Patent ID: 8364267

Claim:
A device comprising: an implantable pulse generator that comprises electrical circuitry configured to generate an electrical pulse, a biocompatible casing that houses the electrical circuitry and on which a collection of electrodes is mounted, wherein the electrodes are in electrical contact with the electrical circuitry, and a fixation sleeve dimensioned to receive, and disposed around at least a portion of, the biocompatible casing, the fixation sleeve comprising a collection of fixation elements mounted thereon, wherein the fixation elements increase the surface area of the implantable pulse generator to reduce the likelihood that the implantable pulse generator shifts after implantation, the fixation sleeve further defining at least one electrode window in the fixation sleeve, wherein the at least one electrode window is aligned with the collection of electrodes on the biocompatible casing to expose at least one of the collection of electrodes through the at least one electrode window.