66results about How to "Improve ablation efficiency" patented technology

A method and apparatus that utilizes a force-time integral for real time estimation of lesion size in catheter-based ablation systems. The apparatus measures the force exerted by a contact ablation probe on a target tissue and integrates the force over an energization time of the ablation probe. The force-time integral can be calculated and utilized to provide an estimated lesion size (depth, volume and / or area) in real time. The force-time integral may also account for variations in the power delivered to the target tissue in real time to provide an improved estimation of the lesion size. In one embodiment, the force metric can be used as feedback to establish a desired power level delivered to the probe to prevent steam popping.

A laser-ablatable element for direct laser engraving has a laser-ablatable, relief-forming layer that has a relief-image forming surface and a bottom surface. This relief-forming layer includes a laser-ablatable polymeric binder and an infrared radiation absorbing compound that is present at a concentration profile such that its concentration is greater near the bottom surface than the image-forming surface. This arrangement of the infrared radiation absorbing compound provides improved ablation efficiency, particularly when laser exposure is carried out adiabatically.

An electrosurgical ablation apparatus for generating and emitting electromagnetic radiation energy for ablating biological tissue is disclosed. The apparatus comprises an operating unit (1), a handheld applicator unit (3) with an applicator antenna (4) and a cable connection (2) between both. The applicator antenna (4) is a dual or multi-resonant ablation antenna (41a, . . . 41d) for transmitting microwave ablation energy at at least two different frequencies which are selected especially according to the electrical properties and dimensions of the tissue to be ablated.

A laser-ablatable element for direct laser engraving has a laser-ablatable, relief-forming layer that has a relief-image forming surface and a bottom surface. This relief-forming layer includes a laser-ablatable polymeric binder and an infrared radiation absorbing compound that is present at a concentration profile such that its concentration is greater near the bottom surface than the image-forming surface. This arrangement of the infrared radiation absorbing compound provides improved ablation efficiency, particularly when laser exposure is carried out adiabatically.

A method and apparatus are provided for processing a hard material, for example a hard biological material such as dental enamel or bone, with optical radiation. A treatment zone of the material is selectively cleaned of ablation products and other dirt to enhance processing efficiency, and a tip through which the optical radiation is applied to the treatment zone of the hard material is spaced slightly from the treatment zone during at least a portion of the time that hydrating fluid is being applied to the zone and / or while air or another gas is applied to the zone to clean the surface thereof.

The present invention provides a method and a system for improving the precision of element measurement based on laser-induced breakdown spectroscopy. The method comprises: press-forming a sample to be measured with a tablet press; making a hole on or immediately above a surface of the press formed sample; forming a layer of aerosol immediately above the surface of the sample to be measured with the components thereof completely identical to those of the sample to be measured; testing the sample to be measured by using a laser-induced breakdown spectroscopic system, so as to obtain the intensities of the characteristic spectral lines of a target element in the sample to be measured; and determining the concentration of the target element in the sample to be measured according to a calibration curve of the target element in prearranged calibration samples.

A method and apparatus are provided for processing a hard material, for example a hard biological material such as dental enamel or bone, with optical radiation. A treatment zone of the material is selectively cleaned of ablation products and other dirt to enhance processing efficiency, and a tip through which the optical radiation is applied to the treatment zone of the hard material is spaced slightly from the treatment zone during at least a portion of the time that hydrating fluid is being applied to the zone and / or while air or another gas is applied to the zone to clean the surface thereof.

Systems, methods, and computer program products are provided for the administration of ablation profiles during refractive surgery treatments. Basis data framework techniques enable the implementation of ablation profiles having various shapes, resulting in increased ablation efficiency when treating certain vision conditions. Exemplary basis data architecture approaches are configured to efficiently operate with annular, elliptical, and slit laser beam shapes, for example, and to account for position-dependent ablation features.

A method and apparatus that utilizes a force-time integral for real time estimation of steam pop in catheter-based ablation systems. The apparatus measures the force exerted by a contact ablation probe on a target tissue and an energization parameter delivered to the ablation probe. The exerted force and energization parameter can be utilized to provide an estimation of the probability of steam pop. In one embodiment, the force and energization metrics can be used as feedback to establish a desired contact force and energization level combination to prevent steam popping.

