37 results about "Bipolar radiofrequency" patented technology

Methods, devices and systems for treating patent foramen ovale (PFO) involve advancing a catheter device to a position in a heart for treating a PFO, bringing tissues adjacent the PFO at least partially together, and applying energy to the tissues to substantially close the PFO acutely. Catheter devices generally include an elongate catheter body, at least one tissue apposition member at or near the distal end for bringing the tissues together, and at least one energy transmission member at or near the distal end for applying energy to the tissues. In some embodiments, the tissue apposition member(s) also act as the energy transmission member(s). Applied energy may be monoploar or bipolar radiofrequency energy or any other suitable energy, such as laser, microwave, ultrasound, resistive heating or the like.

Methods and apparatus for treatment of patent foramen ovale (PFO) provide for applying energy to tissues adjacent the PFO with a catheter device to substantially close the PFO acutely. Apparatus generally includes a catheter device having at least one energy transmission member at or near its distal end configured to apply energy to PFO tissues to acutely, substantially close the PFO. Applied energy may be monoploar or bipolar radiofrequency energy or any other suitable energy, such as laser, microwave, ultrasound, resistive heating or the like. Some embodiments of a catheter device further include one or more tissue apposition members near the distal end for helping bring PFO tissues together, such as a PFO covering member, a vacuum applying member and / or the like. PFO closure via energy-based approaches of the invention may help prevent stroke, treat migraine headache, and possibly treat or prevent other medical conditions.

Methods and apparatus for treatment of layered tissue defects such as a patent foramen ovale provide for applying energy to tissues adjacent to the PFO with a closure device that substantially closes the PFO. Apparatus generally includes an elongate flexible member having a proximal end and a distal end and an energy transmission member deployable from the elongate flexible member. The energy transmission member applies energy to the layered tissue defect at a first position and a second position adjacent to the first position so as to substantially close the layered tissue defect along at least a portion of the defect. Applied energy may be monopolar or bipolar radiofrequency energy or any other suitable energy, such as laser, microwave, ultrasound, resistive heating, direct heat energy, cryogenic or the like. PFO closure via energy-based approaches of the invention may help prevent stroke, treat migraine headache, and possibly treat or prevent other medical conditions.

Methods and apparatus for treatment of layered tissue defects having a majority of the surfaces of the defect layers in contact generally involve use of a catheter having at least one energy transmission member at its distal end. The distal end of the apparatus also typically has a force applying member which can apply a force to the tissue defect. Often this force is a lateral force or vacuum which helps the tissue to appose itself. An exemplary method of closing a patent foramen ovale (PFO) involves positioning a closure device between layers of the PFO. Energy is then applied to the layered tissue defect with the closure device so as to substantially close the tissue defect. The energy is often monopolar or bipolar radiofrequency energy. A force may also be applied by the closure device to the layered tissue defect so as to bring the layered tissue defect together.

Methods and apparatus for treatment of patent foramen ovale (PFO) provide for applying energy to tissues adjacent the PFO with a catheter device to substantially close the PFO acutely. Apparatus generally includes a catheter device having at least one energy transmission member at or near its distal end configured to apply energy to PFO tissues to acutely, substantially close the PFO. Applied energy may be monoploar or bipolar radiofrequency energy or any other suitable energy, such as laser, microwave, ultrasound, resistive heating or the like. Some embodiments of a catheter device further include one or more tissue apposition members near the distal end for helping bring PFO tissues together, such as a PFO covering member, a vacuum applying member and / or the like. PFO closure via energy-based approaches of the invention may help prevent stroke, treat migraine headache, and possibly treat or prevent other medical conditions.

A method of ablating an epicardial tissue region, including positioning a medical device adjacent the epicardial tissue region, the medical device having a first electrode, a second electrode, and a third electrode located in between the first and second electrodes; delivering an irrigation fluid to the tissue region; and ablating at least a portion of the tissue region by sequentially activating the third electrode in a monopolar radiofrequency delivery mode and activating the first and second electrodes in a bipolar radiofrequency delivery mode.

