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On the convergence of a semi-Lagrangian scheme for the BGK model of the Boltzmann equation
Giovanni Russo,Piero Santagati,Seok-Bae Yun 한국산업응용수학회 2009 한국산업응용수학회 학술대회 논문집 Vol.2009 No.5
Recently, the first and second authors proposed a semi-Lagrangian scheme for the BGK model of the Boltzmann equation. In this talk, we show that the approximate distribution function of the scheme converges to the smooth solution of the BGK model. We also derive an explicit convergence estimate.
Russo Luca,Avesani Giacomo,Gui Benedetta,Trombadori Charlotte Marguerite Lucille,Salutari Vanda,Perri Maria Teresa,Di Paola Valerio,Rodolfino Elena,Scambia Giovanni,Manfredi Riccardo 대한영상의학회 2021 Korean Journal of Radiology Vol.22 No.8
Immunotherapy is an effective treatment option for gynecological malignancies. Radiologists dealing with gynecological patients undergoing treatment with immune checkpoint inhibitors should be aware of unconventional immune-related imaging features for the evaluation of tumor response and immune-related adverse events. In this paper, immune checkpoint inhibitors used for gynecological malignancies and their mechanisms of action are briefly presented. In the second part, patterns of pseudoprogression are illustrated, and different forms of immune-related adverse events are discussed.
Andrea Cocci,Giovanni E. Cacciamani,Giorgio Ivan Russo,Maria Angela Cerruto,Martina Milanesi,Luis G. Medina,Sebastiano Cimino,Walter Artibani,Giuseppe Morgia,Marco Carini,Vincenzo Li Marzi 대한배뇨장애요실금학회 2017 International Neurourology Journal Vol.21 No.4
Purpose: To evaluate the impact of preoperative patient characteristics and flow rate on failure, early postoperative complications, and voiding in patients who underwent transvaginal tension-free vaginal tape-obturator (TVT-O) treatment for uncomplicated stress urinary incontinence (SUI). Methods: We retrospectively reviewed patients who underwent TVT-O for SUI at 3 Italian centres. The exclusion criteria were predominant voiding and storage symptoms suggestive of detrusor overactivity, the presence of grade >1 urogenital prolapse, previous pelvic radiotherapy or other clinical contraindications for surgical procedures, neurogenic bladder dysfunction, and collagen diseases. Multivariate logistic regression models were constructed to identify predictors of early voiding dysfunction after TVT-O. Results: A total of 219 patients underwent TVT-O between January 2010 and December 2015. All patients received follow-up at 3, 6, and 12 months, and underwent a stress test, uroflowmetry, and bladder ultrasound to evaluate the postvoid residual volume. They also responded to the Urogenital Distress Inventory (UDI-6) questionnaire. The rates of persistent incontinence after TVT-O, postoperative complications, and satisfaction were 16.4% (36 of 219), 24.2% (53 of 219), and 86.3% (189 of 219), respectively. Nineteen patients (9.5%) experienced early voiding dysfunction. Based on an analysis of baseline characteristics, we determined that a cutoff value of 9.0 on the UDI-6 predicted postoperative SUI with 62% specificity, 72% sensitivity, and 66% accuracy. In the multivariate logistic regression analysis, a preoperative UDI-6≥9.0 was an independent predictor of postoperative SUI. The predictors of complications were menopause (P = 0.04) and the preoperative UDI-6 score (P = 0.01). Conclusions: Menopause and UDI-6 scores could be prognostic factors for persistent SUI after TVT-O. Well-designed prospective studies with a suitable number of patients are needed to corroborate our findings.
The Prognostic Significance of Patient-Prosthesis Mismatch after Aortic Valve Replacement
Paolo Nardi,Marco Russo,Guglielmo Saitto,Giovanni Ruvolo 대한흉부외과학회 2018 Journal of Chest Surgery (J Chest Surg) Vol.51 No.3
Patient-prosthesis mismatch (PPM) is a controversial issue in current clinical practice. PPM has been reported to have a negative impact on patients’ prognosis after aortic valve replacement in several studies, showing increased all-cause and cardiac mortality. Moreover, a close relationship has recently been described between PPM and structural valve deterioration in biological prostheses. In patients at risk for PPM, several issues should be considered, and in the current era of cardiac surgery, preoperative planning should consider the different types of valves available and the various surgical techniques that can be used to prevent PPM. The present paper analyses the state of the art of the PPM issue.
Andrea Cocci,Fabrizio Di Maida,Giorgio Ivan Russo,Marina di Mauro,Gianmartin Cito,Marco Falcone,Andrea Minervini,Giovanni Cacciamani,Riccardo Campi,Andrea Mari,Francesco Sessa,Nicola Mondaini 대한남성과학회 2020 The World Journal of Men's Health Vol.38 No.1
Purpose: The aim of this study was to evaluate the efficacy of collagenase Clostridium histolyticum (CCH) in patients with Peyronie’s disease (PD) suffering from atypical deformities. Materials and Methods: We retrospectively collected data of patients with atypical penile curvature (PC) secondary to PD. All patients underwent a modified treatment protocol, consisting of 3 intralesional injections of 0.9 mg of CCH performed at 4-week intervals at the point of maximum PC. Patients were instructed to follow a strict routine, involving daily modeling of erect penis and stretching at the urinary toilette time, two minutes each. Success was defined as a decrease in PC of ≥20° from baseline. Results: Sixty-five patients were included in the analysis. Median age was 59.0 years (interquartile range [IQR], 53.0 to 63.0 years), median curvature 40.0° (IQR, 30.0° to 45.0°) median duration of the disease 12.0 years (IQR, 6.5 to 24.0 years). Fiftythree patients (81.54%) had ventral PC, 7 (10.77%) hourglass PC, and 5 (7.69%) shortening PC. Median changes of PC were -20.0 (IQR, -20.0 to -10.0; p<0.01) in ventral PC, -20.0 (IQR, -20.0 to 0; p<0.01) in hourglass and -15.0 (IQR, -15.0 to -15.0; p<0.01) in shortening PC. At Kruscal–Wallis test, significant differences between groups were not found. The rate of PC success was 56.60% (30/53) in ventral PC, 57.14% (4/7) in hourglass and 20.00% (1/5) in shortening PC (p=0.29). Treatment success was not influenced by characteristics of curvature (odds ratio=0.66; p=0.20). Conclusions: CCH intralesional injections could represent an effective therapeutic option for the conservative management of patients with atypical PC.