California State University, Long Beach

About: California State University, Long Beach is a education organization based out in Long Beach, California, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 10036 authors who have published 13933 publications receiving 377394 citations. The organization is also known as: Cal State Long Beach & Long Beach State.

Lubeck spinal catheter needle

Abstract: A needle hereafter referred to as a metal cannula is of thin-walled construction and designed with a solid noncutting pencil point possessing a tip with an elliptical side port located not more than 1 (one) cannula Outer Diameter (O.D.) length from the tip and via a hollow internal channel the axial length of the cannula is capable of guiding an inserted catheter through the cannula for projection laterally out of the cannula for subsequent indwelling placement of the introduced catheter upon removal of the cannula. The sideport is placed on the angled surface of the developing point so that it coincides with the angle of the pencil point. The elliptical sideport has a machined and polished rounded internal edge intersecting with the external surface. The construction of the cannula combining a large diameter with a pencil point and the location of an opening at the tip permits safe introduction of a spinal catheter into the subarachnoid space with minimum damage to tissues or membranes by either the cannula or a catheter exiting the sideport. The cannula is fitted with an obturator which coincides with the shape of the internal lumen of the cannula where the obturator tip curves upward to occlude the opening of the cannula sideport. The cannula of the present invention has application to subarachnoid and epidural regional anesthesia and pain management procedures. The present invention is designed preferably as a large gauge needle (17-21 gauge) so that it will accept insertion of a large flexible catheter (20 to 22 gauge in diameter) for indwelling placement.

Relationships among Acculturation, Sociodemographic Characteristics and Social Supports in Mexican American Adults

Abstract: The relationship of acculturation and sociodemographic characteristics to social supports was studied in a representative sample of adult Mexican Americans. The relationship between network charact...

On the distribution of wildfire sizes

Abstract: A variety of models for the wildfire size distribution are examined using data on Los Angeles County wildfires greater than 100 acres between 1950 and 2000. In addition to graphs and likelihood criteria, Kolmogorov–Smirnoff and Cramer–von Mises statistics are used to compare the models. The tapered Pareto distribution appears to fit the data quite well and offers some advantages over the untapered Pareto distribution, while alternatives including the lognormal, half-normal, exponential and extremal distributions fit poorly. The size distribution appears to be quite stable over the examination period, though inspection of the transformed wildfire sizes for the tapered Pareto reveals some limited trend in the residuals, indicating a very slight gradual decrease in the average fire size in Los Angeles County over these 50 years. Copyright © 2003 John Wiley & Sons, Ltd.

Conformal Radiation Therapy for Pediatric Ependymoma, Chemotherapy for Incompletely Resected Ependymoma, and Observation for Completely Resected, Supratentorial Ependymoma.

Abstract: PURPOSEThe Children’s Oncology Group trial ACNS0121 estimated event-free survival (EFS) and overall survival for children with intracranial ependymoma treated with surgery, radiation therapy, and—s...