Methods and apparatus for treatment of patent foramen ovale (PFO) provide for applying energy to tissues adjacent the PFO with a catheter device to substantially close the PFO acutely. Apparatus generally includes a catheter device having at least one energy transmission member at or near its distal end configured to apply energy to PFO tissues to acutely, substantially close the PFO. Applied energy may be monopolar or bipolar radiofrequency energy or any other suitable energy, such as laser, microwave, ultrasound, resistive heating or the like. Some embodiments of a catheter device fuirther include one or more tissue apposition members near the distal end for helping bring PFO tissues together, such as a PFO covering member, a vacuum applying member and / or the like. PFO closure via energy-based approaches of the invention may help prevent stroke, treat migraine headache, and possibly treat or prevent other medical conditions.

Methods, devices and systems for treating patent foramen ovale (PFO) involve advancing a catheter device to a position in a heart for treating a PFO, bringing tissues adjacent the PFO at least partially together, and applying energy to the tissues to substantially close the PFO acutely. Catheter devices generally include an elongate catheter body, at least one tissue apposition member at or near the distal end for bringing the tissues together, and at least one energy transmission member at or near the distal end for applying energy to the tissues. In some embodiments, the tissue apposition member(s) also act as the energy transmission member(s). Applied energy may be monoploar or bipolar radiofrequency energy or any other suitable energy, such as laser, microwave, ultrasound, resistive heating or the like.

A catheter including a proximal end and a distal end. An expandable element coupled to the distal end is included, the expandable element including a proximal portion and a distal portion, the expandable element defining an exterior surface. A first plurality of electrodes coupled to the exterior surface of the distal portion of the expandable element are included, each of the first plurality of electrodes being selectively operable to transmit unipolar radiofrequency energy. A second plurality of electrodes coupled to the exterior surface of the proximal portion of the expandable element are included, each of the second plurality of electrodes being selectively operable to transmit bipolar radiofrequency energy.

A catheter including a proximal end and a distal end. An expandable element coupled to the distal end is included, the expandable element including a proximal portion and a distal portion, the expandable element defining an exterior surface. A first plurality of electrodes coupled to the exterior surface of the distal portion of the expandable element are included, each of the first plurality of electrodes being selectively operable to transmit unipolar radiofrequency energy. A second plurality of electrodes coupled to the exterior surface of the proximal portion of the expandable element are included, each of the second plurality of electrodes being selectively operable to transmit bipolar radiofrequency energy.

A device is described for treating a nasal airway by modifying a property of a nasal tissue of or near a nasal valve of the airway, without using a surgical incision or an implant, to decrease airflow resistance or perceived airflow resistance in the nasal airway. Various embodiments include an elongate shaft, a bipolar radiofrequency delivery member extending from one end of the shaft, and a handle attached to the elongate shaft at an opposite end from the radiofrequency delivery member. The radiofrequency delivery member is sized to be inserted into a nose and configured to at least temporarily deform the nasal tissue and deliver radiofrequency energy. The radiofrequency delivery member includes two rows of protruding electrodes disposed on a tissue contact surface, and the device is configured to deliver radiofrequency energy from one row of electrodes to the other row of electrodes.

Devices, systems and methods for cutting and sealing of tissue such as bone and soft tissue. Devices, systems and methods include delivery of energy including bipolar radiofrequency energy for sealing tissue which may be concurrent with delivery of fluid to a targeted tissue site. Devices include debridement devices which may include a fluid source. Devices include inner and outer shafts coaxially maintained and having cutters for debridement of tissue. An inner shaft may include electrodes apart from the cutter to minimize trauma to tissue during sealing or hemostasis. Devices may include a single, thin liner or sheath for electrically isolating the inner and outer shafts.

The invention relates to a bipolar radiofrequency intestinal tract anastomat and a working method. The anastomat comprises a near-end structure, a far-end structure and a radiofrequency energy generator, wherein the near-end structure is placed at the near end of an intestinal tract; the far-end structure is divided into a head portion and a handle portion, is located at the far end of the intestinal tract, and connects a positive pole with a negative pole of the radiofrequency energy generator through a guide wire inside the handle portion; and after the near-end structure is in butt joint with the far-end structure, the far-end structure becomes the negative pole, and a metal circular ring of the near-end structure is the positive pole. The intestinal tract is respectively sleeved on the near-end structure and the far-end structure, a portion needing anastomosis is collected to be attached to the metal circular ring of the near-end structure and a metal circular ring of the far-end structure, after sleeving, the metal circular ring of the near-end structure and the metal circular ring of the far-end structure form a circuit with the positive pole and the negative pole, intestinal tract anastomosis is completed after energization, after electricity is cut off, an internal push-type cutter is triggered through a switch of the handle portion, and residual tissue in the intestinal tract is cut off to guarantee smoothness of the intestinal tract. The anastomosis portion is continuous, operation time is short, no foreign matters are left in the intestinal tract after an operation, and safety of the anastomosis process is guaranteed.

