Abstract: An evaluation system for use in conjunction with a body implantable body stimulator, the body stimulator including a stimulation delivering and depolarization sensing lead system. An input connects a digitizer to the lead system, the digitizer digitizing depolarization signals sensed by the lead system. A computing system identifies excursions in the digitized depolarization signals and evaluates identified excursions in accordance with preselected merit criteria. An output gives an indication of at least that excursion having the highest merit that satisfies said merit criteria.

Abstract: A lead for a body implantable electrical stimulation system including at least one electrical conductor and electrical insulation which together define a flexible lead body. A stiffening system, in the form of a member coiled about a portion of the lead body, is provided to enhance the ability of that lead body portion to maintain its orientation in the presence of external forces, including forces imparted to the lead by movement of the body as well as gravity. Preferably, the coiled member is a multifilar member and, in a preferred embodiment, is a close wound trifilar member. The desired lead body orientation may be a straight or curved configuration and, in the latter instance, the lead body may be provided with a lumen such that the curve is extended or straightened on insertion of a stylet of sufficient stiffness.

Abstract: An encoder disc comprised of two or more stainless steel laminations, at least one of which is thinner than the others for the purpose of providing more accurately sized openings in the disc.

Abstract: A method of leak testing hermetic enclosures having a penetrable, self-sealing septum communicating with the interior thereof.Test gas is introduced into the enclosure by means of a hypodermic needle inserted through the septum and then withdrawn. Subsequent monitoring of the enclosure for presence of any escaping test gas confirms if leakage is occurring.

Abstract: Method of preparing lithium anodes contacted with organic materials prior to association of the anode with a cathode material wherein the contacted anode is first subjected to a heat treatment. Upon incorporation of the improved anode into an electrochemical battery or cell and association of the heat treated anode with a suitable cathode material, the cell may be discharged under controlled conditions for a short time prior to its usual "burn-in" discharge.