Abstract: A self-supporting surgical retractor is provided for retracting soft tissue and anatomy at a spinal surgical site. The retractor includes a tubular base defining an upper rim and a lower rim and a working channel there between the upper and lower rims, in which the base and lower rim are sized and configured to be seated on adjacent vertebral bodies spanning an intervertebral space. At least two elongated legs are provided, each projecting from the upper rim and each including a fixation feature at a free end thereof. Each of the legs has a length sufficient for the fixation feature to be outside the body of a patient when the lower rim is seated on adjacent vertebral bodies of the patient. The retractor is formed of a radio-transparent or radio-lucent material.

Abstract: A self-supporting surgical retractor is provided for retracting soft tissue and anatomy at a spinal surgical site. The retractor includes a tubular base defining an upper rim and a lower rim and a working channel there between the upper and lower rims, in which the base and lower rim are sized and configured to be seated on adjacent vertebral bodies spanning an intervertebral space. At least two elongated legs are provided, each projecting from the upper rim and each including a fixation feature at a free end thereof. Each of the legs has a length sufficient for the fixation feature to be outside the body of a patient when the lower rim is seated on adjacent vertebral bodies of the patient. The retractor is formed of a radio-transparent or radio-lucent material.

Abstract: The disclosed embodiments include systems for using an expander. In a first embodiment, a system includes a flow path and a gasification section disposed along the flow path. The gasification section is configured to convert a feedstock into a syngas. The system also includes a scrubber disposed directly downstream of the gasification section and configured to filter the syngas. The system also includes a first expander disposed along the flow path directly downstream from the scrubber and configured to expand the syngas. The syngas comprises an untreated syngas.

Abstract: The disclosed embodiments include systems for using an expander. In a first embodiment, a system includes a flow path and a gasification section disposed along the flow path. The gasification section is configured to convert a feedstock into a syngas. The system also includes a scrubber disposed directly downstream of the gasification section and configured to filter the syngas. The system also includes a first expander disposed along the flow path directly downstream from the scrubber and configured to expand the syngas. The syngas comprises an untreated syngas.