University of Texas System

About: University of Texas System is a education organization based out in Austin, Texas, United States. It is known for research contribution in the topics: Cancer & Population. The organization has 13901 authors who have published 10925 publications receiving 319328 citations. The organization is also known as: UT System.

Curved cannula for continuous spinal anesthesia

Abstract: A substantially straight over-the-needle catheter comprising memory material and having a deviated tip may be packaged, shipped and stored for use in a deviated state so as to preserve the material memory. In preparing for use, the catheter is temporarily straightened using a catheter shield, after which a substantially straight inner needle is inserted (optionally through a guide needle). The catheter shield is removed prior to insertion of the catheter with its inner needle into a space within an anatomic structure. Subsequent removal of the inner needle allows the catheter to assume its deviated shape within the anatomic structure. The deviated catheter tends to be well retained in an anatomic structure, tends to reduce leakage of fluids from within the anatomic structural space, and allows predictable direction of fluid flow injected within the anatomic structural space.

The pathology of head and neck tumors: spindle cell lesions (sarcomatoid carcinomas, nodular fasciitis, and fibrosarcoma) of the aerodigestive tracts, Part 14

Abstract: The term spindle cell lesion, or tumor, is a purely descriptive one and if applied without further qualification is meaningless as a guide to therapy and prognosis. The three lesions presented in this report--sarcomatoid carcinomas, nodular fasciitis, and fibrosarcoma--serve to illustrate this point. One, the sarcomatoid carcinoma, is an epithelial malignancy in which the majority of the sarcoma-like spindle cells are believed to be variants of the epithelial cells. Nodular fasciitis, a self-limited and benign soft tissue lesion, is composed principally of myofibroblasts. Primarily an extramucosal lesion, it presents a pseudosarcomatous microscopic appearance. Fibrosarcomas represent the other end of the spindle cell lesion spectrum in that they are soft tissue malignancies of fibroblastic origin. Clinical, pathologic, and biologic implications of these lesions when they arise in the mucosae of the upper aerodigestive tracts of the head and neck are presented.

System, method and apparatus for improved electrical-to-optical transmitters disposed within printed circuit boards

Abstract: The present invention provides a system, method and apparatus for improved electrical-to-optical transmitters ( 100 ) disposed within printed circuit boards ( 104 ). The heat sink ( 110, 200 ) is a thermal conductive material disposed within a cavity ( 102 ) of the printed circuit board ( 104 ) and is thermally coupled to a bottom surface ( 112 ) of the electrical-to-optical transmitter ( 100 ). A portion of the thermal conductive material extends approximately to an outer surface ( 120, 122 or 124 ) of a layer ( 114, 116 or 118 ) of the printed circuit board ( 104 ). The printed circuit board may comprise a planarized signal communications system or an optoelectronic signal communications system. In addition, the present invention provides a method for fabricating the heat sink wherein the electrical-to-optical transmitter disposed within a cavity of the printed circuit board is fabricated. New methods for flexible waveguides and micro-mirror couplers are also provided.