55 results about "Radiofrequency ablation device" patented technology

A RF ablation device includes a probe assembly that has an elongate cannula having a lumen disposed interiorly of an external wall of the cannula. The elongate cannula includes a plurality of slots formed within the external wall that provide access to the lumen. The probe assembly includes an electrode member that is slidably disposed within the elongate cannula, the electrode member including a plurality of tines configured for passage through the plurality of slots. The slots are disposed in a staggered arrangement or pattern about the external wall of the cannula. The staggered arrangement of slots may be used in a monopolar or bipolar arrangement of the electrodes on the cannula. A bipolar arrangement of electrodes using the staggered configuration produces larger ablation areas in a shorter period of time as compared to prior designs.

A radiofrequency ablation device reduces the incidence of skin burns by selectively activating ground pads in a partially sequential and partially contemporaneous manner. The selective sequential activation of the ground pads lowers power dispersion at each ground pad relative to contemporaneous activation of ground pads and/or sequential activation of ground pads. This reduction in power dispersion at each ground pad consequently yields a lower overall maximum temperature, and more uniform heating of all of the ground pads. This makes the system more predictable and safer for use in treatment. The radiofrequency ablation device may include a layered ground pad that includes at least two layers of material. One layer of material can be substantially similar to the material used for a monolithic ground pad, and one layer can have a substantially lower relative electrical conductivity, but a substantially higher electrical conductivity relative to adjacent body tissue. Alternatively, a ground pad may include multiple conductive zones that are activated using the same selective sequential activation scheme.

The invention discloses a radiofrequency ablation instrument, and a method and device for control of the radiofrequency ablation instrument. The radiofrequency ablation instrument comprises a temperature detection controller, a radiofrequency detection controller, a main controller, a radiofrequency power controller, a radiofrequency power amplification circuit and a power source device, wherein the temperature detection controller is used to acquire temperature data of a target object; the radiofrequency detection controller is used to acquire radiofrequency data of the target object; the main controller is used to generate a control signal according to the temperature data and the radiofrequency data; according to the control signal, the radiofrequency power controller controls the radiofrequency power amplification circuit to output radiofrequency energy via an ablation device; and the power source device provides working voltages for the main controller, the temperature detection controller, the radiofrequency detection controller, the radiofrequency power controller and the radiofrequency power amplification circuit. According to the invention, the collected temperature data and the collected radiofrequency data are used to calibrate the radiofrequency energy output by the radiofrequency power amplification circuit, so that the radiofrequency energy output by the radiofrequency ablation instrument can be controlled accurately.

The invention provides a system and method for a practitioner to interact remotely with a radiofrequency ablation device via a graphical user interface (GUI) which displays a hierarchical system of menu and submenu choices prior to and during a surgical procedure to ablate and coagulate a tissue mass such as a fibroid tumor without breaking the sterile field of the surgical procedure. The inventive system comprises an ablation device, a computer software program, a GUI, a navigational tool for scrolling and selecting through a series of menu and submenu choices by the practitioner displayed on the GUI, and a foot pedal used by the practitioner for operating the ablation device to ablate and coagulate a tissue mass of a patient. The menus and submenus allow for entry of patient data as well as for the control of certain parameters and operation of the ablation device.

The invention relates to an electrical ablation balloon radiofrequency catheter in the percutaneous renal artery. The electrical ablation balloon radiofrequency catheter comprises a catheter, an electrical ablation balloon and an ablation electrode plate, wherein the tail part of the catheter is provided with a connector, the head end of the catheter is provided with the electrical ablation balloon, the electrical ablation balloon is communicated with a contrast agent filling pipeline through the catheter, the contrast agent filling pipeline is arranged in the catheter and passes through the connector to be connected with a pressure pump with contrast agents, the outer surface of the electrical ablation balloon is provided with the ablation electrode plate in spiral arrangement, the ablation electrode plate is connected with a radiofrequency ablation instrument through a conducting wire, and the conducting wire is embedded in the catheter, enters the connector from the tail part of the catheter and extends out from a port of the connector. The electrical ablation balloon radiofrequency catheter has the advantages that the operation is simple and convenient, the positioning is precise, the leaning is reliable, and the manual error and the operative complications possibly generated in the operation process are reduced to the greatest degree.

