515 research outputs found
Gestione del nervo facciale nel trattamento del carcinoma adenoidocistico della parotide
No full textdurante la chirurgia demolitiva parotidea è possibile dover procede alla resezione del nervo facciale o di uno dei suoi rami. La ricostruzione immediata con graft nervoso, se realizzabile, risulta la miglior scelta terapeutica. Se il moncone prossimale del nervo facciale non risultasse utilizzabile per l’innesto è possibile scegliere una fonte motoria alternativa come i nervi ipoglosso o masseterino il cui impulso determinerà la forza contrattile della muscolatura. Un cross face con il nervo facciale controlaterale conferirà invece lo stimolo motorio spontaneo (emozionale). Qualora la ricostruzione immediata non fosse possibile e la muscolatura mimica avesse perso la potenzialità contrattile sarà necessario procedere alla ricostruzione differita trasponendo un lembo muscolare locale o un lembo libero microvascolare
Contemporary role of pectoralis major regional flaps in head and neck surgery
No full textCountless disadvantages of the “old” pectoralis major have been listed while the amazing versatility of the free flap armamentarium gives the opportunity to suit the defect deriving from virtually every ablative head and neck surgery with a tailored reconstruction. Nevertheless, pectoralis major is still the “workhorse” for head and neck reconstruction in developing countries thanks to its ease of harvest, and minimal requirements in term of instrumentation. Furthermore, even in facilities with a high volume of reconstructions by free flaps, a certain number of pectoralis major flaps is still raised every year. The history, present role and current indications of the most widely head and neck reconstructive procedure ever has been reviewed
, \Xi and\Omega production in Pb-Pb collisions at 158 A
No full textLøvhøiden j , M. Lupt'ak g , V. Mack i , V. Manzari b , P. Martinengo e , M.A. Mazzoni n , F. Meddi n , A. Michalon q , M.E. Michalon-Mentzer q , P. Middelkamp e , M. Morando k , M.T. Muciaccia b , E. Nappi b , F. Navach b , P.I. Norman d , B. Osculati f , B. Pastirc'ak g , F. Pellegrini k , K. P'iska m , F. Posa b , E. Quercigh e , R.A. Ricci h , G. Romano o , G. Rosa o , L. Rossi f , H. Rotscheidt e , K. Safar'ik e , S. Saladino b , C. Salvo f , L. S'andor e;
Production of hyperons and anti-hyperons in heavy-ion collisions at SPS: Experiments at the CERN Omega spectrometer
No full text35.9> g , R.A. Loconsole b , G. Løvhøiden j , M. Lupt'ak g , I. M'acha n , V. Mack i , V. Manzari b , P. Martinengo e , M.A. Mazzoni o , F. Meddi o , A. Michalon r , M.E. Michalon-Mentzer r , P. Middelkamp e , M. Morando k , M.T. Muciaccia b , E. Nappi b , F. Navach b , K. Norman d , B. Osculati f , B. Pastirc'ak g , F. Pellegrini k , K. P'iska m , F. Posa b , E. Quercigh e , R.A. Ricci h , G. Romano p , G. Rosa p , L. Rossi f , H. Rotscheidt e , K. Safar'ik e , S. Saladino
WA97 results on strangeness production in lead-lead collisions at 158
No full texte , J.C. Lassalle e , V. Lenti b , Ph. Leruste l , J.A. Lien j , R. Lietava g , R.A. Loconsole b , L. Lopez e , G. Løvhøiden j , M. Luptak g , I. Macha n , V. Mack i , V. Manzari b , P. Martinengo e , M.A. Mazzoni o , F. Meddi o , A. Michalon r , M.E. Michalon-Mentzer r , P. Middelkamp e , M. Morando k , M.T. Muciaccia b , E. Nappi b , J.L. Narjoux l , F. Navach b , K. Norman d , B. Osculati f , B. Pastircak g , F. Pellegrini k , K. Pska m , F. Posa b , E. Querci
Superficial vs. Deep Venous System in DIEP Flaps: Lessons from 25 Years of CTA-Guided Planning
No full textBackground: Venous congestion is a major contributor to complications in DIEP flap breast reconstruction. Beyond superficial venous dominance, the presence or absence of anatomical connections between the superficial and deep venous systems may influence drainage physiology. This study investigates how preoperative CTA and targeted superdrainage impact outcomes over a 25-year period. Patients and Methods: A retrospective analysis was conducted on 208 DIEP flaps performed from 2000 to 2024 at a single center. From 2006, computed tomographic angiography (CTA) was routinely used to evaluate venous anatomy, focusing on the presence, trajectory, and connection of the superficial inferior epigastric vein (SIEV) with the deep system. Superdrainage was performed when superficial venous dominance was evident or drainage was judged insufficient intraoperatively. Primary outcomes included venous congestion, partial necrosis, and reoperations; secondary outcomes included hospital stay and safety of superdrainage. Results: Venous complications decreased significantly after CTA implementation (37.5% vs. 8.0%; p < 0.001). Superdrainage was performed in 40.9% of post-CTA cases, with 90% preoperatively planned based on CTA findings. No complications were associated with second venous anastomosis. Flap outcomes correlated not with perforator number or flap size but with venous drainage physiology. Mean hospital stay was shorter post-CTA (6 vs. 9 days; p < 0.001). Conclusions: Evaluating the anatomical connection between superficial and deep venous systems via CTA enhances venous planning and allows for safer, physiology-driven decisions. In the absence of such connections, intraoperative evaluation remains essential. Drainage physiology—rather than anatomical metrics alone—should guide surgical strategy in DIEP flap reconstruction
Designing a Linear Silicon Drift Detector
No full textThe design and 2D simulation results of a Silicon Drift Chamber with a rectangular configuration are presented, The proposed structure is intended to allow a test of the technology used in the production of the device and serve as a basis to verify different solutions in the design of drift detectors
Assembly procedure of the module (half-stave) of the ALICE Silicon Pixel Detector
No full textThe Silicon Pixel Detector (SPD) forms the two innermost layers of the ALICE Inner Tracking System (ITS). The detector includes 1200 readout ASICs, each containing 8192 pixel cells, bump-bonded to Si sensor elements. The thickness of the readout chip and the sensor element is 150mum and 200mum, respectively. Low-mass solutions are implemented for the bus and the mechanical support. In this contribution, we describe the basic module (half-stave) of the two SPD layers and we give an overview of its assembly procedure
Search for new SS states in the K- induced K+K- system
No full textResults from the first PWA of the K+K- system produced by incident K-, are presented in the mass range from the threshold to 1.70 GeV. In the P and D waves only the φ and f′ mesons are observed and their production mechanism studied. A broad S wave peaking at 1.4 GeV is observed but the lack of information about its phase makes the search for new 0++ mesons inconclusive. © 1983
STUDY OF THE CENTRALLY PRODUCED OMEGA-RHO(0) AND OMEGA-OMEGA SYSTEMS IN PP INTERACTIONS AT 300 GEV/C
No full textWe have performed a search for vector-vector final states centrally produced in proton proton interactions at 300 GeV/c using the CERN OMEGA spectrometer. Evidence is found for omegarho0 production in the reaction pp-->p(f)(2pi+2pi-pi0)p(s) and for omegaomega production in the reaction pp-->p(f)(2pi+2pi-2pi0)p(s). However no evidence is found for omegaphi production in the reaction pp-->p(f)(K+K-pi+pi-pi0)p(s)
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