The invention discloses a novel bipolar radiofrequency plasma knife. The novel bipolar radiofrequency plasma knife comprises a handle, a power line, a plug and an inner core; the handle comprises a main handle and an auxiliary handle, an auxiliary handle connecting column is arranged at the upper end of the main handle and internally provided with an inner core connecting mechanism, one end of the auxiliary handle is installed on the auxiliary handle connecting column, an inner core protective tube is arranged at the other end, the auxiliary handle can slide on the auxiliary handle connecting column in the axial direction, and a spring is arranged in the auxiliary handle; the inner core is inserted into the inner core protective tube, one end of the inner core is connected with the inner core connecting mechanism, and an electrode is arranged at the other end of the inner core; one end of the power line is connected with the inner core connecting mechanism, and the other end of the power line is connected with the plug. The novel bipolar radiofrequency plasma knife has the advantages of being simple in structure, convenient to operate and capable of conducting comprehensive disinfection.

A bipolar radiofrequency (RF) device for treating tissue in the presence of an electrically conductive fluid includes a headpiece and a probe. The handpiece has a motor drive, a receiving channel, and an active electrical contact on an inner wall of the receiving channel. A return electrical contact is disposed proximally of the active electrical contact on the inner wall of the receiving channel. The probe includes a proximal hub and an elongated shaft extending distally about a longitudinal axis from the proximal hub, and the hub may be inserted into and removed from the receiving channel of the handpiece. A working end of the probe is located at a distal end of the elongated shaft, and the working end includes an active electrode and a return electrode. The return electrical contact is located proximally of an active electrical contact on an outer surface of the hub. In this way, the return electrical contacts in the receiving channel and on the outer surface of the hub, respectively, and the achieve electrical contacts in the receiving channel and on the outer surface of the hub, respectively, engage each other when the hub is inserted into the receiving channel of the handpiece.

The present invention provides a bipolar radiofrequency ablation catheter comprising a working catheter and a magnetic catheter. The magnetic catheter comprises a first tube; a magnet; a first electrode; and a first electrode connector, and the working catheter comprises a second tube; a metallic element; a second electrode; and a second electrode connector. According to the present invention, it is possible to create transmural lesions more completely and easily at a thick myocardial region such as left ventricle in which a transmural lesion could not be easily created by using conventional radiofrequency ablation catheters and thus it is expected to increase the treatment efficiency for tachycardia such as ventricular tachycardia and atrial fibrillation.

The invention provides a bipolar radiofrequency treatment device with the treatment depth self-regulating function. The bipolar radiofrequency treatment device comprises a plurality of bipolar radiofrequency treatment units, each bipolar radiofrequency treatment unit comprises a radio frequency energy generator and a first radiofrequency electrode and a second radiofrequency electrodes which are uniquely connected to the radiofrequency energy generator, the first radiofrequency electrodes and the second radiofrequency electrodes are arranged on the same treatment face in a forward sequence or inverted sequence in the same direction, and the radiofrequency energy generators can exchange the polarities applied to the first radiofrequency electrodes and the second radiofrequency electrodes according to the set requirement. According to the bipolar radiofrequency treatment device, the polarities of the two radiofrequency electrodes on each bipolar radiofrequency treatment unit are controlled, the direction of radiofrequency current is controlled, and the sparse degree and penetration depth of the radiofrequency current under subcutaneous distribution can be improved, so that self-adjustment of the radiofrequency treatment depth is achieved, specific treatment is performed on some symptoms, and therefore the treatment effect and the treatment efficiency are improved.

The invention relates to the field of radiofrequency medical devices, and especially relates to a monopolar and bipolar radiofrequency ablation system capable of generating stimulation. The monopolarand bipolar radiofrequency ablation system capable of generating stimulation integrates the stimulation function with the radiofrequency function to overcome a defect that existing heart radiofrequency devices needs the stimulation function, but cannot integrates in the same device in order to make a doctor switch two functions and achieve easy use. The system also can measure the bioelectrical conduction of a measuring machine in the refractory period, and effectively improves the anti-interference ability of an ECG signal by a signal processing circuit.