A radiofrequency ablation device includes an elongate cannula having a distal portion and a proximal portion and a lumen extending between the distal and proximal portions. The RF ablation device further includes an elongate tubular member disposed within the lumen of the elongate cannula, the elongate tubular member having a distal region and a proximal region, the elongate tubular member including a lumen extending between the distal and proximal portions. A sildable electrode member is disposed in the portion of the elongate cannula lumen located external to the elongate tubular member. As an alternative to the elongate tubular member, the electrode member may include a lumen. The lumen of the elongate tubular member (or electrode member) carries or vents gaseous vapor generated during the RF ablation process.

The invention provides a radio-frequency ablation method and a radio-frequency ablation system, wherein the method comprises the following steps: acquiring needle tip temperature which is obtained when executing temperature of an ablation region is acquired by virtue of a radio-frequency ablation instrument through an ablation needle, and acquiring a temperature difference image which is obtainedby scanning the ablation region by virtue of magnetic resonance equipment and comprises the position of the ablation needle; based on the needle tip temperature and the temperature different image, calculating peripheral temperature of the ablation region; and continuing to execute an ablation operation when the peripheral temperature cannot meet an ending condition, and stopping the ablation operation when the peripheral temperature meets the ending condition. According to the embodiment, the peripheral temperature of the ablation region is determined on the basis of the needle tip temperature acquired by virtue of the radio-frequency ablation instrument and the temperature difference image which is scanned by virtue of the magnetic resonance equipment, and subsequently, on the basis of the peripheral temperature, it can judge whether the ending condition is satisfied or not, so that the purpose of implementing thorough ablation on the ablation region is achieved.

The invention discloses a radiofrequency ablation probe for a cavity organ and a manufacturing method thereof. According to the radiofrequency ablation probe, radiofrequency energy is effectively applied to the cavity-type organ and controlled. The radiofrequency ablation probe comprises a connecting cable assembly used for being connected with a radiofrequency generator, a handle and an ablation catheter assembly. The connecting cable assembly is composed of a radiofrequency connector used for being connected with a radiofrequency ablation instrument and a cable containing a radiofrequency ablation wire and a thermocouple connecting wire. An open hole is formed in the middle of the handle to be connected to a guiding catheter inside the ablation catheter assembly of the probe. The ablation catheter assembly comprises a probe catheter, a sectioned metal coil, a thermocouple, an LED assembly, the guiding catheter, a coil carrying tube, a surface isolation tube and an end sealing tube. One end of the probe catheter is connected with the handle, and the other end of the probe catheter is connected with the coil carrying tube in a lapping mode. One end of the handle is connected with the probe catheter, and the other end of the handle is connected with the connector through the wire. The manufacturing method of the radiofrequency ablation probe comprises the step that the radiofrequency ablation catheter assembly, the handle and the connecting cable assembly are manufactured and connected in sequence.

The invention relates to a control method and system for a radio frequency ablation instrument. The control method includes: acquiring the first input information in real time while a radio frequencyablation instrument is in a first mode, and switching the radio frequency ablation device from the first mode to a second mode when the first input information satisfies a first preset condition; acquiring the second input information in real time, and switching the radio frequency ablation instrument from the second mode to a third mode when the second input information satisfies a second presetcondition; acquiring the running time of the current third mode in real time, comparing the running time of the third mode with the preset running time, switching the radio frequency ablation instrument from the third mode to the second mode while the running time of the third mode reaches the preset running time; acquiring the first input information in real time, and switching the radio frequency ablation instrument from the second mode to the first mode while the first input information satisfies a third preset condition. The problem of manual adjustment can be solved, and accurate and stable control of the radio frequency ablation instrument can be completely and intelligently performed.

The invention provides a corrugated radiofrequency ablation catheter and a radiofrequency ablation device. The corrugated radiofrequency ablation catheter is provided with an elongated connecting catheter body, an electrode holder is arranged at the front end of the connecting catheter body, and a control handle is arranged at the rear end of the connecting catheter body; the electrode holder is a corrugated electrode holder composed of one or more corrugations, and one or more electrodes are distributed on the corrugations; a slidable supporting wall-attached adjusting wire is arranged in one tubular cavity of the electrode holder and the connecting catheter body, and is divided into a flexible section away from the control handle and a rigid section close to the control handle. The shape of the corrugated section of the catheter is changed without the aid of other equipment by forwards feeding or backwards pulling the supporting wall-attached adjusting wire, difficulty in that the radiofrequency ablation catheter enters a guiding catheter/sheath is lowered greatly, great convenience is brought to the corrugated electrode holder to move in the target tubular cavity, operation is facilitated, and the structure is simple.

