal end of the cannula, at which treatment is occurring, to reach a temperature sufficient to kill tumor cells.
摘要:
DC/DC converter for managing high voltage gain that includes an input side having a high tap and a low tap, an output side having a high tap and a low tap, a converter circuit interconnecting the input side and the output side, and a steering branch having at least one rectifier and one of at least one winding and a capacitor. The steering branch interconnects the input side with the output side. The converter circuit is preferably selected from the following types of conventional converter circuits: buck, boost, buck-boost, Cuk, Sepic, Zeta, half bridge boost for low-line input, half bridge boost for high-line input, and half bridge boost for universal-line input. The DC/DC converter uses coupled inductor to shift the original rectifier current to an added branch and then control the rectifier current decrease rate in the new branch when rectifier turns off.
摘要:
A method and apparatus for connectivity management of a wireless device is provided, such as a wireless medical device. The method comprises providing a wireless connection between at least two medical devices, the at least two medical devices comprising a primary medical device and a secondary medical device, causing the primary medical device to transmit and the secondary medical device to receive state signals wirelessly across a plurality of communication data channels, and reporting a non-active state for one of the plurality of data channels from the primary medical device to the secondary medical device using the plurality of communication data channels.
摘要:
Methods and systems for automatically pulsing different aspiration levels to an ocular probe are disclosed. The probe may be a phacoemulsification probe. A first aspiration level, supplied by a first pump, may be applied to the probe simultaneously with ultrasonic energy. A second aspiration level, supplied by a second pump, may be automatically switched from the first aspiration level, and applied to the probe in a pulsed manner.
摘要:
Common mode (CM) noise is substantially canceled in a switching power supply circuit such as a boost converter by providing a split inductor and analyzing the switching power supply circuit as a bridge circuit formed of the switch, portions of the split inductor and parasitic capacitances of respective portions of the power supply circuit. The bridge can then be balanced by addition of capacitance in parallel with the parasitic capacitance of a respective portion of the power supply circuit or dividing the split inductor such that a ratio of inductances of respective portions of the split inductor approximates a ratio of parasitic capacitances of the respective power supply circuit portions which may be measured or otherwise empirically determined. CM noise reduction of up to 40 db can be achieved without symmetric circuit design, addition of circuit elements or complex filtering having added cost, space requirements and power losses. Further, such a reduction in common mode noise allows simple EMI filtering arrangements to be employed further reducing cost and space requirements for the power supply circuit.
摘要:
The present invention relates to systems and devices for delivering energy to tissue for a wide variety of applications, including medical procedures (e.g., tissue ablation, resection, cautery, vascular thrombosis, treatment of cardiac arrhythmias and dysrhythmias, electrosurgery, tissue harvest, etc.). In particular, the present invention relates to systems and devices for the delivery of energy with a linear array of antenna components having optimized energy delivery characteristics. In certain embodiments, methods are provided for treating a tissue region (e.g., a tumor) through application of energy with the systems and devices of the present invention.