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Your search keyword '"Masanori Ozaki, MD"' showing total 3 results
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3 results on '"Masanori Ozaki, MD"'

1. Percutaneous transhepatic sclerotherapy for ascending colonic varices due to left-sided portal hypertension

Author

Fumi Sasaki, MD, Atsushi Jogo, MD, PhD, Akira Yamamoto, MD, PhD, Ken Kageyama, MD, PhD, Akane Tashiro, MD, Yasuhito Mitsuyama, MD, Tatsushi Oura, MD, Kazuki Matsushita, MD, Kazuo Asano, MD, Eisaku Terayama, MD, Masanori Ozaki, MD, Yuki Sakai, MD, Shohei Harada, MD, Kazuki Murai, MD, PhD, Mariko Nakano, MD, PhD, Ryuichi Kita, MD, PhD, Toshio Kaminou, MD, PhD, and Yukio Miki, MD, PhD

Subjects
Left-sided portal hypertension, Colonic varices, Pancreatoduodenectomy, Percutaneous transhepatic sclerotherapy, Medical physics. Medical radiology. Nuclear medicine, R895-920
Abstract

Left-sided portal hypertension (LSPH) causes varices and splenomegaly due to splenic vein issues. Colonic varices are rare and lack standardized treatment. We report the successful treatment of colonic varices caused by LSPH, by addressing both the afferent and efferent veins. A 70-year-old man with distal cholangiocarcinoma had surgery without splenic vein resection, leading to proximal splenic vein stenosis and varices at multiple locations. Percutaneous transhepatic splenic venography revealed that collateral veins flowed into the ascending colonic varices and returned to the portal vein. Complete thrombosis of the varices was achieved by injecting sclerosants and placing coils in both the afferent and efferent veins. The procedure was safe and effective, with no variceal recurrence. This approach provides a minimally invasive option for treating colonic varices associated with LSPH.

Published
2024
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2. Afferent vein embolization via retrograde approach as a potential treatment strategy for bleeding duodenal varices

Author

Atsushi Jogo, MD, PhD, Akira Yamamoto, MD, PhD, Ken Kageyama, MD, PhD, Fumi Sasaki, MD, Tatsushi Oura, MD, Yasuhito Mitsuyama, MD, Eisaku Terayama, MD, Kazuki Matsushita, MD, Kazuo Asano, MD, Yuki Sakai, MD, Masanori Ozaki, MD, Shohei Harada, MD, Kazuki Murai, MD, PhD, Mariko Nakano, MD, PhD, Etsuji Sohgawa, MD, Ryuichi Kita, MD, PhD, Toshio Kaminou, MD, PhD, and Yukio Miki, MD, PhD

Subjects
Ruptured duodenal varices, Balloon-occluded retrograde transvenous obliteration, Afferent vein embolization, Medical physics. Medical radiology. Nuclear medicine, R895-920
Abstract

The standard treatment for ruptured duodenal varices remains to be established. Emergency balloon-occluded retrograde transvenous obliteration is challenging in patients with bleeding because re-rupture of varices can occur due to increased pressure when using the retrograde approach. Herein, we describe a case in which a catheter was retrogradely advanced to the afferent vein beyond bleeding duodenal varices; however, the varices re-ruptured during coil embolization, and a part of the catheter was deviated into the intestinal tract. The rupture site was embolized by liquid embolic materials from the microcatheter. Embolization via retrograde approach needs to be carefully performed.

Published
2023
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3. Transcatheter embolization for stomal varices: A report of three patients

Author

Masanori Ozaki, MD, Atsushi Jogo, PhD, Akira Yamamoto, PhD, Toshio Kaminou, PhD, Masao Hamuro, PhD, Etsuji Sohgawa, PhD, Ken Kageyama, PhD, Satoyuki Ogawa, MD, Kazuki Murai, MD, Takehito Nota, MD, Hiroki Yonezawa, MD, and Yukio Miki, PhD

Subjects
Bleeding stomal varices, Balloon-occluded retrograde transvenous obliteration, Direct puncture, Medical physics. Medical radiology. Nuclear medicine, R895-920
Abstract

Stomal varices are rare and ectopic varices defined as dilated portosystemic collateral veins located in sites other than the gastro-esophageal region. These sometimes cause recurrent bleedings and can be life-threatening. Optimal treatments have yet to be established. We report 3 cases of repetitive bleeding stomal varices in which resolution of bleeding was obtained over the medium term with minimally invasive approaches including balloon-occluded retrograde transvenous obliteration and variceal embolization by ultrasound-guided direct puncture. Rebleeding did not occur in any patients within 2-15 months of follow-up. Serious complications over Clavien-Dindo grade I were not found.

Published
2021
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