Abstract: An electronic computing system to generate information relating to a gait of a human. A first sensor proximate the heel detects a first location of a heel of the human at an initiation of a swing phase for a corresponding leg. A second sensor proximate the knee detects a first, concurrent, location of a corresponding knee. The system calculates a first angle ?1 defined by a vertex, A, at the first location of the knee formed by a first side, B, defined by a straight vertical line that intersects the first location of the knee and a second side, C, defined by a straight line that intersects the first location of the knee and the first location of the heel. The system then calculates a maximum flexion of the knee at the initiation of the swing phase for the corresponding leg based on the first angle ?1.

Abstract: A stem extension for surgical implants such as tibial or femoral knee implants. The stem extension is interposed between the stem and its load bearing component (i.e., tibial tray or condylar component) and angularly orients the attached stem relative to the load bearing component to facilitate positioning of the stem in the bone canal and alignment of the load bearing component with the mechanical axis of the leg. The extension includes a female taper that engages the load bearing component. The extension also includes a male taper having a longitudinal axis oriented at an angle relative to the longitudinal axis of the female taper. Engagement of the male taper with the stem thereby orients the stem at an angle relative to the longitudinal axis of the load bearing component.

Abstract: A method of actively transporting atmosphere, including gases and other fluids, to and from an inner compartment of a sealed system. The purged atmosphere is replaced with another atmosphere having target characteristics. A vacuum purge system pulls atmosphere from the sealed system, while a pressure-based system pushes atmosphere into the sealed system. Humidity corrosion tests are accelerated over prior methods because purged atmosphere is actively transported out of the sealed system and characteristic atmosphere is actively transported into the sealed system.

Abstract: A stem extension for surgical implants such as tibial or femoral knee implants. The stem extension is interposed between the stem and its load bearing component (i.e., tibial tray or condylar component) and angularly orients the attached stem relative to the load bearing component to facilitate positioning of the stem in the bone canal and alignment of the load bearing component with the mechanical axis of the leg. The extension includes a female taper that engages the load bearing component. The extension also includes a male taper having a longitudinal axis oriented at an angle relative to the longitudinal axis of the female taper. Engagement of the male taper with the stem thereby orients the stem at an angle relative to the longitudinal axis of the load bearing component.