102,008 research outputs found
Dispositivi risonanti per migliorare la qualità del servizio nelle reti di distribuzione passive e attive
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PERCUTANEOUS US (ULTRA SOUND) GUIDED FINE NEEDLE ASPIRATION (FNA) OF ENDOTHORACIC NEOPLASM
No full textIntroduction: Ultrasound (US)-guided fine needle aspiration (FNA) of percutaneous, transparietal endothoracic lesions, is a useful method in the diagnostic process for anatomopathological characterization. This sampling is a minimally invasive procedure, with a low complication rate and can be performed under loco-regional anesthesia
Material and methods: We retrospectively studied (2009 to 2019) the utility of US guided transthoracic FNA in the diagnosis of suspected endothoracic lesions on 54 patients (34 men and 20 women), aged between 44 and 79 years, with pleural, pulmonary or mediastinal neoplasm viewable with an US examination.
Results: The definitive diagnosis of malignant or benign neoplastic disease was obtained by the pathological examination of the material obtained through the US-guided FNA or by other procedures performed subsequently: biopsies/surgery and clinical information, associated with clinical follow-up. The accuracy of the US guided FNA was 94.4% (51/54) with a sensitivity of 93.8% (93.8) and specificity of 100% (5/5); multiple FNA were performed in 24% of cases (13/54).
Conclusions: US-guided FNA is a procedure that can be performed in one day surgery and allows a significant reduction in healthcare costs and has a particularly high diagnostic accuracy with good patient compliance
La colecistectomia laparoscopica nel paziente uremico
No full textNel presente studio vengono valutati i vantaggi della colecistectomia
videolaparoscopica (VLC) eseguita in due pazienti uremici affetti da calcolosi
della colecisti.
Dal gennaio al luglio 2004, di 27 pazienti affetti da calcolosi della colecisti 15 sono stati sottoposti a VLC, delle quali 4 sono convertite. Due dei
pazienti sottoposti a VLC erano in trattamento dialitico: una donna di 42
anni, sintomatica, affetta anche da iperparatiroidismo primitivo e da iperaldosteronismo primitivo, e un uomo di 55 anni, asintomatico, in lista per il
trapianto renale. Non sono state osservate complicanze maggiori e minori ed
entrambi i pazienti sono stati dimessi in IV giornata postoperatoria.
Anche nei pazienti uremici la VLC deve essere il gold standard per il
trattamento della calcolosi della colecisti sintomatica o non
ULTRASOUND (US) GUIDED DIAGNOSTIC PROCEDURES AND MALIGNANT PLEURAL EFFUSIONS
No full textIntroduction: Malignant pleural effusion (PE) is a rather frequent complication of several intrathoracic and extrathoracic tumors and has an incidence of about 660 patients per million inhabitants per year.
Materials and methods: We retrospectively studied (2000 to 2018) the utility of US guided percutaneous puncture (PP) of PE, in the diagnosis/therapy of 121 patients (67 women and 54 men) with PE and suspected malignant neoplasm, mean age 52 years (39-78 years),
Results: The diagnostic accuracy of the US guided PP fluid examination, (diagnoses of malignant PE), was 91.7% (111/121), with sensitivity of 89.5% (86/96) and specificity of 100%. (25/25). 10 patients did not have confirmation of malignant PE with US guided PP; the malignancy diagnosis was obtained by biopsy with other surgical procedure.
Conclusions: The use of chest US has allowed us to reduce procedure time, hospital stay, with a significant reduction in healthcare costs, and to obtain a particularly high diagnostic accuracy with good patient compliance. We did not observe major complications during US guided PP; minor complications were found in 16.9% (14 cases) with the presence of mild chest pain
Performances of the Fault Decoupling Device when unbalanced and multiple faults occur on distribution systems.
No full textA New Solution to Mitigate Voltage Dips on Electrical Distribution Systems: the Fault Decoupling Device.
No full textAn overview of a novel LC resonant device able to improve Power Quality in active and passive distribution networks
No full textNowadays power distribution systems are under a rapid evolution. The widespread penetration of distributed generation is bringing about new operating conflicts, which are adding to traditional power quality issues. The paper aims to analyse the performance of a new LC device able to improve power quality in electrical distribution systems, even in presence of distributed generation units. The different possible applications of the device are shown and the performances are proved by means of computer simulation. The first experimental results are also presented
Applications of the Fault Decoupling Device to Improve the Operation of LV Distribution Networks
No full textThe aim of this paper is to present the operating principle of a new resonant device, called the fault decoupling device (FDD), able to improve power quality in electrical distribution systems. In low-voltage networks, this device can be employed in order to mitigate voltage dips due to faults or large induction motor startup. Moreover, in the presence of distributed-generation (DG) units, the FDD allows one to obtain various benefits such as a reduction of the fault current in each node of the network and an increase in the voltage at the DG unit node. In order to show the performances of the FDD, analytical studies and computer simulations were carried out which took into account various working operation conditions. Finally, the prototype of the FDD as well as the preliminary experimental results are presented
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