Abstract: In some examples, an endovascular device includes an elongated body configured to be introduced in a blood vessel of a patient and a plurality of electrodes disposed along the elongated body. The plurality of electrodes includes a first group of electrodes and a second group of electrodes. The endovascular device further includes a plurality of conductors including a first conductor electrically coupled to each electrode of the first group of electrodes and a second conductor electrically coupled to each electrode of the second group of electrodes. Each electrode of the first group of electrodes faces a first direction and each electrode of the second group of electrodes faces a second direction different from the first direction. The plurality of electrodes is configured to deliver electrical stimulation to tissue of a brain of the patient or sense a patient parameter from a location within the blood vessel.

Abstract: In some examples, an endovascular medical device includes an elongated body configured to be introduced in a cranial blood vessel of a patient and an expandable element on the elongated body. The expandable element includes a plurality of loops, wherein each loop includes one or more electrodes. The expandable element is configured to expand radially outwards from a relatively low-profile delivery configuration to a deployed configuration to position the one or more electrodes to deliver electrical stimulation to tissue of a brain of a patient or sense a patient parameter from a location within the cranial blood vessel.

Abstract: A tool component comprises abrasive compact, typically a diamond abrasive compact, having a flat working surface which presents a cutting edge and an opposite surface bonded to a surface of a cemented carbide substrate to define an interface having at least two steps. The steps extend from one surface of the component to another surface and the interface is spaced from the working surface at one of the component surfaces a greater distance than at the other component surface. The tool component has particular application as a cutting insert for a rotatable cutter of an earth boring bit.

Abstract: A tool component comprises an abrasive compact layer bonded to a cemented carbide substrate along an interface. The abrasive compact layer has a working surface, on a side opposite to the interface. This working surface is flat and presents a cutting edge or point around its periphery. A recess extends into the substrate from the interface. The recess has a side wall and a base both of which are located entirely within the carbide substrate. The recess has a portion located in the interface. The area of this portion is at least 25 percent the area of the interface. A material, different to that of the substrate, fills the recess and is bonded to the substrate. This material will typically be abrasive compact of the same type as the abrasive compact layer, or a cemented carbide which has characteristics different to that of the substrate.