The invention provides a device for recording pulse laser ablation dynamic changes. The device comprises a photoelectric detector, a beam splitter, a high-speed camera and a pulse delay control generator. The beam splitter is arranged on a laser transmitting path of a pulsed laser device, part of pulse laser transmitted by the pulsed laser device is transmitted through the beam splitter and acts on a target to be ablated and the other part of the pulse laser is reflected by the beam splitter to the photoelectric detector. The photoelectric detector is connected with the pulse delay control generator which is connected with the high-speed camera. The high-speed camera is located on one side of the target to be ablated and the lens of the camera aligns with the target to be ablated. The invention further provides a method for recording pulse laser ablation dynamic changes. According to the technical scheme, the defects in the background technology are overcome, and the method is simple, easy to operate, high in recording precision, and capable of being widely applied to the field that the laser and the matter act on each other in the air or under the liquid environment condition.

The invention provides a method for improving carbon content measuring accuracy in steel, and belongs to the technical field of atomic emission spectroscopy measurement. The method comprises the following steps of puncturing a steel sample by using an ultraviolet band laser to obtain a characteristic spectrum, and fitting a function relationship of the intensities of a carbon atom spectral line and a carbon molecular spectra line and the carbon content; and correcting a residual error of the carbon content after fitting by using a partial least square method so as to obtain a calibration model of the carbon content. The method provided by the invention has the advantages that the ablation efficiency is improved by adopting the ultraviolet band laser, and a measuring signal is effectively strengthened; the information contained in a spectroscopy is fully utilized to establish the calibration model by correcting the residual error, and thus the detection limit of carbon in the steel is reduced and the measuring accuracy is improved.

The invention relates to the technical field of medical radio-frequency ablation, and in particular to an interelectrode discharge ablation device. The interelectrode discharge ablation device comprises an ablation catheter and a guide tube, wherein an ablation handle is arranged on a guide handle in a sliding mode; the ablation catheter comprises a catheter body; at least two conductive parts are arranged at the end of the catheter body; radio-frequency current, which is applied to the conductive parts, sequentially passes through one of the conductive parts, human tissues and the other conductive part, so that a closed loop is defined; the catheter body comprises a solution cavity; and a solution hole, which communicates with the solution cavity, is formed in the at least one conductive part, so that ablation liquid can be transmitted to the to-be-ablated human tissues by virtue of the solution cavity and the solution hole; therefore , stress on the ablation catheter can be monitored in an ablation process in real time, and an ablation area can be increased; with the application of an electrical stimulation method, a focus tissue can be searched; and meanwhile, operations can be facilitated.

The invention provides a novel array microwave ablation needle, which comprises an ablation needle pipe and a handle; the tail end of the ablation needle pipe is connected with the handle. The novel array microwave ablation needle further comprises array ablation needles, a fine pipe, an array control device and a push device; the fine pipe is arranged in the middle part of the inner cavity of the ablation needle pipe, and the tail end thereof crosses through a through hole of the handle; the array ablation needle is arranged in the inner cavity of the ablation needle pipe, and the array ablation needle comprises at least two ablation needles; the ablation needles are evenly distributed on the periphery direction of outside of the fine pipe, and the front end of the array control device is connected to the tail ends of the ablation needles while the back end thereof is connected with the push device. The novel array microwave ablation needle has the advantages of accurately controlling the ablation scale, not repeated preformation of interposition and ablation to cancer cells with big area, greatly improving the ablation efficiency, greatly reducing the pain of patients, greatly removing disease, and remaining health tissues; besides, the needle can clean the wound of focus, absorb impurities after ablation, so as to accelerate heeling and reduce the bacterial infection; furthermore, the novel array microwave ablation needle can ablate the burning wound to epidermis of patients.

The invention discloses a left atrial appendage occlusion and ablation device. The device includes a sealing portion located at a near end and used for closing left atrial appendage, and an anchoringportion located at a far end and used for anchoring the device in the left atrial appendage; the device is characterized in that the device also includes an ablation portion used for performing annular ablation on the inner wall adjacent to an entrance of the left atrial appendage; the device further includes the ablation portion used for performing the annular ablation on the inner wall adjacentto an opening of the left atrial appendage; the ablation portion includes an electrode and an annular skeleton used for adhering to the to-be-ablated inner wall of the left atrial appendage, and the electrode is electrically connected with a radio frequency source; and in the whole device, the annular skeleton is not insulated from a portion of the annular skeleton being in contact with the electrode, and the remaining portion is insulated at least on the outer surface of the anchoring portion. The invention provides the left atrial appendage occlusion and ablation device which is capable of simultaneously achieving occlusion and ablation of the left atrial appendage, is simple to operate, is convenient to use, and does not produce significant influence on a surgical mode and operation time.

