MAURICIO KAZUYOSHI MINATA
Projetos de Pesquisa
Unidades Organizacionais
Instituto Central, Hospital das Clínicas, Faculdade de Medicina - Médico
9 resultados
Resultados de Busca
Agora exibindo 1 - 9 de 9
- Suction versus slow-pull for endoscopic ultrasound-guided fine-needle aspiration of pancreatic tumors: a prospective randomized trial(2020) CHENG, Spencer; BRUNALDI, Vitor O.; MINATA, Mauricio K.; CHACON, Danielle A.; SILVEIRA, Eduardo B.; MOURA, Diogo T. H. de; SANTOS, Marcos E. L. Dos; MATUGUMA, Sergio E.; CHAVES, Dalton M.; FRANCA, Raony F.; JACOMO, Alfredo L.; ARTIFON, Everson L. A.Background: Suction (S) is commonly used to improve cell acquisition during endoscopic ultrasoundguided fine-needle aspiration (EUS-FNA). Slow-pull (SP) sampling is another technique that might procure good quality specimens with less bloodiness. We aimed to determine if SP improves the diagnostic yield of EUS-FNA of pancreatic masses. Methods: Patients with pancreatic solid masses were randomized to four needle passes with both techniques in an alternate fashion. Sensitivity, specificity, positive, and negative predictive values were calculated. Cellularity and bloodiness of cytological samples were assessed and compared according to the technique. Results: Sensitivity, specificity, and accuracy of suction vs. SP were 95.2% vs. 92.3%; 100% vs. 100; 95.7% vs. 93%, respectively. As to the association of methods, they were 95.6, 100 and 96%, respectively. Positive predictive values for S and SP were 100%. There was no difference in diagnostic yield between S and SP (p = 0.344). Cellularity of samples obtained with SP and Suction were equivalent in both smear evaluation (p = 0.119) and cell-block (0.980). Bloodiness of SP and suction techniques were similar as well. Conclusions: S and SP techniques provide equivalent sensitivity, specificity, and accuracy. Association of methods seems to improve diagnostic yield. Suction does not increase the bloodiness of samples compared to slow-pull.
- Efficacy and Safety of Stents in the Treatment of Fistula After Bariatric Surgery: a Systematic Review and Meta-analysis(2018) OKAZAKI, Ossamu; BERNARDO, Wanderley M.; BRUNALDI, Vitor O.; CLEMENTE JUNIOR, Cesar C. de; MINATA, Mauricio K.; MOURA, Diogo T. H. de; SOUZA, Thiago F. de; CAMPOS, Josemberg Marins; SANTO, Marco Aurelio; MOURA, Eduardo G. H. deFistula development is a serious complication after bariatric surgery. We performed a systematic review and meta-analysis to assess the efficacy of fistula closure and complications associated with endoscopic stent treatment of fistulas, developed after bariatric surgeries, particularly Roux-en-Y gastric bypass (RYGB) and gastric sleeve (GS). Studies involving patients with fistula after RYGB or GS and those who received stent treatment only were selected. The analyzed outcomes were overall success rate of fistula closure, mean number of stents per patient, mean stent dwelling time, and procedure-associated complications. Current evidence from identified studies demonstrates that, in selected patients, endoscopic stent treatment of fistulas after GS or RYGB can be safe and effective.
- Laparoscopic Greater Curvature Plication and Laparoscopic Sleeve Gastrectomy Treatments for Obesity: Systematic Review and Meta-Analysis of Short- and Mid-Term Results(2018) BARRICHELLO, Sergio; MINATA, Mauricio Kazuyoshi; GORDEJUELA, Amador Garcia Ruiz de; BERNARDO, Wanderley Marques; SOUZA, Thiago Ferreira de; GALVO NETO, Manoel; MOURA, Diogo Turiani Hourneaux de; SANTO, Marco Aurelio; MOURA, Eduardo Guimares Hourneaux deLaparoscopic greater curvature plication (LGP) has recently emerged as a new bariatric procedure. This surgery provides gastric restriction without resection, which could potentially provide a lower risk alternative, with fewer complications. The real benefit of this technique in the short and long term is unknown. This systematic review aims to compare laparoscopic gastric plication and laparoscopic sleeve gastrectomy for obesity treatment. Clinical trials were identified in MEDLINE, Embase, Cochrane, LILACS, BVS, SCOPUS, and CINAHL databases. Comparison of LGP and laparoscopic sleeve gastrectomy (SG) included hospital stay, operative time, loss of hunger feeling, body mass index loss (BMIL), percentage of excess weight loss (%EWL), complications, symptoms in the postoperative period, and comorbidity remission or improvement. This systematic review search included 17,423 records. Eight studies were selected for meta-analysis. There is no difference in operative time, hospital stay, and complications. Patients in the SG group had improved loss of hunger feeling. BMIL was better in the SG group at 12 and 24 months [mean difference (MD) - 2.19, 95% confidence interval (CI) - 3.10 to - 1.28, and MD - 4.59, 95% CI - 5.55 to - 3.63, respectively]. SG showed improved %EWL compared with gastric plication in 3, 6, 12, and 24 months. However, no difference was found in %EWL long-term results (24 and 36 months). Patients who underwent LGP had more sialorrhea. SG showed better results in diabetes remission. SG showed improved weight loss when compared with LGP, with better satiety, fewer symptoms in the postoperative period, and improved diabetes remission.
- Massive bleeding after plastic stent removal during ERCP: what's next?(2017) LERA, Marcos Eduardo; MINATA, Mauricio Kazuyoshi; DUARTE, Ralph Braga; MATUGUMA, Sergio Eiji; SAKAI, Paulo; ANDRAUS, Wellington; MOURA, Eduardo Guimaraes Hourneaux de
- Self-expandable metal stent in lumen-apposing metal stent (the SEMS-in-LAMS procedure): a simple salvage procedure after LAMS misplacement(2019) LERA, Marcos E.; MATUGUMA, Sergio E.; MADRUGA-NETO, Antonio C.; BRUNALDI, Vitor O.; MINATA, Mauricio K.; GUEDES, Hugo G.; MOURA, Eduardo G. H. de
- Endoscopic approach to complex gastric tube stricture after laparoscopic sleeve gastroplasty: a case report(2021) FUNARI, Mateus Pereira; MIRANDA NETO, Antonio Afonso; SAGAE, Vitor Massaro Takamatsu; SOUZA, Thiago Ferreira de; MINATA, Mauricio Kazuyoshi; CHENG, Spencer; MOURA, Eduardo Guimaraes Hourneaux de
- Endoscopic-ultrasound evaluation and fine needle aspiration with a linear echoendoscope in the cecum: it is possible(2019) CHENG, Spencer; BRUNALDI, Vitor Ottoboni; SILVA, Gustavo Luis Rodela; FURUYA, Carlos Kiyoshi; MINATA, Mauricio Kazuyoshi; MATUGUMA, Sergio Eiji; ARTIFON, Everson Luiz de Almeida
- Clinical and endoscopic aspects of metastases to the gastrointestinal tract(2019) BENTO, Luiza Haendchen; MINATA, Mauricio Kazuyoshi; BATISTA, Clelma Pires; MARTINS, Bruno da Costa; TOLENTINO, Luciano Henrique Lenz; SCOMPARIM, Rodrigo Corsato; KAWAGUTI, Fabio Shiguehissa; OLIVEIRA, Carla Cristina Gusmon de; LIMA, Marcelo Simas de; GEIGER, Sebastian Naschold; BABA, Elisa Ryoka; SAFATLE-RIBEIRO, Adriana; RIBEIRO JR., Ulysses; MALUF-FILHO, FauzeBackground Studies that describe metastases to the gastrointestinal (GI) tract are restricted to small case series. An increase in the frequency of this condition is expected, so it would be useful to better characterize the endoscopic aspects of metastasis to