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Dive into the research topics where Ryo Kanata is active.

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Featured researches published by Ryo Kanata.


Internal Medicine | 2015

Efficacy of combined balloon-occluded retrograde transvenous obliteration and simultaneous endoscopic injection sclerotherapy.

Wataru Sato; Kentaro Kamada; Takashi Goto; Shigetoshi Ohshima; Kouichi Miura; Tomomi Shibuya; Takahiro Dohmen; Ryo Kanata; Toshitaka Sakai; Mitsuru Chiba; Yuko Sugimoto; Shinichiro Minami; Koichi Ishiyama; Manabu Hashimoto; Hirohide Ohnishi

OBJECTIVE We evaluated the efficacy and safety of balloon-occluded retrograde transvenous obliteration (B-RTO) performed using absolute ethanol with iodized oil (ET+LPD) and simultaneous endoscopic injection sclerotherapy (EIS) with cyanoacrylate (CA) for gastric varices (GVs). METHODS A total of 16 patients with endoscopically proven high-risk GVs treated using combined B-RTO with ET+LPD and EIS with CA between January 2007 and July 2012 were enrolled. RESULTS Twelve cases included GVs involving both the cardia and fundus, two cases included fundal varices and two cases included cardiac varices. In terms of the form of GVs, 10 cases involved F2 lesions and six cases involved F3 lesions. The flow vein was the left gastric vein in 13 cases and the posterior gastric vein in three cases. The drainage route was a splenorenal shunt in all cases. The average dose of ET+LPD was 12.0 mL, while that of CA was 2.45 mL. All complications were transient, and no major complications occurred after the procedures. None of the patients experienced bleeding or recurrence of gastric varices after the combined B-RTO and EIS procedures during an average follow-up period of 38.3 months. CONCLUSION Combined B-RTO with ET+LPD and simultaneous EIS with CA is considered to be an effective and safe procedure for treating GVs.


Endoscopy International Open | 2018

Needle fracture during endoscopic ultrasound-guided fine needle aspiration using a needle with a side hole

Takashi Sasaki; Ryo Kanata; Naoki Sasahira

Background and study aims  Endoscopic ultrasound-guided fine needle aspiration (EUS-FNA) is widely performed to obtain pathological evidence from several parts of the body. Major complications of EUS-FNA are bleeding, pancreatitis, and abdominal pain. Needle fracture is a rare complication of EUS-FNA and only a few relevant reports are available. Here, we report a case of needle fracture during EUS-FNA using a needle with a side hole. A 61-year-old man underwent EUS-FNA of the uncinate process of the pancreas to confirm malignancy. A 20-gauge needle with a side hole was used to puncture the mass from the first part of the duodenum. The needle fracture occurred at the side hole during the third passage, and the fragment remained in the pancreas. Fortunately, the patient did not exhibit any symptoms due to the needle fragment. This case indicates that repeated puncture using the same needle with a side hole might increase risk of needle fracture during EUS-FNA. It is important to inform clinicians about the potential risk of needle fracture, particularly given the increasing number of EUS-FNAs being performed.


Journal of Clinical Oncology | 2016

The impact of modified Glasgow Prognostic Scale as a predictor of survival advantage by FOLFIRINOX in metastatic pancreatic cancer.

Ikuhiro Yamada; Masato Ozaka; Ryo Kanata; Kei Saito; Takashi Sasaki; Masato Matsuyama; Kouichi Takano; Naoki Sasahira

440 Background: The superiority of FOLFIRINOX (FFX) therapy over gemcitabine (Gem) alone in patients with metastatic pancreatic cancer (mPC) has been demonstrated in ACCORD11. However, this combina...


Gastroenterology | 2014

Su1476 Efficacy of Combined Balloon-Occluded Retrograde Transvenous Obliteration With Ethanol and Endoscopic Injection Sclerotherapy for Gastric Varices

Wataru Sato; Takashi Goto; Kentaro Kamada; Shigetoshi Ohshima; Kouichi Miura; Takahiro Dohmen; Ryo Kanata; Toshitaka Sakai; Mitsuru Chiba; Yuko Sugimoto; Shinichiro Minami; Hirohide Ohnishi

