摘要:
PROBLEM TO BE SOLVED: To provide an apparatus for performing a microwave ablation procedure.SOLUTION: The apparatus includes a catheter 6 including an open proximal end 12 and a closed distal end configured to percutaneously access tissue. A directional microwave antenna probe 4 adapted to connect to a source 8 of microwave energy selectively couples to the catheter. The directional microwave antenna is rotatable within the catheter for directing the emission of microwave energy therefrom to tissue.
摘要:
PROBLEM TO BE SOLVED: To provide an electrosurgical device with a balun structure for air exposure of an antenna radiating section, and to provide a method of using the same.SOLUTION: An energy applicator 100 for directing energy to tissue includes: a feedline 110 having an inner conductor, an outer conductor and a dielectric material disposed therebetween; and an antenna assembly 12 having radiating sections 105, 140 operably coupled to the feedline. The energy applicator also includes: a first balun structure 108 configured to substantially confine energy to the radiating section when the energy applicator is energized and disposed in tissue; and a second balun structure configured to substantially prevent energy emitted from the radiating section from propagating proximal to the second balun structure 129 along the feedline when the energy applicator is energized but not disposed in tissue.
摘要:
PROBLEM TO BE SOLVED: To provide an electrosurgical ablation system wherein the directivity of a microwave ablation probe operably coupled to the source of microwave ablation energy is improved. SOLUTION: A directional reflector assembly 500 includes a tubular shaft having a proximal end 502 and a distal end 501 and adapted to operably engage an electrosurgical ablation probe, and a conical aperture having a proximal open apex joined to a distal end of the tubular shaft, and a distal open base, wherein an interior volume of the tubular shaft is open to the conical aperture. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a microwave ablation system for verifying correct system operation prior to high power energy delivery by a microwave antenna. SOLUTION: The microwave ablation system includes a generator operable to output energy and an ablation probe coupled to the generator that delivers the energy to a tissue region. The ablation system also includes a controller operable to control the generator and at least one sensor coupled to the ablation probe and the controller that detects an operating parameter of the ablation probe. The controller performs a system check by ramping up an energy output of the generator from a low energy level to a high energy level and monitors an output from the sensor at predetermined intervals of time during the system check to determine an abnormal state. The controller controls the generator to cease the energy output when the controller determines an abnormal state. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a radiation detector to be arranged to a microwave antenna for effectively radiating energy to the outside. SOLUTION: The radiation detector 30 provided to the microwave antenna assembly includes a receiving antenna 32 adapted to receive errant microwave energy, and a rectifier 52 adapted to rectify at least a part of the errant microwave energy. A filter is coupled with the receiving antenna 32 and coupled with the rectifier 52 to convert the rectified microwave energy into a detection signal. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a method of adjusting an ablation field radiating into tissue by which ultrasound image representative of a tissue region is acquired during energy delivery into the tissue region.SOLUTION: The method of adjusting an ablation field radiating into tissue includes the initial step of providing a handheld device including a phased antenna array and an ultrasound transducer array (910). The method includes the steps of positioning a tissue-contact surface of the handheld device adjacent to tissue (920), activating the phased antenna array to deliver energy through the tissue-contact surface to generate an ablation field in targeted tissue, activating the ultrasound transducer array to acquire ultrasound image data representative of the targeted tissue during energy delivery into the targeted tissue by the phased antenna array (930), and selectively steering the focal point of energy delivery in tissue to adjust the ablation field radiating into tissue (940).
摘要:
PROBLEM TO BE SOLVED: To provide an energy-delivery device suitable for energy delivery to tissues.SOLUTION: The energy-delivery device 10 suitable for energy delivery to tissues includes: an antenna assembly 12; a chamber defined around the antenna assembly; and a cable assembly 15 having a proximal end suitable for junction to an electrosurgical energy source. The energy-delivery device also includes a flexible fluid-cooled shaft 110 coupled in fluid communication with the chamber. The flexible fluid-cooled shaft is configured to contain the length of the cable therein and configured to remove heat along the length of the cable during delivery of energy to the antenna assembly.
摘要:
PROBLEM TO BE SOLVED: To prevent damage on an antenna and prevent a bedside doctor or a patient from being injured by strengthening the entire heating pattern of the antenna by cooling the cautery probe of a microwave apparatus.SOLUTION: The energy-delivery device 100 suitable for energy delivery to tissues includes: an antenna assembly 12; a chamber defined around the antenna assembly; and a cable 15 having a proximal end suitable for junction to an electrosurgical energy source 28. The energy-delivery device also includes a flexible fluid-cooled shaft 110 coupled in fluid communication with the chamber. The flexible fluid-cooled shaft is configured to contain the length of the cable therein and configured to remove heat along the length of the cable during delivery of energy to the antenna assembly.
摘要:
PROBLEM TO BE SOLVED: To provide a method for adjusting an intra-tissue irradiation cauterizaion area using a microwave field-detecting needle assembly.SOLUTION: The method includes the initial steps of preparing an energy irradiator 12 and preparing one or more microwave field-detecting needle assemblies 100. Each microwave field-detecting needle assembly includes one or more rectifier elements capable of detecting microwave field intensity via rectification. The method includes a step of positioning the energy irradiator 12 and the one or more microwave field-detecting needle assemblies in tissue T, a step of transmitting energy from an energy source 26 through the energy irradiator 12 to generate an irradiation cautirization area L around at least one part of the energy radiator in tissue, and a step of adjusting the irradiation cauterization area around at least the one part of the energy applicator in tissue based on at least one electrical signal transmitted by the one or more microwave field-detecting needle assemblies.
摘要:
PROBLEM TO BE SOLVED: To provide tissue ablation device capable of adjusting ablation volume. SOLUTION: An ablation device comprises: a feed line that includes an inner conductor 210 having a distal end, an outer conductor 260 coaxially disposed around the inner conductor 210 and a dielectric material disposed therebetween; an elongated electrically-conductive member 270 longitudinally disposed at the distal end of the inner conductor 210 and having a proximal end; a first balun structure B1 disposed over a first portion of the outer conductor 260 and positioned so that a distal end of the first balun structure B1 is located at a first distance from the proximal end of the electrically-conductive member; and a second balun structure B2 disposed over a second portion of the outer conductor 260 and positioned so that a distal end of the second balun structure B2 is located at a second distance from the proximal end of the electrically-conductive member 270. COPYRIGHT: (C)2011,JPO&INPIT