Your browser doesn't support javascript.
Mostrar: 20 | 50 | 100
Resultados 1 - 5 de 5
Filtrar
Mais filtros










Base de dados
Tipo de estudo
Intervalo de ano de publicação
1.
Medicine (Baltimore) ; 98(51): e18451, 2019 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-31861019

RESUMO

To clarify the priority of lymph node dissection (LND) in advanced Siewert type II and III AEG, in which the center of the tumor is located below the esophagogastric junction (EGJ).Data in 395 patients with advanced Siewert type II or III AEG was analyzed retrospectively. The index of estimated benefit from LND (IEBLD) was used to evaluate the efficacy of LND for each nodal station.The mean number of dissected LNs did not differ significantly between patients with type II and III AEG, nor did the mean number of retrieved LNs at each station significantly differ between the 2 groups. According to the IEBLD, the dissection of parahiatal LNs (No.19 and 20) and LNs along the distal portion of the stomach (No.5, 6, and 12a) seemed unlikely to be beneficial, whereas the dissection of Nos.1-3, 7, 9 and 11p yielded high therapeutic benefit (IEBLD>3.0) in both groups. The IEBLDs of No.4d, 8a, and 10 were much higher in type III than in type II AEG cases. No.10 LND may improve survival for type III AEG cases (IEBLD = 2.9), especially for subgroups with primary tumors invading the serosa layer, undifferentiated cancers, macroscopic type 3-4 tumors and tumors ≥50 mm in size (all IEBLDs > 4.0).For advanced AEG located below the EGJ, the dissection of paracardial LNs, lesser curvature LNs, and LNs around the celiac axis would promote higher survival benefits regardless of the Siewert subtype. Patients with type III AEG, especially those with serosa-invasive tumors, undifferentiated tumors, macroscopic type 3-4 tumors and tumors ≥50 mm in size may obtain relatively higher survival benefits from No. 10 lymphadenectomy.


Assuntos
Adenocarcinoma/cirurgia , Junção Esofagogástrica , Excisão de Linfonodo , Neoplasias Gástricas/cirurgia , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Melhoria de Qualidade , Estudos Retrospectivos
2.
ACS Appl Mater Interfaces ; 10(15): 12666-12677, 2018 Apr 18.
Artigo em Inglês | MEDLINE | ID: mdl-29569902

RESUMO

Owing to high specific capacity of ∼250 mA h g-1, lithium-rich layered oxide cathode materials (Li1+ xNi yCo zMn(3- x-2 y-3 z)/4O2) have been considered as one of the most promising candidates for the next-generation cathode materials of lithium ion batteries. However, the commercialization of this kind of cathode materials seriously restricted by voltage decay upon cycling though Li-rich materials with high cobalt content have been widely studied and show good capacity. This research successfully suppresses voltage decay upon cycling while maintaining high specific capacity with low Co/Ni ratio in Li-rich cathode materials. Online continuous flow differential electrochemical mass spectrometry (OEMS) and in situ X-ray diffraction (XRD) techniques have been applied to investigate the structure transformation of Li-rich layered oxide materials during charge-discharge process. The results of OEMS revealed that low Co/Ni ratio lithium-rich layered oxide cathode materials released no lattice oxygen at the first charge process, which will lead to the suppression of the voltage decay upon cycling. The in situ XRD results displayed the structure transition of lithium-rich layered oxide cathode materials during the charge-discharge process. The Li1.13Ni0.275Mn0.580O2 cathode material exhibited a high initial medium discharge voltage of 3.710 and a 3.586 V medium discharge voltage with the lower voltage decay of 0.124 V after 100 cycles.

3.
Zhonghua Wei Chang Wai Ke Za Zhi ; 15(5): 502-4, 2012 May.
Artigo em Chinês | MEDLINE | ID: mdl-22648848

RESUMO

OBJECTIVE: To evaluate the outcomes of combined organ resection for T4b gastric cancer, and determine the operative indication and prognostic factors. METHODS: Clinical data of 96 cases with T4bN0-3bM0 gastric cancer treated with combined organ resection in Tianjin Cancer Hospital from 2001 to 2005 were analyzed retrospectively. RESULTS: Twelve patients developed postoperative complications, including pancreatic fistula (n=4), abdominal infection(n=5), pulmonary infection(n=3), all of which were managed with conservative treatment. There were no perioperative deaths. All the patients had postoperative follow up with a median of 73 months. The 1-, 3-, 5-year overall survival rates were 70.5%, 42.1%, and 23.5%, respectively. Univariate analysis showed that Borrmann type, histologic type, lymph node staging, and pancreatic invasion were associated with the survival in patients with T4b gastric cancer(both P<0.05). Multivariable analysis showed that lymph node staging and histologic type were independent prognostic factors(all P<0.05). CONCLUSION: For well differentiated gastric cancer with lymph node staging of pN0 or pN1, combined organ resection may offer survival benefit.


Assuntos
Neoplasias Gástricas/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Seguimentos , Gastrectomia , Humanos , Excisão de Linfonodo , Masculino , Pessoa de Meia-Idade , Prognóstico , Estudos Retrospectivos , Resultado do Tratamento
5.
Hepatobiliary Pancreat Dis Int ; 3(4): 612-5, 2004 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-15567757

RESUMO

BACKGROUND: The incidence of carcinoma of the pancreas is increasing in the world. Pancreatic carcinoma is characterized by early local extension to contiguous structures and metastases to regional lymph nodes and the liver. This study was conducted to increase the rate of pancreatoduodenectomy combined with vascular reconstruction. METHODS: Pancreatoduodenectomy with vascular reconstruction was performed for 79 patients at a number of hospitals in Fujian Province, Zhejiang Province, Shanghai and Xinjiang Uyghur Autonomous Region from April 1994 to December 2003. One of these patients also underwent right hemicolectomy; but all received through superior mesenteric vein (SMV)-portal vein (PV) reconstruction. The reconstructions of the superior mesenteric artery (SMA) and hepatic artery (HA) were performed in 4 patients, and reconstructions of the SMA or HA were carried out in 7 and 4 patients respectively. Partial reconstruction of the inferior vena cava (ICV) was done in 2 patients when the tumor was adhering to the wall of the inferior caval vein. RESULTS: Four patients died during the peri-operative period, with a mortality rate of 5%. No complications such as biliary or pancreatic fistulae or artificial blood vessel infection were noted. Histological examination showed one patient with neuroendocrine cancer and the other 78 patients with adenocarcinoma of the pancreatic head. Resected endothelia and vascular margins proved to be microscopically tumor-free. Follow-up for 3 months to 10 years for all except two patients showed 7 of the 9 patients who had undergone resection and reconstruction of the SMA and HA died 7 months or 4 years after operation and 37 survived for over 3 years and 12 for more than 5 years. The rest are still under follow-up. CONCLUSION: Pancreatoduodenectomy with vascular reconstruction for carefully selected patients with carcinoma of the pancreatic head has proved to be a safe and reliable treatment, capable of raising the rates of tumor resection and survival.


Assuntos
Adenocarcinoma/cirurgia , Carcinoma Neuroendócrino/cirurgia , Neoplasias Pancreáticas/cirurgia , Pancreaticoduodenectomia , Procedimentos Cirúrgicos Vasculares , Adenocarcinoma/mortalidade , Idoso , Idoso de 80 Anos ou mais , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias Pancreáticas/mortalidade , Análise de Sobrevida
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA