Search results for: Kenta Izaki

Items from 1 to 11 out of 11 results

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The electrical block to polyspermy induced by an intracellular Ca²⁺ increase at fertilization of the clawed frogs, Xenopus laevis and Xenopus tropicalis

Mami Watabe, Kenta Izaki, Shohei Fujino, Mei Maruyama, more

Molecular Reproduction and Development > 86 > 4 > 387 - 403

Polyspermy blocking, to ensure monospermic fertilization, is necessary for normal diploid development in most animals. We have demonstrated here that monospermy in the clawed frog, Xenopus tropicalis, as well as in X. laevis, is ensured by a fast, electrical block to polyspermy on the egg plasma membrane after the entry of the first sperm, which is mediated by the positive‐going fertilization potential...

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HCC-to-liver contrast on arterial-dominant phase images of EOB-enhanced MRI: comparison with dynamic CT

Naoki Kanata, Takeshi Yoshikawa, Yoshiharu Ohno, Tomonori Kanda, more

Magnetic Resonance Imaging > 2013 > 31 > 1 > 17-22

The purpose of this study was to assess the efficacy of arterial-dominant phase images of gadolinium–ethoxybenzyl–diethylenetriamine pentaacetic acid (EOB)-enhanced magnetic resonance imaging (MRI) for evaluation of arterial blood supply in hepatocellular carcinoma (HCC) in comparison with that of multiphasic dynamic computed tomography (CT). This study comprised 30 patients (22 men and 8 women, mean...

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Is Embolization of the Pancreas Safe? Pancreatic Histological Changes after Selective Transcatheter Arterial Embolization with N-Butyl Cyanoacrylate in a Swine Model

Takuya Okada, Masato Yamaguchi, Takuya Takahashi, Kenta Izaki, more

CardioVascular and Interventional Radiology > 2012 > 35 > 1 > 161-167

Purpose This study was designed to evaluate the safety of selective transcatheter arterial embolization (TAE) with N-butyl cyanoacrylate (NBCA) in a swine model in terms of histological changes in the pancreas. Methods Three groups of two female swine (58–64 kg) per group underwent TAE of the dorsal pancreatic artery, under anesthesia, with 1:1, 1:4, and 1:9 mixtures of NBCA and iodized oil. Blood...

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N-butyl Cyanoacrylate Embolization for Pseudoaneurysms Complicating Pancreatitis or Pancreatectomy

Kenta Izaki, Masato Yamaguchi, Ryota Kawasaki, Takuya Okada, more

Journal of Vascular and Interventional Radiology > 2011 > 22 > 3 > 302-308

To evaluate the clinical effectiveness and safety of transcatheter arterial embolization with n-butyl cyanoacrylate (NBCA) for pseudoaneurysms complicating pancreatitis or pancreatectomy.Twelve procedures were performed in nine patients (seven men and two women; mean age, 60.6 years) for pseudoaneurysms that occurred secondary to pancreatitis or as a consequence of pancreatic juice leakage at the...

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Percutaneous Selective Embolectomy using a Fogarty Thru-Lumen Catheter for Pancreas Graft Thrombosis: A Case Report

Kenta Izaki, Masato Yamaguchi, Ippei Matsumoto, Makoto Shinzeki, more

CardioVascular and Interventional Radiology > 2011 > 34 > 3 > 650-653

A 57-year-old woman with a history of diabetes mellitus underwent simultaneous pancreas–kidney transplantation. The pancreaticoduodenal graft was implanted in the right iliac fossa. The donor’s portal vein was anastomosed to the recipient’s inferior vena cava (IVC). Seven days after the surgery, a thrombus was detected in the graft veins. Percutaneous thrombolysis was immediately performed; however,...

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Endovascular obliteration of bleeding duodenal varices in patients with liver cirrhosis

Carlos Armando Zamora, Koji Sugimoto, Masakatsu Tsurusaki, Kenta Izaki, more

European Radiology > 2006 > 16 > 1 > 73-79

The purpose of this paper is to describe our experience with endovascular obliteration of duodenal varices in patients with liver cirrhosis and portal hypertension. Balloon-occluded transvenous retrograde and percutaneous transhepatic anterograde embolizations were performed for duodenal varices in five patients with liver cirrhosis, portal hypertension, and decreased liver function. All patients...

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Bleeding Duodenal Varices Successfully Treated with Balloon-Occluded Retrograde Transvenous Obliteration (B-RTO) Assisted by CT During Arterial Portography

Masakatsu Tsurusaki, Koji Sugimoto, Shinichi Matsumoto, Kenta Izaki, more

CardioVascular and Interventional Radiology > 2006 > 29 > 6 > 1148-1151

A 60-year-old woman with massive hemorrhage from duodenal varices was transferred to our hospital for the purpose of transcatheter intervention. Although digital subtraction arterial portography could not depict the entire pathway of collateral circulation, the efferent route of the duodenal varices was clearly demonstrated on subsequent CT during arterial portography. Balloon-occluded retrograde...

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Portosplenic Blood Flow Separation in a Patient with Portosystemic Encephalopathy and a Spontaneous Splenorenal Shunt

Carlos Armando Zamora, Koji Sugimoto, Masakatsu Tsurusaki, Masato Yamaguchi, more

Journal of Vascular and Interventional Radiology > 2004 > 15 > 8 > 875-879

A patient with portosystemic encephalopathy, hyperammonemia, and a spontaneous splenorenal shunt was admitted to the authors' institution after a failed attempt at transvenous retrograde shunt obliteration. As an alternative approach, the authors separated splenic and portal flows by embolizing only the proximal splenic vein while leaving the shunt intact. Thus, the splenic flow could escape into...

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Renal Arteriovenous Fistula with Rapid Blood Flow Successfully Treated by Transcatheter Arterial Embolization: Application of Interlocking Detachable Coil as Coil Anchor

Takeki Mori, Koji Sugimoto, Takanori Taniguchi, Masakatsu Tsurusaki, more

CardioVascular and Interventional Radiology > 2004 > 27 > 4 > 374-376

A 70-year-old woman presented to our outpatient clinic with a large idiopathic renal arteriovenous fistula (AVF). Transcatheter arterial embolization (TAE) using interlocking detachable coils (IDC) as an anchor was planned. However, because of markedly rapid blood flow and excessive coil flexibility, detaching an IDC carried a high risk of migration. Therefore, we first coiled multiple loops of a...

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Application of Balloon-Occluded Retrograde Transvenous Obliteration to Gastric Varices Complicating Refractory Ascites

Tetsuya Fukuda, Shozo Hirota, Shinichi Matsumoto, Koji Sugimoto, more

CardioVascular and Interventional Radiology > 2004 > 27 > 1 > 64-67

We report two cases of gastric varices complicated by massive ascites that disappeared after balloon-occluded retrograde transvenous obliteration (B-RTO). The first patient had progressive gastric varices that continued to enlarge even after three episodes of esophagogastric variceal bleeding, and the second patient was admitted to our hospital because of the bleeding from gastric varices. After B-RTO...