Embodiments of the invention provide a radio frequency heating probe device and a radio frequency ablation device, the radio frequency heating probe device comprises: a probe head, a liquid metal, a flexible probe conduit, a curvature adjusting member, a heat exchange member and a pumping member, the liquid metal is driven by the pumping member to circulate through the loop composed of the flexible liquid inlet conduit, the probe head, the flexible liquid outlet conduit and the heat exchange member, and the curvature adjusting member is arranged in the flexible probe conduit and is used for adjusting the curvature of the flexible probe conduit. The radiofrequency heating probe device and the radiofrequency ablation device provided by the embodiments of the invention adopt a flexible and foldable probe tube structure and control the folding degree of the probe tube by changing the temperature of the resistance wire, so that the radiofrequency heating probe device and the radiofrequencyablation device can be better adapted to the cardiac environment of a human body; and, through the liquid metal circulating in the conduit, the probe head temperature is effectively prevented from being too high, and the corrosion of the traditional cooling medium to the probe head can be avoided.

The invention provides a radiofrequency ablation device, which comprises a sleeve unit, a radiofrequency ablation assembly and a liquid supply assembly. Wherein the sleeve unit comprises an inner tube and an outer tube which are nested and fixedly connected inside and outside, a cavity is defined between the inner tube and the outer tube, and a through hole is formed in a section side wall of the cavity, the side wall of the cavity is used for stretching into the body of a patient, and the through hole is used for communicating the cavity with the outside; an input port communicated with the cavity is formed in the section, used for remaining outside the body of the patient, of the sleeve unit; the radiofrequency ablation assembly comprises an electrode needle, and the electrode needle is used to pass through an inner hole of the inner tube; the liquid supply assembly comprises a liquid storage unit and a heating unit, the heating unit is used for heating liquid in the liquid storage unit, a communicating pipeline is arranged between the liquid storage unit and the input port, and the communicating pipeline is used for conveying the liquid into the cavity by the liquid storage unit. The radiofrequency ablation device can rapidly stop bleeding, and the risk that a tumor is planted and diffused along a needle passage is reduced.

The invention provides a radiofrequency ablatograph which comprises a radiofrequency ablatograph body and pedal plates used for controlling the output number of radiofrequency currents. The pedal plates comprise an upper pedal plate used for being treaded and a lower pedal plate used for supporting the upper pedal plate, and the upper pedal plate is hinged to the lower pedal plate through a fixing shaft. The pedal plates further comprise an elastic component, and the upper pedal plate and the lower pedal plate are fixedly arranged at opposite positions through the elastic acting force of the elastic component. The pedal plates further comprise a variable resistor and a circuit used for communicating the variable resistor to the radiofrequency ablatograph body, and the position of the variable resistor is arranged as follows: when the upper pedal plate rotates around the fixing shaft and towards the lower pedal plate, the rotation of the upper pedal plate drives the resistance value of the variable resistor to be changed. A suction cup is further arranged on the bottom face of the lower pedal plate. The invention further provides a radiofrequency ablation system.

The invention relates to a radiofrequency ablation device for tumors. The radiofrequency ablation device comprises a needle tube, a needle tip, a fixed handle, an electrode needle, an electrode pushing rod and a rotary rod, wherein the inner left part of the needle tube is fixedly provided with a cylindrical guiding part, the middle of the cylindrical guiding part is provided with a first channel along the axial direction, a plurality of second channels are arranged along the axial circumferential direction, and the left end of each second channel is outwards bent; the needle tip is of a cone shape, is fixedly arranged on the left end of the needle tube and is provided with a fourth channel and a fifth channel, wherein the fourth channel and the fifth channel independently correspond to the first channel and the second channel, a master electrode needle penetrates out of the tip end of the needle tip in a straight line way, and slave electrode needles penetrate out of the side surface of the needle tip to carry out outward divergent distribution; the fixed handle is integrally of a cylinder shape, and the left end of the fixed handle is fixedly connected with the needle tube; the electrode needle comprises the master electrode needle and the slave electrode needles, wherein the right end of the master electrode needle and the right ends of the slave electrode needles are fixedly connected with an electrode needle seat, the master electrode needle is a tube-shaped needle, and the electrode needle is electrically connected with an electrical plug; the left end of the electrode pushing rod is fixedly connected with the electrode needle seat; and the left end of the rotary rod is rotatably hinged to the right end of the electrode pushing rod.