The invention discloses a remote diagnosis and treatment system and method for tumor ablation. The remote diagnosis and treatment system for tumor ablation includes a diagnosis and treatment system and a microwave ablation treatment planning system. The diagnosis and treatment system is integrated with the microwave ablation treatment planning system, so that doctors can be helped to formulate a reasonable surgical plan through the microwave ablation treatment planning system during consultation and develop a treatment plan for a patient. The remote diagnosis and treatment system and method for tumor ablation realize convenient and effective remote medical treatment through a network, so that the complex disease of the patient can be treated through consultation at a local hospital, thereby greatly reducing a risk of aggravating the condition caused by running, saving the diagnosis time and cost of the patient and improving the diagnosis efficiency.

The invention provides a microwave ablation needle. All parts of the microwave ablation needle are made from non-magnetic materials, which can be safely used for a microwave tumor ablation technique guided by nuclear magnetic resonance imaging. The microwave ablation needle is without ionizing radiation to human body, high in image resolution, capable of imaging at any orientations, and capable ofimproving success rate of surgeries. By adopting the design of the combination of multiple rabbets of coaxial-cable and a nonmagnetic metal ring, the problem of afterheat on a needle rod tail duringheating process of the existing microwave ablation needle is eliminated, the ablation area is of almost a spherical shape which is in accordance with a majority of tumour shapes; meanwhile, accordingto different tumour shapes, the number of the rabbets, the width of the rabbets and the intervals between the rabbets can be adjusted, different ablation shapes can be obtained, and ablation efficiency can be effectively improved under the condition of without damaging normal tissues.

The invention provides a radio-frequency ablation device, system and method. The radio-frequency ablation device comprises a first duct and a second duct, wherein the first duct is nested in the second duct, and the second duct is coaxial with the first duct; at least one circular groove is formed in the wall of the first duct; a circular electrode is fixed in each circular groove; at least two deformation electrodes are arranged in a gap between the first duct and the second duct; each circular electrode and each deformation electrode are connected with a control part through electric leads; the control part controls the first duct and the at least two deformation electrodes to extend out of the second duct, controls the first duct to enter abnormal tissue, controls the at least two deformation electrodes to be attached to the outer layer of the abnormal tissue and controls alternating radio-frequency current to be produced between the at least two deformation electrodes and the at least one circular electrode, and the area of the abnormal tissue where the alternating radio-frequency current passes becomes protein. With the scheme, the ablation efficiency can be effectively improved.

The invention discloses an interelectrode discharge mapping ablation catheter and a using method thereof, wherein the catheter comprises a catheter body; electrodes are arranged on the outer surface of the catheter body; lead wires are arranged in the catheter body; the lead wires are electrically connected to the corresponding electrodes; the two or more electrodes include at least one radio-frequency current transmitting electrode and at least one radio-frequency current receiving electrode; and the electrodes are arranged at the ends of the catheter body. According to the ablation catheter provided by the invention, the at least two electrodes are arranged on the ablation catheter, so that radio-frequency current, which is transmitted to human tissues by virtue of the electrodes on the ablation catheter, passes through the electrodes, the human tissues and other electrodes, so that at least one closed loop is defined. Therefore, the ablation catheter which can implement transverse heating on the human tissues, in comparison with the prior art which can implement longitudinal heating, is larger in heating area; and ablation of focus tissues in a large area can be accelerated, ablation surgical time can be saved and ablation efficiency can be improved; therefore, patient's pain can be relieved and surgical risk can be reduced.

The invention provides an ablation plugging device which comprises a plugging piece and an energy processing system and is characterized in that the ablation plugging device further comprises a multi-electrode assembly arranged on the plugging piece, and the multi-electrode assembly is connected with the energy processing system; and the multi-electrode assembly comprises a plurality of electrode units, at least part of the electrode units are used for ablating a target tissue area, and at least part of the electrode units are used for monitoring electrophysiological signals of the target tissue area.

A method and apparatus that utilizes a force-time integral for real time estimation of steam pop in catheter-based ablation systems. The apparatus measures the force exerted by a contact ablation probe on a target tissue and an energization parameter delivered to the ablation probe. The exerted force and energization parameter can be utilized to provide an estimation of the probability of steam pop. In one embodiment, the force and energization metrics can be used as feedback to establish a desired contact force and energization level combination to prevent steam popping.

