Hirofumi Kawanaka

ORCID: 0000-0003-0657-7882
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About
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Research Areas
  • Liver Disease and Transplantation
  • Liver Disease Diagnosis and Treatment
  • Organ Transplantation Techniques and Outcomes
  • Gastric Cancer Management and Outcomes
  • Hepatocellular Carcinoma Treatment and Prognosis
  • Helicobacter pylori-related gastroenterology studies
  • Colorectal Cancer Treatments and Studies
  • Metastasis and carcinoma case studies
  • Abdominal Trauma and Injuries
  • Inflammatory mediators and NSAID effects
  • Gastrointestinal Tumor Research and Treatment
  • Cholangiocarcinoma and Gallbladder Cancer Studies
  • Pancreatic and Hepatic Oncology Research
  • Pancreatitis Pathology and Treatment
  • Angiogenesis and VEGF in Cancer
  • Eicosanoids and Hypertension Pharmacology
  • Gastrointestinal disorders and treatments
  • Hernia repair and management
  • Cancer, Hypoxia, and Metabolism
  • Esophageal and GI Pathology
  • Abdominal Surgery and Complications
  • Gallbladder and Bile Duct Disorders
  • Peptidase Inhibition and Analysis
  • Esophageal Cancer Research and Treatment
  • Cardiac, Anesthesia and Surgical Outcomes

National Hospital Organization
2013-2023

Beppu Medical Center
2013-2023

Kyushu University
2007-2017

Fukuoka City Hospital
2009-2017

National Kyushu Medical Center
2003-2011

Clinical Research Institute
2004

Long Beach Medical Center
2000-2002

University of California, Irvine
2000-2002

California State University, Long Beach
2000-2001

Harvard University
2001

Surgical risk of laparoscopic gastrectomy for gastric cancer in high patients was evaluated with E-PASS scoring system.This study based on 63 who underwent gastrectomy; 14 belonging to group (ASA≥3) and 49 classified as low (ASA≤2). Fifty six conventional were used comparison.Intra- postoperative complications found 4 3 patients, respectively. We a significant correlation between score complications. significantly higher than the value group. The estimated in-hospital mortality rate...

10.5754/hge12420 article EN Hepatogastroenterology 2012-07-27

Abstract Background and Aim: Balloon‐occluded retrograde transvenous obliteration (B‐RTO) is a new alternative treatment for gastric varices (GVx), but the long‐term efficacy not known. We investigated effects of B‐RTO on rebleeding, prevention first bleeding, mortality occurrence risky esophageal (EVx). Methods: was performed in 68 cirrhotic patients with GVx. Twenty had recent transiently treated by endoscopic Histoacryl injection or balloon tamponade. Forty‐eight likely to bleed, no...

10.1111/j.1440-1746.2008.05549.x article EN Journal of Gastroenterology and Hepatology 2008-08-18

Portal venous thrombosis (PVT) is a potentially fatal complication following splenectomy. Its mechanisms and risk factors are poorly understood, especially in patients with cirrhosis portal hypertension. This study investigated for PVT splenectomy such patients.All consecutive who underwent Kyushu University Hospital between 1998 2004 were included this retrospective study. They divided into two groups based on the presence or absence of postoperative PVT. Preoperative operative compared,...

10.1002/bjs.7002 article EN British journal of surgery 2010-04-22

The aim of this study was to determine the role antithrombin III (AT-III) in portal vein thrombosis (PVT) after splenectomy cirrhotic patients.There is no standard treatment for PVT liver cirrhosis.A total 50 consecutive patients who underwent laparoscopic hypersplenism were enrolled into study. From January 2005 December 2005, 25 received prophylactic anticoagulation therapy operation (AT-III [-] group). 2006 July 2006, administration AT-III concentrates (1500 U/d) on postoperative day...

10.1097/sla.0b013e3181bdf8ad article EN Annals of Surgery 2009-12-21

In order to improve the prognosis of gastric cancer patients, timely identification second primary cancers is considered be a crucial clinical problem.We analyzed clinicopathological data 2250 patients with regard both synchronous and metachronous cancers.Of 95 (4.2%) had cancer. Both colorectal lung were frequently detected, followed by in liver, esophagus breast. Regarding time detection for such cancers, 65% detected synchronously, while more than 80% metachronously. The was negatively...