the GI tract. The aims of this study were to describe the frequency and endoscopic features of the lesions, and to analyze the survival rate after diagnosis of metastasis. Methods This was a retrospective, single-center, observational study, conducted between 2009 and 2017. Patients with metastasis to the GI tract were included. Results 95 patients were included. Melanoma (25.3%), lung (15.8%), and breast (14.7%) were the most frequent primary tumors. The most common endoscopic presentation was a solitary, ulcerated lesion in the gastric body. Conventional biopsy was diagnostic in 98.9% of the cases. The mean and median survival rates were 13.3 months (95% confidence interval [CI] 8.2 - 18.3) and 4.7 months (95%CI 3.7 - 5.6), respectively. Palliative treatment with chcmo and/or radiotherapy after the diagnosis of the metastasis was related to a higher survival rate. Conclusions Melanoma, lung, and breast cancer were the most common primary tumors to metastasize to the Cl tract. The endoscopic features could not predict the primary site of the tumor. The finding of metastasis in the GI tract is related to the final stage of the cancer disease but patients who received palliative treatment with chemo and/or radiotherapy after diagnosis of Cl metastasis had higher survival rates.
- Colonoscopic Ultrasound-Guided Fine-Needle Aspiration Using a Curvilinear Array Transducer: A Single-Center Retrospective Cohort Study(2022) CHENG, Spencer; MATUGUMA, Sergio E.; OLIVEIRA, Guilherme H. P. de; SILVA, Gustavo L. R.; CHENG, Henrique; SANCHEZ-LUNA, Sergio A.; MINATA, Mauricio K.BACKGROUND: Curvilinear array ultrasound transducers enable tissue sampling and have therapeutic capabilities. Nevertheless, colonic intubation and maneuvering with these transducers is technically challenging and is therefore typically limited to the rectosigmoid area. This retrospective cohort study aimed to evaluate the safety, feasibility, and diagnostic yield of colonoscopic ultrasound-guided fine-needle aspiration in deep colonic intubation. IMPACT OF INNOVATION: The impact of this innovation is to enable tissue sampling of colonic and extracolonic lesions guided by endoscopic ultrasound. TECHNOLOGY, MATERIALS, AND METHODS: Curvilinear array ultrasound is used in the evaluation of luminal and extraluminal colonic diseases. Thirteen patients underwent colonoscopic ultrasound with a curvilinear array ultrasound endoscope in a single center for subepithelial lesions, cancer staging, and extracolonic lesions from July 2015 to February 2021. Endosonography was performed using an Olympus EU-ME1 and GF-UCT 180 with a 5-12MHz curvilinear array transducer. The primary outcome was the percentage of patients who were successfully scanned with the endoscopic ultrasound. The secondary outcomes included the success rate of fine-needle aspiration, the diagnostic yield of the tissue samples, and the adverse events related to the procedure. PRELIMINARY RESULTS: A total of 13 female patients underwent colonoscopic ultrasound. All patients (100%, 13/13) were successfully scanned. Fine-needle aspiration was deemed necessary and successfully performed in 100% (5/5) of the patients. Tissue samples collected by fine-needle aspiration resulted in a diagnostic yield of 60%, and no adverse events resulted from this intervention. CONCLUSIONS: This study demonstrates the feasibility of performing colonoscopic ultrasound with a curvilinear array transducer. Fine-needle aspiration for subepithelial, colonic, and extracolonic lesions is feasible and safe in this setting with no adverse events reported in our study. FUTURE DIRECTIONS: Future research should be directed toward validating colonoscopic ultrasound with a curvilinear array transducer technique in prospective randomized trials. Studies evaluating the feasibility and safety of endoscopic ultrasound-guided interventions in the colon, such as abscess drainage and enteral anastomosis, should be considered.