1449 results about "Plateau" patented technology

A system and method for creating lesions and assessing their completeness or transmurality. Assessment of transmurality of a lesion is accomplished by monitoring the impedance of the tissue to be ablated. Rather than attempting to detect a desired drop or a desired increase impedance, completeness of a lesion is detected in response to the measured impedance remaining at a stable level for a desired period of time, referred to as an impedance plateau. The mechanism for determining transmurality of lesions adjacent individual electrodes or pairs may be used to deactivate individual electrodes or electrode pairs, when the lesions in tissue adjacent these individual electrodes or electrode pairs are complete, to create an essentially uniform lesion along the line of electrodes or electrode pairs, regardless of differences in tissue thickness adjacent the individual electrodes or electrode pairs.

An article is described, including an inner surface which can be exposed to a first fluid; an inlet; and an outer surface spaced from the inner surface, which can be exposed to a hotter second fluid. The article further includes at least one row or other pattern of passage holes. Each passage hole includes an inlet bore extending through the substrate from the inlet at the inner surface to a passage hole-exit proximate to the outer surface, with the inlet bore terminating in a chevron outlet adjacent the hole-exit. The chevron outlet includes a pair of wing troughs having a common surface region between them. The common surface region includes a valley which is adjacent the hole-exit; and a plateau adjacent the valley. The article can be an airfoil. Related methods for preparing the passage holes are also described.

A system for creating lesions and assessing their completeness or transmurality. Assessment of transmurality of a lesion is accomplished by monitoring the impedance of the tissue to be ablated. Rather than attempting to detect a desired drop or a desired increase impedance, completeness of a lesion is detected in response to the measured impedance remaining at a stable level for a desired period of time, referred to as an impedance plateau. The mechanism for determining transmurality of lesions adjacent individual electrodes or pairs may be used to deactivate individual electrodes or electrode pairs, when the lesions in tissue adjacent these individual electrodes or electrode pairs are complete, to create an essentially uniform lesion along the line of electrodes or electrode pairs, regardless of differences in tissue thickness adjacent the individual electrodes or electrode pairs.

Tissue sensors house one or more sensor elements. Each element has a housing mounted substrate and a superstrate with a planar antenna between. A transitional periphery (TP) of a superstrate outer surface interconnects a base to a plateau. At least some of the TP has a generally smooth transition. Plural elements are spaced by the housing. Alternately, the superstrate TP is flat, the housing extends to the outer superstrate surface and a shield surrounds the element. The housing is flush with or recessed below the superstrate and defines a TP between the housing and superstrate. A method converts a reference signal to complex form; plots it in a complex plane as a reference point (RP); converts a measurement signal to complex form; plots it in the complex plane as a measurement point (MP); determine a complex distance between the MP and the RP; and compares complex distance to a threshold.

A prosthesis is provided for implantation into a knee joint compartment between a femoral condyle and its corresponding tibial plateau which reduces any excessive prosthesis motion. The prosthesis includes a hard body having a generally elliptical shape in plan and a pair of opposed surfaces including a bottom surface and an opposed top surface, the top surface having a first portion which is generally flat.

According to the invention, the system enables a preoperative study to be carried out wherein the tibia and/or femur is modelled on a computer (6) in 3D, the ideal cutting plane is defined and the position of the resection instruments (1, 2, 3) used to cut the bone is modelled. Additionally, according to the invention, the system enables redefinition of the ideal cutting plane and the positioning and orientation of the resection instruments (1, 2, 3) on the tibia and/or femur, in such a manner that the plane of the slot (4) of the cutting guide (3) through which the cutting tool is introduced coincides with the ideal cutting plane.

A method for performing a high tibial, dome osteotomy to adjust the lateral and/or angular disposition of the tibial plateau relative to the lower portion of the tibia, the method comprising: forming an arcuate osteotomy cut in the tibia to subdivide it into upper and lower portions; manipulating the upper and lower portions to adjust their lateral and/or angular dispositions relative to one another; forming a pair of keyholes along the osteotomy cut; forming a keyhole slot to connect the two keyholes; forming a fixation hole in the tibia for each keyhole; providing an implant comprising a pair of keys connected by a bridge, each key comprising a bore for receiving a fixation screw therein; inserting the implant so that the keys are disposed in the keyholes, and so that the bores of the keys are aligned with the fixation holes; and inserting fixation screws through the bores of the keys and into the fixation holes of the keyholes so as to stabilize the upper and lower portions of the tibia.

A method of joint arthroplasty includes obtaining an image of at least a portion of the tibial plateau. An outer periphery of at least a portion of the tibial plateau is derived based, at least in part, on the image. An implant is provided for the tibial plateau, the implant having a periphery that includes an outer edge that substantially matches the derived outer periphery of the tibial plateau.

In a method and system for processing a photographic image having lightness values, L*, representing one of the colorimetric values of an original scene, the photographic image is transformed. The transformed image has a gamma as a function of CIE 1976 L*, which includes a dark region having a rising slope, a light region having a falling slope, and a plateau region having a slope constantly within 5 percent of a maximum value in said plateau region. The rising slope is at least twice as large as the absolute value of the falling slope. The plateau region is between 10 L* and 30 L* wide. Gamma is a derivative of visually perceived reproduced CIE 1976 L* versus scene CIE 1976 L*. Gamma has a maximum slope between 1.5 and 2.0.

A prosthesis is provided for implantation into a knee joint compartment between a femoral condyle and its corresponding tibial plateau without requiring bone resection. The prosthesis includes a body having a generally elliptical shape in plan and a pair of opposed surfaces where one of the surfaces is generally concave. The body further includes an exterior portion and an interior portion, where the exterior portion is constructed from a higher modulus material than the interior portion such that the body is at least slightly deformable.

Described herein are power conservation systems and methods that reduce power consumption for an electronics device including a liquid crystal display (LCD). The LCD includes a backlight that offers multiple luminance levels, where each level consumes a different amount of power. The systems and methods alter video information while the backlight remains at a backlight luminance level. The alteration reduces luminance for the video information to produce new video information that can be presented at a lower backlight luminance level. Change to the lower backlight luminance level may then occur without significantly affecting aggregate luminance of the new video information, as perceived by a user. The LCD and electronics device consume less power at the lower luminance level.

An improved tibial plateau leveling osteotomy plate is disclosed. The plate is contoured in its proximal head portion to more closely resemble the structure of the tibial bone segment that is cut and rotated during the procedure. The plate also preferably has screw holes in the proximal head portion that are machined through the pre-contoured proximal head portion and are designed to angle the screw in a targeted screw path with respect to the osteotomy.

A cutting insert intended exemplarily for use in a face-milling cutter, has an all-around extending rake surface which changes into a plateau surface by an uninterrupted step. The step reaches its greatest height in the corner regions of the cutting insert. The rake surface defines a positive rake angle. The step prevents the produced chips from running onto the plateau surface. As a result of such a measure, a smear-on of material onto the plateau surface from a chip is prevented.

A prosthesis is provided for implantation into a knee joint compartment between a femoral condyle and its corresponding tibial plateau which is suitable for patients having large tibial defects. The prosthesis includes a hard body free of fixation within the knee joint compartment. The body has a generally elliptical shape in plan and a pair of opposed surfaces including a substantially flat bottom surface and an opposed top surface.