Abstract: Patient-specific guide systems and methods for performing bone resections for ankle arthroplasties comprises a bone guide body and a bone resection block. The bone guide body comprises a patient-specific surface for engaging a surface of a talus or a tibia, and a first pin hole and a first socket in the bone guide body. The bone resection block is removably insertable into the first socket, receives a first pin that can be inserted in the first pin hole, and includes a resection guide surface. The system further comprises a floating bone trial that attaches to the bone resection block via a floating bone guide. The floating bone trail receives a chamfer spacer and guide for further resecting the bone. The system further comprises a stylus for engagement with the resection guide surface to confirm resection depth. The bone guide body includes alignment pin and resection block snap lock features.

Abstract: Patient-specific guide systems and methods for performing bone resections for ankle arthroplasties comprises a bone guide body and a bone resection block. The bone guide body comprises a patient-specific surface for engaging a surface of a talus or a tibia, and a first pin hole and a first socket in the bone guide body. The bone resection block is removably insertable into the first socket, receives a first pin that can be inserted in the first pin hole, and includes a resection guide surface. The system further comprises a floating bone trial that attaches to the bone resection block via a floating bone guide. The floating bone trail receives a chamfer spacer and guide for further resecting the bone. The system further comprises a stylus for engagement with the resection guide surface to confirm resection depth. The bone guide body includes alignment pin and resection block snap lock features.

Abstract: A footplate assembly for ankle includes a footplate base; a slider arm that is rotatably coupled to the footplate base, the slider arm being configured to be couplable to external ankle instrumentation; a locking fastener configured to lock the slider arm in a chosen orientation relative to the footplate base; and a knob coupled to the footplate base having a scale to display the angle of the slider arm relative to the footplate base.

Abstract: Patient-specific guide systems and methods for performing bone resections for ankle arthroplasties comprises a bone guide body and a bone resection block. The bone guide body comprises a patient-specific surface for engaging a surface of a talus or a tibia, and a first pin hole and a first socket in the bone guide body. The bone resection block is removably insertable into the first socket, receives a first pin that can be inserted in the first pin hole, and includes a resection guide surface. The system further comprises a floating bone trial that attaches to the bone resection block via a floating bone guide. The floating bone trail receives a chamfer spacer and guide for further resecting the bone. The system further comprises a stylus for engagement with the resection guide surface to confirm resection depth. The bone guide body includes alignment pin and resection block snap lock features.

Abstract: A footplate assembly for ankle includes a footplate base; a slider arm that is rotatably coupled to the footplate base, the slider arm being configured to be couplable to external ankle instrumentation; a locking fastener configured to lock the slider arm in a chosen orientation relative to the footplate base; and a knob coupled to the footplate base having a scale to display the angle of the slider arm relative to the footplate base.

Abstract: One or more properties of a refrigerant are analyzed by evacuating a refrigerant sample vessel, drawing a refrigerant vapor sample into the vessel, and condensing the refrigerant sample within the vessel for measurement and indication of one or more desired properties of the liquid refrigerant sample. By drawing the sample refrigerant in vapor phase rather than liquid phase, the sample will be relatively free of lubricant, particulate or water contamination. The sample vessel can be readily cleaned by simple evacuation in preparation for the next measurement cycle.

Abstract: One or more properties of a refrigerant are analyzed by evacuating a refrigerant sample vessel, drawing a refrigerant vapor sample into the vessel, and condensing the refrigerant sample within the vessel for measurement and indication of one or more desired properties of the liquid refrigerant sample. By drawing the sample refrigerant in vapor phase rather than liquid phase, the sample will be relatively free of lubricant, particulate or water contamination. The sample vessel can be readily cleaned by simple evacuation in preparation for the next measurement cycle.

Abstract: Apparatus for identifying and distinguishing between at least two types of refrigerant that includes a fixed volume for containing a refrigerant sample at controlled vapor pressure. A thermistor provides a first electrical signal as a function of the combined effect of thermal conductivity and temperature of a refrigerant sample in the sample-containing volume, and a temperature sensor provides a second electrical signal as a function of temperature of the refrigerant vapor in the sample-containing volume essentially independent of thermal conductivity thereof. Associated electronics determines type of refrigerant in the sample-containing volume as a function of the first and second electrical signals, and thus as a function of thermal conductivity of the refrigerant sample independent of sample temperature. Since thermal conductivity of refrigerants at a given temperature and pressure varies for different refrigerant types, refrigerant type can be determined and displayed to an operator.

Abstract: A refrigerant handling system that includes a closed vessel for storing refrigerant and an apparatus for determining quantity of air captured within the vessel. A first sensor is operatively coupled to the vessel for providing a first electrical signal as a function of air/refrigerant vapor pressure within the vessel, and a second sensor is operatively coupled to the vessel for providing a second electrical signal as a function of air/refrigerant vapor temperature within the vessel. A microprocessor-based controller has internal memory in which electronic indicia is stored for relating saturation pressure to temperature for multiple types of refrigerant. This stored electronic indicia is employed in conjunction with the first and second sensor signals to determine quantity of air within the vessel as a function of a difference between pressure indicated by the first sensor signal and the saturation pressure indicia at the temperature indicated by the second sensor signal.