Abstract: A medical device with a shaft having a proximal end and a distal end, the proximal end having an operational interface, the distal end having a working element, and the shaft may include a super alloy. In one example embodiment, the shaft may include a cobalt base alloy. In another example embodiment, a medical device includes a first portion having a super alloy, and a second portion having a dissimilar metal joined to the first portion by an arc welding technique. In another possible embodiment, a first portion includes a cobalt base alloy, and a second portion includes a non-metal joined to the first portion. The inventive subject matter also includes a method for joining a cobalt base alloy to a dissimilar metal by hermetic sealing, such as provided, for example, by an arc welding technique.

Abstract: A medical device with a shaft having a proximal end and a distal end, the proximal end having an operational interface, the distal end having a working element, and the shaft may include a super alloy. In one example embodiment, the shaft may include a cobalt base alloy. In another example embodiment, a medical device includes a first portion having a super alloy, and a second portion having a dissimilar metal joined to the first portion by an arc welding technique. In another possible embodiment, a first portion includes a cobalt base alloy, and a second portion includes a non-metal joined to the first portion. The inventive subject matter also includes a method for joining a cobalt base alloy to a dissimilar metal by hermetic sealing, such as provided, for example, by an arc welding technique.

Abstract: An electrode assembly is provided having an active power element and a current return element extending through a flexible multilumen tube to be electrically insulated from each other. The active power element extends through the multilumen tube and terminates in a “J-hook” and is connected to a conductive power contact through a constructed form fit. The return element extends through the multilumen tube and directly connects to a power return contact, thus eliminating any joints in the electrical path.