The invention discloses a left atrial appendage occlusion and ablation device. The device includes a sealing portion located at a near end and used for closing left atrial appendage, and an anchoringportion located at a far end and used for anchoring the device in the left atrial appendage; the device further includes the ablation portion used for performing annular ablation on the inner wall adjacent to an opening of the left atrial appendage; the ablation portion includes an electrode used for adhering to the to-be-ablated inner wall of the left atrial appendage, and the electrode is electrically connected with a radio frequency source; and the ablation portion is at least insulated from a portion of the ablation portion that is in contact with the electrode. The invention provides theleft atrial appendage occlusion and ablation device which is capable of simultaneously achieving occlusion and ablation of the left atrial appendage, is simple to operate, is convenient to use, and does not produce significant influence on a surgical mode and operation time.

The invention relates to a high-voltage-resistant ablation catheter, which comprises a catheter body, a flexible section is arranged at the far end of the catheter body, a head end electrode is arranged at the tip of the far end of the flexible section, at least one ring electrode is arranged on the flexible section and / or other catheter body parts, except the flexible section, of the catheter body, and the ring electrode and the head end electrode can release electric signals at the same time or independently. The electrode lead of the head end electrode and the electrode lead of the ring electrode are insulated from each other, and the head end electrode and the ring electrode are insulated from each other. Compared with the prior art, the electrode leads of the head end electrode and the ring electrode are arranged in the catheter body of the catheter, and insulation between the electrode leads and insulation between the head end electrode and the ring electrode are guaranteed, so that the head end electrode and the ring electrode can independently or simultaneously apply high-voltage ablation signals; the multiple electrodes participate in transmission of ablation energy at the same time, and therefore the ablation efficiency is improved.

The invention discloses an adsorption-type ablation catheter and an ablation device, wherein he adsorption-type ablation catheter comprises a catheter body and an electrode part which is connected to the far end of the catheter body; the part, connected to the electrode part, of the catheter body is provided with an adsorption port; and the ablation device comprises a radio-frequency source and the adsorption-type ablation catheter of the structure. According to the adsorption-type ablation catheter and the ablation device provided by the invention, electrode arms can effectively and reliably cling to focus tissues, and clinging force between the electrode part and the focus tissues can be accurately controlled and a clinging degree can be accurately judged; and in addition, superficial ablation can be implemented.

The invention relates to a multi-laser head ablation integrated control system and method. The system comprises n laser head modules and a controller, wherein the laser head modules are used for emitting light spots, and n is a positive integer greater than 1; and the controller is connected with each laser head module and used for generating working parameters according to to-be-processed objectdata information, a first control instruction is generated according to the working parameters, and each laser head module is controlled to emit the light spots according to the first control instruction. According to the multi-laser head ablation integrated control system and method, the ablation depth is large, the ablation efficiency is high, and the application range is wide.

The invention relates to the technical field of medical radio-frequency ablation, and in particular to a large-area discharge ablation device. The large-area discharge ablation device comprises an ablation catheter and a guide tube, wherein an ablation handle is arranged on a guide handle in a sliding mode; the ablation catheter comprises a catheter body; the catheter body comprises a solution cavity; at least two conductive parts, which are used for implementing electric conduction, are arranged at the end, which stretches into a human body, of the catheter body; and radio-frequency current, which is applied to the conductive parts, sequentially passes through one of the conductive parts, human tissues and the other conductive part, so that at least one closed loop is defined; therefore, stress on the ablation catheter can be monitored in an ablation process in real time, and an ablation area can be increased; with the application of an electrical stimulation method, a focus tissue can be searched; and meanwhile, operations can be facilitated.

The invention discloses a bipolar ablation system with dual perfusion and ECG output. The system comprises a single bipolar radio frequency system and a perfusion system. A control MCU in the single bipolar radio frequency system isolates a transmission controller and a radio frequency power amplifier driving circuit through a control signal. A radio frequency power amplifier circuit is connectedwith the radio frequency power amplifier driving circuit and a power amplifier power supply. A radio frequency output end is connected with a first ablation catheter output channel, a second ablationcatheter output channel and a back polar plate through a single bipolar channel switching circuit. The control MCU is connected with a filter circuit through a filter enable relay. The filter circuitis connected with an ECG analog port. The perfusion system comprises first and second perfusion pumps which are communicatively connected with the control MCU in the single bipolar radio frequency system through a perfusion pump isolation communication controller respectively. The bipolar ablation system controls the corresponding perfusion pump to output a high quality ECG signal according to different radio frequency outputs, can improve the ablation efficiency, and at the same time can reduce the surgical risk.