Abstract:
The present disclosure is directed to a tissue removal device. The tissue removal device may include a distal portion. The distal portion may include an outer distal portion (162) including a tissue removal tool, and an inner distal portion (132) positioned within the outer distal portion and having a closed distal end (134), a lumen, and at least one side port (122), wherein the lumen is configured to receive a medical device (104) and the inner distal portion is movable relative to the outer distal portion and the medical device.
Abstract:
Assembly (10) for positioning an electrode assembly (16) for radiofrequency ablation, comprising a first linear motion guide (11) defining a first axis of motion (103) and comprising a first carriage (111) operable to move along the first axis of motion (103), an XY positioner (12) operable to move a second carriage (123) in a two-dimensional space defined by a second axis of motion (104) and a third axis (105) orthogonal to the second axis of motion. The XY positioner is positioned relative to the first linear motion guide (11) such that the second axis of motion and the third axis are orthogonal to the first axis of motion (103). A first coupling means (125, 14) couples the electrode assembly (16) to the second carriage (123). A second linear motion guide (13) defining a fourth axis of motion (106) is disposed such that the fourth axis of motion is parallel to the second axis of motion (104). The second linear motion guide (13) comprises a third carriage (131) operable to move independently of the second carriage (123). A second coupling means (133, 15) for coupling a tissue stabilising instrument is mounted to the third carriage (131).
Abstract:
A surgical instrument includes a flexible tube defining a proximal end and a distal end. An end effector, disposed at the distal end of the flexible tube, is configured for insertion into and advancement through a body cavity to a treatment target. The end effector is adapted to connect to a source of energy. The end effector includes an expandable member which can expand from an un-expanded state to an expanded state in order to circumferentially contact a bodily treatment target. The end effector further includes at least one heating member that may hear the expandable member such that the expandable member may thermally treat tissue that the expandable member contacts.
Abstract:
An apparatus for treating inflammatory bowel diseases is provided. The apparatus includes a body and an elongate spring coil extending distally from the body and configured to be positioned within a patients colon. The elongate spring coil defines a spiral configuration and is configured to be selectively moved relative to the body. The apparatus also includes at least one electrode disposed on the elongate spring coil and configured to emit energy. The at least one electrode is moved along a spiral path in response to movement of the elongate spring coil relative to the body. A method of use for treating inflammatory bowel diseases is also provided.
Abstract:
Ablation catheters and systems include multiple inline chambers for containing and heating an ablative agent. The heating chamber includes one or more channels to increase the contact surface area of the ablative agent with the walls of the heating chamber to provide more efficient heating. Induction heating is used to heat a chamber and vaporize a fluid within by wrapping a coil about a ferromagnetic chamber and providing an alternating current to the coil. A magnetic field is created in the area surrounding the chamber which induces electric current flow in the chamber, heating the chamber and vaporizing the fluid inside. Positioning elements help maintain the device in the proper position with respect to the target tissue and also prevent the passage of ablative agent to normal tissues.
Abstract:
An electrosurgical device (10) operable to deliver microwave energy to cause targeted tissue ablation is provided. The electrosurgical device (10) comprises an antenna (26), a reflector (30), and a dielectric material (34) disposed therebetween. The selection of the dielectric material (30) and the relative positioning of the antenna (26) and the reflector (30) provide impedance matching between the antenna (26) and a transmission line (12) so as to minimize heating along the length of the device (10) during use.
Abstract:
Offenbart wird ein Elektrochirurgisches Instrument mit einem Maulteil aus gegeneinander bewegbaren Instrumentenbranchen, an deren einander zugewandten Seiten jeweils eine oder mehrere Elektrodenflächen angeordnet/ausgebildet sind, wobei die Bewegung der Instrumentenbranchen relativ zueinander durch zumindest einen auf proximale Endabschnitte der Instrumentenbranchen wirkenden proximalen Abstandshalter, zumindest einen auf einen medialen Abschnitt wirkenden medialen Abstandshalter und zumindest einen auf distale Endabschnitte der Instrumentenbranchen wirkenden distalen Abstandshalter begrenzbar ist. Erfindungsgemäß sind der proximale und/oder der distale Abstandshalter aus elektrisch nicht leitendem Material und der zumindest eine mediale Abstandshalter aus zumindest einer Elektrode aus einem elektrisch leitenden Material gefertigt sowie elektrisch leitend mit der Elektrode verbunden. Des Weiteren wirkt der zumindest eine mediale Abstandshalter mit einemlokalen Isolationsbauteil aus einem nicht leitenden Material zusammen, das in elektrisch isolierender Weise auf zumindest einer gegenüberliegenden Elektrode angeordnet ist.
Abstract:
Methods for draining pseudocysts and stent delivery systems for use therein are disclosed. An illustrative system may include a catheter shaft having an inflatable balloon affixed to a distal end region thereof. A cutting electrode may be disposed at the distal end of the system and at least one heating electrode may be disposed within the inflatable balloon. A self expandable stent may be disposed about the inflatable balloon. The stent may be formed of a shape memory polymer. The inflation fluid may be heated within the balloon to facilitate expansion of the stent.
Abstract:
Regions of tissue having reduced electrical propagation are created in a bladder to affect its electrical or mechanical properties. To create these tissue regions, a tubular device is advanced through the urethra leading to the interior of the bladder, a distal expandable structure of the device is expanded to contact the inner wall of the bladder, and electrodes or other active energy delivery elements of the device are activated to deliver ablation energy. The electrodes or other active energy delivery elements are disposed over the expandable structure which is shaped to conform to the interior of the bladder. The inner wall of the organ is ablated in a predetermined pattern. The same or other electrodes disposed over the expandable structure can used to electrically map the bladder. This map of electrical activity can be used to create the predetermined pattern.