摘要:
Compression-distraction spinal fixation systems, and methods of performing compression-distraction spinal fixation, are provided that include screw-rod constructs having a ratcheting mechanism. Bone screws of the screw-rod constructs can have a pawl that engages ratchet teeth on the rod of the screw-rod construct. The bone screw can be unidirectionally ratcheted along the length of the rod to apply compressive or distractive forces. Tools for manipulation of the screw-rod constructs are also provided, which tools include distal tips configured to engage the bone screws.
摘要:
A method and a related composition for treating gastrointestinal radiation sensitivity in a subject are disclosed. The method comprises administering to the subject an agent that increases either the amount of or the activity of a fasting-induced adipose factor (Fiaf) protein in a subject. The composition comprises a first agent that increases either the amount of or the activity of a fasting-induced adipose factor (Fiaf) protein in a subject and a second agent that ameliorates at least one symptom of gastrointestinal radiosensitivity in a subject.
摘要:
An apparatus and method for creating a space of defined length, height, width and shape with a vibrating cutting apparatus in preparation for receiving an interbody spinal implant or graft of known size and configuration is disclosed.
摘要:
The invention provides compositions and methods to modulate fat storage and weight loss in a subject. In certain aspects of the invention, fat storage (adiposity) and weight loss is modulated by altering the subject's gastrointestinal microbiota population. In other aspects of the invention, fat storage and weight loss is modulated by altering the amount of or the activity of the protein, fasting-induced adipocyte factor, in the subject.
摘要:
Medical devices and kits for dynamically stabilizing or preserving motion in a spine and limiting adjacent, non-adjacent, or isolated segment degeneration of the spine while providing a controlled, determinable range of motion at the treated site, as well as methods for surgical use of the system.
摘要:
A solar cell system comprises a solar cell comprising a grid and a photo-sensitive area, wherein the grid includes a conductor, and an optical micro-structure positioned between the conductors, wherein the micro-structure covers at least a portion of the conductors.
摘要:
An intervertebral disc replacement prosthesis for placement between two adjacent vertebrae which comprises two bone cantacting members and an intermediate member with a cavity. A first bone contacting member has bone contacting surface for contacting and/or incorporating to a first vertebra and a bearing surface which substantially mates with the intermediate member. A second bone contacting member has a bone contacting surface for contacting and/or incorporating to a second vertebra, a bearing surface which substantially mates with the intermediate bearing member, and a flexible protrusion which substantially captures the intermediate bearing member and contacts and/or incorporates with the first vertebra. The flexible member may be in the form of a spring, flexible cable, or polymer.
摘要:
Ultra-compact concentrators and illuminators that approach the thermodynamic limit to optical performance can be realized with purely imaging strategies. Two-stage reflector systems where each optical surface is tailored to eliminate one order of aberration—so-called aplantic designs are described. The contours are monotonic functions that can be expressed analytically—important in facilitating optimization studies and practical fabrication. The radiative performance of the devices presented herein is competitive with, and even superior to, that of high-flux nonimaging systems. Sample results of practical value in solar concentration and light collimation are presented for systems that cover a wide range of numerical aperture.
摘要:
An optical system for a solar energy device to produce electrical energy. The optical system includes an aplanatic optical imaging system, a non-imaging solar concentrator coupled to the aplanatic system and a multi-junction solar cell to receive highly concentrated light from the non-imaging solar concentrator.
摘要:
A device for correction of a spinal deformity. In one embodiment, the device includes a cable having a first end portion, and an opposite, second end portion attachable to a vertebra, and means for adjusting the tension of the cable so as to impose a corrective displacement on the vertebra.