excluded. Several clinical, biological, ultrasonographic, with Doppler study, and endoscopic data were collected and used to calculate the APRI score (AST to platelets ratio index) and congestion index (CI) of the portal vein (calculated by dividing portal vein cross-sectional area by portal blood velocity). All statistical analysis was performed with SPSS v. 18.0 and a p value of less than 0,05 was considered statistically significant. The performance of the scores was evaluated by the area under the receiver operating characteristic curve (AUROC). Results: 36 patients were included, 64% males, with mean age 60±8,6 years. On On endoscopy, 12 patients (33%) had no EV, 14 patients (39%) had small EV and 10 patients (28%) had large EV. Portal vein diameter was higher in patients with EV than those without EV, while platelet count and portal blood velocity were lower, however with no statistical difference, (p>0,05). APRI score and CI were good predictors for the presence of EV (AUROC 0.74 and 0,635 respectively). The combination of the APRI score for liver fibrosis and CI as a surrogate of portal hypertension resulted in an even more powerful predictor of the presence of EV (AUROC 0,797) and the best cutoff value was 0,075 (sensitivity 79,2%, specificity 75%, positive predictive value 86,4% and negative predictive value 64,3). Conclusions: APRI score and CI of the portal vein are good noninvasive tests to predict esophageal varices. The combination of both models is even more powerful to be used as a method to select cirrhotic patients who need to undergo upper GI endoscopy.


Gastroenterology | 2014

Su1471 Noninvasive Evaluation of the Risk of Hepatocellular Carcinoma Oncogenesis in Chronic Hepatic Disease by Measuring Shear Wave Velocity

Junichi Fujiwara; Takashi Goto; Tomomi Shibuya; Mitsuru Chiba; Shigetoshi Ohshima; Kouichi Miura; Wataru Sato; Takahiro Dohmen; Kentaro Kamada; Ryo Kanata; Toshitaka Sakai; Yuko Sugimoto; Shinichiro Minami; Hirohide Ohnishi

Partially Hydrolyzed Guar Gum (PHGG) Attenuates Nonalcoholic Steatohepatitis (NASH) in Mice Through the Gut-Liver Axis Kazuhiro Katada, Yuji Naito, Tomohisa Takagi, Katsura Mizushima, Yasuki Higashimura, Tetsuya Okayama, Naohisa Yoshida, Kazuhiro Kamada, Kazuhiko Uchiyama, Ishikawa Takeshi, Osamu Handa, Hideyuki Konishi, Nobuaki Yagi, Hiroshi Ichikawa, Zenta Yasukawa, Makoto Tokunaga, Tsutomu Okubo, Lekh R. Juneja, Yoshito Itoh


Internal Medicine | 2014

Successful treatment of hepatocellular carcinoma with lung metastasis using hepatic and bronchial artery infusion chemotherapy.

Tatsuki Yoshida; Kentaro Kamada; Kouichi Miura; Takashi Goto; Shigetoshi Ohshima; Wataru Sato; Tomomi Shibuya; Takahiro Dohmen; Ryo Kanata; Toshitaka Sakai; Mitsuru Chiba; Junichi Fujiwara; Yuko Sugimoto; Mitsuaki Ishioka; Itsuki Hasegawa; Kenichi Takahashi; Shinichiro Minami; Akashi Fujita; Manabu Hashimoto; Hirohide Ohnishi


Internal Medicine | 2013

A Chronic Subdural Hematoma in a Patient Receiving Combination Therapy with Pegylated Interferon Alfa-2b and Ribavirin for Chronic Hepatitis C

Takashi Goto; Shigetoshi Ohshima; Kouichi Miura; Tomomi Shibuya; Wataru Sato; Takahiro Dohmen; Kentaro Kamada; Ryo Kanata; Toshitaka Sakai; Mitsuru Chiba; Yuko Sugimoto; Shinichiro Minami; Hirohide Ohnishi


Journal of Clinical Oncology | 2016

The impact of maximum tumor shrinkage of primary site (MTSP) by FOLFIRINOX in the first-line treatment of pancreatic cancer.

Kei Saito; Masato Ozaka; Ryo Kanata; Ikuhiro Yamada; Takashi Sasaki; Masato Matsuyama; Kouichi Takano; Naoki Sasahira


Journal of Clinical Oncology | 2018

Second-line treatment of modified FOLFIRINOX or nab-paclitaxel plus gemcitabine for metastatic pancreatic adenocarcinoma.

Masato Ozaka; Takashi Sasaki; Ikuhiro Yamada; Ryo Kanata; Dai Akiyama; Tomoko Katagiri; Koichi Takano; Masato Matsuyama; Naoki Sasahira


Gastrointestinal Endoscopy | 2018

Mo1284 HIGH HISTPATHOLOGICAL ACCURACY OF EUS-FNA FOR SOLID PANCREATIC MASSES BY USING 20G FORWARD BEVEL CORE BIOPSY NEEDLE. RESULT OF A PROSPECTIVE STUDY

Ryo Kanata; Ikuhiro Yamada; Masato Matsuyama; Takashi Sasaki; Seita Kataoka; Kazunaga Ishigaki; Tomoko Katagiri; Dai Akiyama; Masato Ozaka; Koichi Takano; Yutaka Takazawa; Naoki Isizuka; Naoki Sasahira

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