We report a case of inferior pancreaticoduodenal artery aneurysms with chronic occlusion of the celiac artery. A 47-year-old man was admitted to our hospital because an epigastric hypo echoic mass was detected by abdominal ultrasonography during a screening examination. Enhanced abdominal computed tomography revealed two aneurysms at the inferior pancreaticoduodenal artery and total occlusion of the celiac artery. First, we performed bypass grafting from the left renal artery to the splenic artery using retroperitoneal approach. Second, we performed coil embolization of the inferior pancreaticoduodenal artery using interventional radiology techniques. The aneurysms were occluded, and no splanchnic circulatory disturbance occurred.

JAMSTEC has operated autonomous underwater vehicles (AUVs) for scientific survey of seabed mineral resources. Conventionally, it is difficult for one support vessel to track plural AUVs in one operation. However, it takes a long time for one AUV to survey a large target area. To solve this problem JAMSTEC has developed an autonomous surface vehicle (ASV) with MHI. The vehicle instead of the support vessel, autonomously tracks AUV(s) and monitors its progress, enabling the simultaneous operation of multiple AUVs and thereby the survey of a larger target area within a given period of time. An important role of the ASV is to relay underwater communication and aerial communication because the underwater communication range is very small. ASV tracks AUV autonomously to keep the acoustic communication, and send AUV information to the support vessel by using radio waves.

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