Tratamiento percutáneo del síndrome de hipertensión externa rotuliana. Liberación del retináculo lateral con cuchillo de Smillie

El Síndrome de Hiperpresión Externa Rotuliana (SHER), es una causa de dolor de rodilla asociada a la luxación lateral, subluxación lateral y a la anormalidad del deslizamiento lateral sin subluxación, como patologías en las que la liberación del retináculo lateral puede ofrecerse como alternativa efectiva de tratamiento. Es conocido que existen tres vías con diferentes técnicas para la liberación del alerón rotuliano externo. Abierta, Artroscópica y Percutánea, siendo esta última la menos usada. En este estudio se realizaron 21 liberaciones del retináculo lateral, usando una técnica percutánea con cuhillo de Smillie, en 14 pacientes con diagnóstico de SHER, entre 1985 y 1996, de los cuales fueron 9 mujeres (64%) y 5 hombres (36%), con edades comprendidas entre los 15 y 30 años con un promedio de 21,5 años. Obtuvimos en 19 de las 21 rodillas resultados satisfactorios (buenos o muy buenos) para un 90,5% y en 2 rodillas (9,5%) resultados no satisfactorios (regulares o malos) con un seguimiento de 6 meses a 5 años. Concluimos que la liberación del retináculo lateral con cuchillo de Smillie, es una técnica que ofrece buenos resultados para el tratamiento del SHER.The Lateral Patellar Hiperpresion Syndrome (LPHS) is a common cause of pain at knee level. Many surgical approaches have been used, Open, Arthroscopical and Percutaneous, being this last the less frequently reported in the literature. In this study we report on 21 percutaneous liberation of lateral retinaculum using the Smillie meniscus knife on 14 patients with LPHS between 1985 and 1996. Nine were females (64%) and 5 males (36%), with an age ranging from 15 to 30 years with a mean age of 21.5 years. In" 19 of the 21 knees (90,5%) we obtained satisfactory results (good or very good) and 2 knees (95%) with unsatisfactory results fair or bad. The follow-up ranged from 6 months to 5 years. We conclude that the percutaneous release of lateral retinaculum with the Smillie knife offers good results in the treatment of LPHS

The X-ray afterglow of GRB980519

Over a total of 20 gamma-ray bursts localized with arcmin accuracies, GRB980519 represents the 13th detected by the BeppoSAX Wide Field Cameras. An X-ray TOO observation performed by the BeppoSAX Narrow Field Instruments, starting about 9.5 hours after the high energy event, revealed X-ray afterglow emission in the 0.1--10 keV energy range. The flux decay was particularly fast with a power-law index of ~ 1.8. This is the fastest decay so far measured. Signs of bursting activity are evident. The power-law spectral index of 2.8 (+0.6, -0.5) is quite soft but not unique among GRB afterglows.Comment: 2 pages; 3 EPS figures; requires aa.cls, psfig.sty; accepted for publication on A&AS (Proc. of ``Gamma-Ray Bursts in the Afterglow Era'', Rome 3-6 Nov. 1998.

A Virtual PEP for Web Optimization over a Satellite-Terrestrial Backhaul

The availability of network softwarization and virtualization technology in the field of telecommunications has opened the door to a radical review of the applications, protocols, and deployment models. In this evolving framework, old assumptions and constraints specific to satellite communications must be carefully re-assessed. To this aim, we revisit the role of the performance enhancing proxy (PEP), replaced by a chain of custom virtual network functions properly enabled to optimize common web traffic performance over a backhaul dynamically enabled with a supplementary satellite link. The resulting virtual PEP (vPEP) is compliant with the breakthrough virtualization and slicing paradigms and can fruitfully exploit the advanced features of the most recent IETF technologies such as QUIC and MPTCP

Broad band X-ray spectral properties of Gamma-ray bursts with BeppoSAX

In about one year, five gamma-ray bursts were simultaneously observed with the Wide Field Cameras and Gamma Ray Burst Monitor aboard the BeppoSAX satellite. From some of them X-ray afterglow emission has been clearly detected with the same satellite. In order to understand how GRB emission is related to the X-ray afterglow, we are performing a systematic study of the spectral properties of these events. We report here preliminary results of this study.Comment: 5 pages, 3 figures. To appear in the Proceedings of the 4th Huntsville Gamma-ray Burst Symposiu