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Objectives In laparoscopic liver surgery, intraoperative navigation is strongly recommended. We developed a navigation system based on intraoperative ultrasound (IOUS). The purpose of this study was to evaluate the usefulness and accuracy of this system using an animate model. Materials and methods Augmented reality (AR) visualization superimposing(More)
BACKGROUND Laparoscopic suturing skills are important for advanced laparoscopic surgery. However, objective assessment of these skills has not yet been established. The aim of this study was to assess the laparoscopic suturing skills of novice and experienced surgeons using an electromagnetic motion-tracking system. METHODS A total of 18 surgeons, who(More)
BACKGROUND AND AIM Balloon-occluded retrograde transvenous obliteration (B-RTO) is a new alternative treatment for gastric varices (GVx), but the long-term efficacy is not known. We investigated the long-term effects of B-RTO on rebleeding, prevention of first bleeding, mortality and occurrence of risky esophageal varices (EVx). METHODS B-RTO was(More)
BACKGROUND This study was carried out to investigate whether eye-hand coordination skill on a virtual reality laparoscopic surgical simulator (the LAP Mentor) was able to differentiate among subjects with different laparoscopic experience and thus confirm its construct validity. METHODS A total of 31 surgeons, who were all right-handed, were divided into(More)
Computer-enhanced robotic surgery has now been introduced into general surgical practice. The robotic system enables us to manipulate endoscopic instruments, as well as instruments during open surgical intervention, regarding both the operative field and operation techniques. This technologic innovation should therefore help surgeons overcome various(More)
OBJECTIVE The aim of this study was to determine the role of antithrombin III (AT-III) in portal vein thrombosis (PVT) after splenectomy in cirrhotic patients. SUMMARY BACKGROUND DATA There is no standard treatment for PVT after splenectomy in liver cirrhosis. METHODS A total of 50 consecutive cirrhotic patients who underwent laparoscopic splenectomy(More)
Portal hypertensive gastropathy (PHG) is recognized as a clinical entity in portal hypertension, but the pathogenesis of PHG is still unclear. Therefore, we reviewed the current state of knowledge concerning the portal hypertensive gastric mucosa and hypothesized the pathogenesis of PHG. Elevated portal pressure can induce changes of local hemodynamics,(More)
BACKGROUND/PURPOSE The aims of this study were to standardize the techniques of laparoscopic splenectomy (LS) to improve safety in liver cirrhosis patients with portal hypertension. METHODS From 1993 to 2008, 265 cirrhotic patients underwent LS. Child-Pugh class was A in 112 patients, B in 124, and C in 29. Since January 2005, we have adopted the(More)
Portal hypertensive (PHT) gastric mucosa increases susceptibility to injury and delayed mucosal healing. It is possible that nitration of ERK by peroxynitrite might alter MAPK (ERK) signaling in PHT gastric mucosa, leading to delayed mucosal healing, since excessive nitric oxide production is implicated in PHT gastric mucosa and MAPK (ERK) signaling induces(More)