Abstract: The disclosure provides gait modification or treatment apparatus, systems and methods that are appropriate for everyday life, have a significant mechanical effect, and provide a mechanism for tracking the compliance and performance of the patient to allow for individualized management of a gait modification prescription or treatment plan or sequence. Gait modification/treatment apparatus, systems and methods utilizing substantially rectilinear projections in the hindfoot and the forefoot are disclosed. Gait modification/treatment apparatus, systems and methods utilizing a projection that defines an engagement surface extending from the hindfoot to the forefoot are also disclosed. Gait modification/treatment apparatus, systems and methods utilizing a non-linear guide rail extending from the hindfoot to the forefoot are also disclosed.

Abstract: An apparatus (2) for providing a focussed visual state of a subject is disclosed. The apparatus comprises a fast focus switchable lens (6) for alternately focusing an image at (i) a first position at a first distance behind a second position and at (ii) a third position at a second distance in front of the second position, wherein the first distance is substantially equal to the second distance. A refraction correction lens system (12) adjusts the second position.

Abstract: A surgical device for joint replacement surgery includes an intraoperative joint head having a stem attachment structure where the stem attachment structure may be removably attachable to a stem and a force sensor housed by the joint head for measuring in vivo forces during surgery. The in vivo forces may be generated by one or more of tension provided by soft tissue, load application during surgery, limb movement during surgery, and a combination thereof. Also, the joint head may provide a cavity where the stem attachment structure houses the force sensor and may be removably insertable in the joint head cavity. A method of performing joint replacement surgery includes installing an intraoperative joint head having a force sensor housed by the joint head and a stem attachment structure, the stem attachment structure being removably attachable to a stem, measuring joint forces, and adjusting an implant parameter based on the measured joint forces.

Abstract: A method of implanting a prosthetic device configured to form at least a portion of a joint is provided. The method includes selecting a first component of the prosthetic device configured to be implanted in a body, determining a placement at which the first component will be fixed relative to a bone of the body, selecting a second component of the prosthetic device configured to be implanted in the body, and determining a placement at which the second component will be fixed relative to the bone. The determination of the placement of the second component is not constrained by a connection to the first component.

Abstract: A radiographic imaging system includes a penetrating radiation source including a first translating device, the first translating device comprising a first controller for positioning the radiation source. A radiation detector includes second translating device comprising a second controller for positioning the detector. A motion capture device is communicably connected to both the first and second controllers. The motion capture device tracks a position of the object being imaged and provides position information to both the first controller and second controllers for dynamically coordinating trajectories for both the radiation source and the radiation detector. The first and second translating devices preferably comprise robotic arms.

Abstract: A surgical device for joint replacement surgery includes an intraoperative joint head having a stem attachment structure where the stem attachment structure may be removably attachable to a stem and a force sensor housed by the joint head for measuring in vivo forces during surgery. The in vivo forces may be generated by one or more of tension provided by soft tissue, load application during surgery, limb movement during surgery, and a combination thereof. Also, the joint head may provide a cavity where the stem attachment structure houses the force sensor and may be removably insertable in the joint head cavity. A method of performing joint replacement surgery includes installing an intraoperative joint head having a force sensor housed by the joint head and a stem attachment structure, the stem attachment structure being removably attachable to a stem, measuring joint forces, and adjusting an implant parameter based on the measured joint forces.

Abstract: A system and method for improving the efficiency of a gas fractionalization system of the type having a compressor having an inlet for receiving air from the ambient environment. The system includes a sensor for sensing a parameter indicative of the flow of concentrated gas delivered from the gas fractionalization system to a patient. A multi-positional valve is disposed in line with the compressor for regulating the flow of air from the ambient environment into the compressor. A valve control manipulates the position of the multi-positional valve depending on the value of the parameter sensed by the sensor for regulating the quantity of air received from the ambient environment into the compressor inlet.

Abstract: A system and method for improving the efficiency of a gas fractionalization system of the type having a compressor having an inlet for receiving air from the ambient environment. The system includes a sensor for sensing a parameter indicative of the flow of concentrated gas delivered from the gas fractionalization system to a patient. A multi-positional valve is disposed in line with the compressor for regulating the flow of air from the ambient environment into the compressor. A valve control manipulates the position of the multi-positional valve depending on the value of the parameter sensed by the sensor for regulating the quantity of air received from the ambient environment into the compressor inlet.

Abstract: A system and method for improving the efficiency of a gas fractionalization system of the type having a compressor having an inlet for receiving air from the ambient environment. The system includes a sensor for sensing a parameter indicative of the flow of concentrated gas delivered from the gas fractionalization system to a patient. A multi-positional valve is disposed in line with the compressor for regulating the flow of air from the ambient environment into the compressor. A valve control manipulates the position of the multi-positional valve depending on the value of the parameter sensed by the sensor for regulating the quantity of air received from the ambient environment into the compressor inlet.

Abstract: A gas fractionalization system including a compressor for receiving air from the ambient environment and producing a flow of pressurized air, a gas separation system for producing a concentrated gas portion from the pressurized air, a valve for controlling duration during which the compressed air is delivered to the gas separation system during a pressurization cycle, and a product chamber for receiving concentrated gas produced by the gas separation system. The gas fractionalization system includes a control system that itself includes a pressure sensor for sensing the occurrence of high and low pressures within the product chamber, a processing system that determines the pressure ratio of the high and low gas pressure within the product chamber, and a valve controller that manipulates the valve, and, hence, the duration in which the flow of pressurized air is presented to the gas separation chamber based on the pressure ratio.

Abstract: An apparatus and method for starting and controlling a motor comprises a timing circuit and a main control circuit. The timing circuit initiates a start-up period upon detecting power and provides an indication of the start-up period. The main control circuit receives the indication of the start-up period and applies variable magnitudes of power to a main winding of the motor. During the start-up period, the power applied to the main winding has a fixed, substantially maximum magnitude. During a period of normal operation following, the power applied to the main winding has a user-adjustable magnitude. The start-up period duration is as long as necessary for the motor to overcome a starting load thereon. Preferably, the timing circuit has a timer measuring the start-up period and a main relay signaling the start-up period to the main control circuit.