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- 저자 : Di Bartolomeo, Maria (검색결과 4 건)
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Luca Di Marco,Antonio Pantaleo,Alessandro Leone,Giacomo Murana,Roberto Di Bartolomeo,Davide Pacini 대한흉부외과학회 2017 Journal of Chest Surgery (J Chest Surg) Vol.50 No.1
Complex lesions of the thoracic aorta are traditionally treated in 2 surgical steps with the elephant trunk technique. A relatively new approach is the frozen elephant trunk (FET) technique, which potentially allows combined lesions of the thoracic aorta to be treated in a 1-stage procedure combining endovascular treatment with conventional surgery using a hybrid prosthesis. These are very complex and time-consuming operations, and good results can be obtained only if appropriate strategies for myocardial, cerebral, and visceral protection are adopted. However, the FET technique is associated with a non-negligible incidence of spinal cord injury, due to the extensive coverage of the descending aorta with the excessive sacrifice of intercostal arteries. The indications for the FET technique include chronic thoracic aortic dissection, acute or chronic type B dissection when endovascular treatment is contraindicated, chronic aneurysm of the thoracic aorta, and chronic aneurysm of the distal arch. The FET technique is also indicated in acute type A a ortic dissection, especially when the tear is localized in the aortic arch; in cases of distal malperfusion; and in young patients. In light of the great interest in the FET technique, the Vascular Domain of the European Association for cardio-thoracic Surgery published a position paper reporting the current knowledge and the state of the art of the FET technique. Herein, we describe the surgical techniques involved in the FET technique and we report our experience with the FET technique for the treatment of complex aortic disease of the thoracic aorta.
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Gadolinium-doped ceria nanopowders synthesized by urea-based homogeneous co-precipitation (UBHP)
Accardo, G.,Spiridigliozzi, L.,Cioffi, R.,Ferone, C.,Di Bartolomeo, E.,Yoon, Sung Pil,Dell’Agli, G. Elsevier 2017 Materials chemistry and physics Vol.187 No.-
<P><B>Abstract</B></P> <P>Gadolinium (10%)-doped ceria was successfully synthesized by using an urea-based co-precipitation method (UBHP). A single fluorite phase was obtained after a low temperature (400 °C) calcination treatment. The resulting powders showed grains of nanometric size with some agglomerations and an overall good sinterability. Pellets were sintered at 1300 and 1500 °C for 3 h. The ionic conductivity was measured by electrochemical impedance spectroscopy measurements and a correlation between electrical properties and microstructure was revealed. The promising conductivity values showed that the synthesized powders are suitable for intermediate temperature solid oxide fuel cells (IT-SOFCs) applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Urea-based homogeneous co-precipitation is applied to synthesize nanocrystalline GDC. </LI> <LI> Dense GDC samples at different sintering temperatures were characterized. </LI> <LI> SEM and TEM revealed a well define microstructure and controlled composition. </LI> <LI> Correlation between electrochemical properties by EIS and microstructure was discussed. </LI> <LI> UBHP method can be used to prepare high performance GDC electrolytes. </LI> </UL> </P>
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Bang, Yung-Jue,Cho, Jae Yong,Kim, Yeul Hong,Kim, Jin Won,Di Bartolomeo, Maria,Ajani, Jaffer A.,Yamaguchi, Kensei,Balogh, Agnes,Sanchez, Teresa,Moehler, Markus American Association for Cancer Research 2017 Clinical Cancer Research Vol.23 No.19
<P><B>Purpose:</B> Ipilimumab, a monoclonal antibody that blocks cytotoxic T-lymphocyte–associated protein-4 interactions, enhances T-cell activation and promotes tumor immunity. This phase II study evaluated the safety and efficacy of ipilimumab monotherapy versus best supportive care (BSC) among patients with advanced/metastatic gastric or gastroesophageal junction cancer who achieved at least stable disease with first-line chemotherapy.</P><P><B>Experimental Design:</B> Eligible patients were randomized to ipilimumab 10 mg/kg every 3 weeks for four doses, then 10 mg/kg every 12 weeks for up to 3 years, or BSC, which could include continuation of fluoropyrimidine until progression or toxicity. The primary endpoint was immune-related progression-free survival (irPFS); secondary endpoints included PFS by modified World Health Organization criteria and overall survival (OS).</P><P><B>Results:</B> Of 143 patients screened, 57 were randomized to each arm. irPFS with ipilimumab versus BSC was not improved [2.92 months, 95% confidence interval (CI), 1.61–5.16 vs. 4.90 months, 95% CI, 3.45–6.54, HR = 1.44; 80% CI, 1.09–1.91; <I>P</I> = 0.097], resulting in study cessation. At study closeout, which occurred 8 months after the interim analysis, the median OS durations were 12.7 months (95% CI, 10.5–18.9) and 12.1 months (95% CI, 9.3–not estimable), respectively. Grade 3/4 treatment-related adverse events occurred in 23% of ipilimumab-treated patients, in whom diarrhea (9%) and fatigue (5%) were most frequent, and in 9% of active BSC-treated patients.</P><P><B>Conclusions:</B> Although ipilimumab at 10 mg/kg was manageable, it did not improve irPFS versus BSC. However, comparable median OS of approximately 1 year and a favorable safety profile support the investigation of ipilimumab in combination with other therapies for advanced gastric cancer. <I>Clin Cancer Res; 23(19); 5671–8. ©2017 AACR</I>.</P>
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Transcatheter Mitral Valve Implantation in Open Heart Surgery: An Off-Label Technique
Jacopo Alfonsi,Giacomo Murana,Anna Corsini,Carlo Savini,Roberto Di Bartolomeo,Davide Pacini 대한흉부외과학회 2017 Journal of Chest Surgery (J Chest Surg) Vol.50 No.6
Extensive mitral annulus calcifications are considered a contraindication for valve surgery. We describe the case of a 76-year-old female with severe mitral and aortic stenosis associated with extensive calcifications of the heart. The patient underwent an open mitroaortic valve replacement using transcatheter aortic valve implantation with an Edwards SAPIEN XT valve (Edwards Lifesciences Corp., Irvine, CA, USA) in the mitral position. T he a ortic valve was replaced u sing a s tentless v alve p rosthesis (LivaNova S OLO; L ivaNova PLC, London, UK). Postoperative echocardiography showed that the prosthetic valve was in the correct position and there were no paravalvular leaks. A bailout open transcatheter valve implantation can be considered a safe and effective option in selected cases with an extensively calcified mitral valve.
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