The invention relates to a radio frequency ablation device, which comprises a transmission pipe and a plurality of ablation arms, wherein the plurality of the ablation arms are respectively connectedwith the transmission pipe, jointly enclose a ring shape, and are respectively provided with an ablation member, the ablation members are electrically connected with ablation lines, and the ablation lines are arranged in the ablation arms and the pipe wall of the transmission pipe in a penetrating manner, and are used for connecting radio frequency equipment. According to the invention, when the radiofrequency ablation device is used for an atrial fibrillation treatment operation, the ablation sections of the multiple transmission pipes are guided to be attached to the pulmonary vein opening to form ring-forming ablation, so that the operation is easy and convenient, the ablation operation time can be greatly shortened, wide popularization is facilitated, and the operation requirements ofvast atrial fibrillation patients are met; and the radio frequency ablation device can isolate pulmonary vein electric signals and can also improve the vegetative nerve plexus outside the pulmonary vein opening to a certain extent so as to further improve the effectiveness of atrial fibrillation ablation operations.

The invention discloses a magnetic resonance compatibility radio-frequency ablation apparatus and an ablation needle. The ablation apparatus comprises a control module for generating radio-frequency signals, a power module for generating energy, a magnetic compatibility display for conducting display in a magnetic resonance room, a mouse for operating magnetic compatibility and the individual multi-stage ablation needle of compatibility. With the application of the apparatus, by virtue of the mouse and the display, the ablation apparatus can be regulated and controlled by a doctor through a human-computer interaction interface, and magnetic resonance real-time imaging is implemented to judge an ablation process, so that an ablation effect is enhanced and patient's pain is reduced; alternating current is converted into direct current and is supplied; a control board is in charge of controlling output power, and primary filtering is conducted; by virtue of an amplifying plate, the radio-frequency signals are amplified into the radio-frequency energy applicable to ablation; by virtue of a display plate, ablation time, ablation temperature and ablation power are displayed; and the ablation needle is injected with physiological saline in an ablation process, so that an ablation area is improved.

The invention belongs to the technical field of radio frequency medical treatment, and particularly relates to an electrically controllable radiofrequency ablation device with a variable radiation direction. The electrically controllable radiofrequency ablation device comprises a phased array radar and arrayed radiofrequency ablation needle heads, and the arrayed radiofrequency ablation needle heads are scanned through the phased array radar so as to perform radiation output. The phased array radar comprises a switch array and a Butler matrix circuit based on a substrate integrated waveguide, and during radiation output, an input port of the Butler matrix circuit is selected through the switch array to perform direction bias on radiation output. According to the electrically controllable radiofrequency ablation device with the variable radiation direction, the Butler matrix circuit based on the substrate integrated waveguide is adopted to perform phase deviation on an output wave beam, so that the action direction is changed under the condition that an instrument does not need to be moved, a coverage area is increased, the defects during use of a single needle are effectively avoided, various clinical requirements are effectively met, and meanwhile, the Butler matrix based on the substrate integrated waveguide, which is variable in electric control, is realized through an electrochromic device.

The invention relates to the technical field of medical equipment, in particular to a hole cutting type non-implanted atrial shunt device. The device comprises an outer tube and an inner tube arrangedin the outer tube, wherein the end part of one of the outer tube and the inner tube is connected with an ablation assembly; the other end of the other of the outer tube and the inner tube is connected with an anastomosis assembly; the ablation assembly is connected with a radio frequency ablation instrument; and when the inner tube and/or the outer tube are/is moved, and the ablation assembly andthe anastomosis assembly move oppositely to cut an atrial septum located between the ablation assembly and the anastomosis assembly. A hole is formed in a radio frequency mode by using the ablation assembly and the anastomosis assembly, and the formed hole is not prone to being closed again and allows left atrial blood pressure to be effectively guided to the right atrium, so the purpose of treatment is achieved.

The invention provides a use method of a radiofrequency ablation device. When a catheter radiofrequency ablation operation is started, the initial impedance value of the heart of a patient is detected and recorded as a, the change impedance value on a radiofrequency ablation instrument is set as b, and the change time zone on the radiofrequency ablation instrument is set as c; in the catheter radiofrequency ablation operation process, the heart impedance change rate delta d of the patient on the radiofrequency ablation instrument is observed in real time; when the catheter for catheter radiofrequency ablation performs continuous radiofrequency ablation on the heart of the patient, when the time is not longer than the change time zone c and the change rate delta d of the impedance value of the heart of the patient in real time is larger than the change impedance value b, the radiofrequency ablation action is stopped immediately; after ablation is stopped, the position of the catheter for catheter radiofrequency ablation in the heart continues to be transferred, and the heart area where the change rate delta d of the real-time patient heart impedance value is larger than the change impedance value b is avoided. According to the method, tiny gas explosion of heart tissues can be avoided, and the operation safety is improved.