10.1159/000072335 article EN Oncology 2003-01-01

Portal vein thrombosis (PVT) is one of the most critical disorders in liver disease patients. These patients have imbalance coagulation and inhibition resulting from decreased levels inhibitory factors, such as protein C, S, antithrombin III (AT-III). We designed this randomized, double-blind, placebo-controlled trial comparing safety efficacy AT-III for PVT with those who received no treatment.Eligible were diagnosed association thrombus, without tumor thrombus more than 50% cross-sectional...

10.1111/hepr.12934 article EN cc-by-nc-nd Hepatology Research 2017-06-30

Nonsteroidal anti-inflammatory drugs (NSAIDs) block prostaglandin synthesis and impair healing of gastrointestinal ulcers growth colonic tumors, in part, by inhibiting angiogenesis. The mechanisms this inhibition are incompletely explained. Here we demonstrate that both nonselective (indomethacin) COX-2-selective (NS-398) NSAIDs inhibit hypoxia-induced vitro angiogenesis gastric microvascular endothelial cells via coordinated sequential events: 1) increased expression the von Hippel-Lindau...

10.1096/fj.01-0589fje article EN The FASEB Journal 2001-12-28

Controversy exists as to the nature of gastric perfusion in portal-hypertensive gastropathy. To investigate portal hemodynamics and mucosal cirrhotic patients with without gastropathy, we subjected 56 hypertension vein catheterization, pneumatic pressure sensor technique, duplex sonography laser Doppler flowmetry. Thirteen had gastropathy: In 10 it was mild, 3 severe. The presence gastropathy seemed be independent age, sex, cause cirrhosis or grade esophageal varices. Portal venous pressure,...

10.1002/hep.1840200609 article EN Hepatology 1994-12-01

Abstract Background The effect of splenomegaly in patients with liver cirrhosis and portal hypertension is not fully understood. This study was designed to determine the laparoscopic splenectomy on haemodynamics these patients. Methods Patients who underwent Kyushu University Hospital from January 2006 March 2009 were evaluated retrospectively. Correlations between splenic size haemodynamics, changes levels vasoactive agents endothelin (ET) 1 nitric oxide metabolites (NOx) before 7–10 days...

10.1002/bjs.9622 article EN British journal of surgery 2014-09-09

Aim Sarcopenia is an independent predictor of mortality and sepsis after living donor liver transplantation (LDLT). However, the exact mechanisms by which sarcopenia affects poor prognosis or worse immunity against postoperative are unclear, particularly regarding muscular amino acid metabolism, authors aimed to identify role plasma acids in retrospective study. Methods The area psoas muscle 228 recipients LDLT was retrospectively measured dynamic computed tomography. Additionally, levels...

10.1111/hepr.12484 article EN Hepatology Research 2015-01-13

To evaluate and compare laparoscopic splenectomy partial splenic embolization as supportive intervention for cirrhotic patients with hypersplenism to overcome peripheral cytopenia before the initiation of during interferon therapy or anticancer hepatocellular carcinoma.Between December 2000 April 2008, 43 Japanese underwent either a facilitate completion carcinoma. We reviewed peri- post-intervention outcomes details subsequent planned main therapies. For therapy, rate completion, treatment...

10.1111/j.1440-1746.2009.06031.x article EN Journal of Gastroenterology and Hepatology 2009-11-20

Abstract Background and Aim: We intended to determine whether laparoscopic splenectomy (Lap‐Sp) contributes treatment with interferon therapy in hepatitis C virus (HCV)‐cirrhotic patients thrombocytopenia caused by hypersplenism. Methods: From December 2004 August 2008, 100 cirrhotic (54 men 46 women) underwent Lap‐Sp for a clinical application of therapy. All the were Child–Pugh class A or B (average platelet count, 56 × 10 3 /mm ). The HCV genotype was type 1 80 2 20 patients. Results:...

10.1111/j.1440-1746.2011.06870.x article EN Journal of Gastroenterology and Hepatology 2011-07-28

In liver cirrhosis, down-regulation of endothelial nitric oxide synthase (eNOS) has been implicated as a cause increased intrahepatic resistance. We investigated whether Rho-kinase activation is one the molecular mechanisms involved in defective eNOS signaling secondary biliary cirrhosis. Liver cirrhosis was induced by bile duct ligation (BDL). measured mean arterial pressure (MAP), portal venous (PVP), and hepatic tissue blood flow (HTBF) during intravenous infusion saline (control), 0.3,...

10.1002/hep.22089 article EN Hepatology 2007-12-31
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