31 results about "Indifferent electrode" patented technology

This invention provides a system and method for positioning, manipulating, holding, grasping, immobilizing and / or stabilizing a heart including one or more tissue-engaging devices, one or more suction sources, one or more fluid sources, one or more energy sources, one or more sensors and one or more processors. The system and method may include an indifferent electrode, a drug delivery device and an illumination device. The system's tissue-engaging device may comprise a tissue-engaging head, a support apparatus and a clamping mechanism for attaching the tissue-engaging device to a stable object. The system may be used during various medical procedures including the deployment of an anastomotic device, intermittently stopping and starting of the heart, ablation of cardiac tissues and the placement of cardiac leads.

An electrode catheter device with indifferent electrode for direct current tissue therapies is disclosed. An example of the catheter device has a flexible tubing with at least one ablation electrode. The catheter device also may also be used with a sheath for introducing the flexible tubing inside a patient's body. An indifferent electrode on the sheath can provide a ground for a direct current (DC) pulse to deliver electrical energy and create an electrical field adjacent a tissue. Various other embodiments are also disclosed.

An internal indifferent electrode device including a flexible shaft, an energy transmission device adapted to be inserted into the body supported on the shaft, and a connector adapted to mate with the power return connector of a power supply apparatus.

Methods and devices for forming a lesion in a target tissue having a cavity within a first RF electrode and a second RF electrode can be coupled to opposite poles of an RF current source. The second electrode can be inserted into the tissue cavity and expanded to contact the target tissue from within. The first electrode can be externally disposed against the target tissue while applying RF current between the first and second electrodes to ablate the target tissue. Some methods are directed to ablating tribiculated atrial wall tissue to treat atrial fibrillation. The second electrode can contact the tribiculated tissue directly from within to provide a direct path between the two electrodes. In some methods, the second electrode is inserted through an incision made to remove an atrial appendage. The methods can provide deeper, narrower lesions relative to those made using remote, indifferent electrodes. Atrial fibrillation ablation procedures can be performed using the invention, requiring fewer incisions than conventional methods.

A tissue cutting device includes a catheter with a window at its distal tip for admitting tissue into a catheter compartment. A cylindrical cartridge in the compartment has a cutting edge that supports an electrically conductive cutting element, e.g. a band or wire. The cutting element and adjacent tissue can be heated to a selected temperature by generating an electrical current through the cutting element. The catheter is maneuverable to position its distal end near the tissue to be cut. The catheter incorporates a dilatation balloon or other feature to urge the catheter against the tissue, so that at least part of the tissue may enter the compartment through the window. Then, the cartridge is manipulated from the catheter's proximal end to move the cutting edge across the window, cutting the tissue. According to alternative embodiments, the cartridge is either rotated or moved axially relative to the catheter and, in either event may be capable of closing the catheter window when the cut is complete. Further alternatives involve either placing an indifferent electrode on the patient and providing an RF signal via a single conductor to the cutting element for ohmic heating, or providing an RF (or a DC) current through the cutting element and two separate conductors for direct resistive heating of the cutting element.

A cardiac electrical stimulation system that enhances the ability of the system to automatically detect whether an electrical stimulus results in heart capture or contraction. The cardiac electrical stimulation system may be utilized, for example, as a cardiac pacer or as a cardioverter defibrillator. The cardiac electrical stimulation system includes an electrical stimulation circuit that attenuates polarization voltages or “afterpotential” which develop at the heart tissue / electrode interface following the delivery of a stimulus to the heart tissue, which thereby allows the stimulation electrodes to be utilized to sense an evoked response to the electrical stimulus. The cardiac electrical stimulation system utilizes the stimulation electrodes to sense an evoked response, thereby eliminating the necessity for an indifferent electrode to sense an evoked response. The present invention allows accurate detection of an evoked response of the heart, to thereby determine whether each electrical stimulus results in capture.

A cradle includes a holding portion receiving and holding a device main body of a portable electrocardiograph, a connection terminal electrically connected to an external terminal unit and connected to an output terminal provided in the device main body of the portable electrocardiograph while the device main body of the portable electrocardiograph is attached to the holding portion, and a shield portion (a right sidewall and a left sidewall) covering a negative electrode, a positive electrode and an indifferent electrode provided on an outer surface of the device main body of the portable electrocardiograph while the device main body of the portable electrocardiograph is attached to the holding portion. Thus, occurrence of an accident of electric shock possible in connecting the portable electrocardiograph having a measurement electrode provided on the outer surface of the device main body to the external terminal unit can be prevented.

The present disclosure provides neurostimulation methods and system for deep brain stimulation. A neurostimulation system for deep brain stimulation includes a burr hole plug including a cover and a base, and at least one deep brain stimulation (DBS) lead extending through an aperture defined through the base, the at least one DBS lead including at least one DBS electrode configured to apply stimulation to a subject. The system further includes an implantable pulse generator (IPG), an extension electrically coupling the IPG to the at least one DBS lead, and an indifferent electrode positioned proximate the at least one DBS electrode to facilitate reducing an area between the indifferent electrode and the at least one DBS electrode.

The present invention relates to a spinelle type nickel aluminate base metal ceramic indifferent electrode for aluminium electrolysis. Said indifferent electrode component includes nickel aluminte base metal ceramics or nickel aluminate and nickel ferrite composite metal ceramics and copper-nickel series multicomponent alloy powder, and the above-mentioned materials and undergone the process of cold-press sintering or hot pressing method so as to obtain the indifferent anode with a certain size and thickness. The purity of said aluminium product is 99.6% Al.

A cradle includes a holding portion receiving and holding a device main body of a portable electrocardiograph, a connection terminal electrically connected to an external terminal unit and connected to an output terminal provided in the device main body of the portable electrocardiograph while the device main body of the portable electrocardiograph is attached to the holding portion, and a shield portion (a right sidewall and a left sidewall) covering a negative electrode, a positive electrode and an indifferent electrode provided on an outer surface of the device main body of the portable electrocardiograph while the device main body of the portable electrocardiograph is attached to the holding portion. Thus, occurrence of an accident of electric shock possible in connecting the portable electrocardiograph having a measurement electrode provided on the outer surface of the device main body to the external terminal unit can be prevented.

An implantable electrode device designed for heart stimulation and / or cardioversion / defibrillation in connection with a pacemaker or a defibrillator. The electrode device comprises a large-surface area indifferent reference electrode pole permanently implanted in the atrial septum and in electrical communication with a pacemaker or defibrillator. The electrode pole is made from biocompatible metal braiding and has a tube like opening. The electrical communication is positioned from the pacemaker / defibrillator via the right atrium of the heart through the indifferent electrode pole into the left atrium via the opening. Thus allowing electrical pulses to be delivered to the electrode pole and stimulating the heart.