G. C. H. Yeung

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The advancement of video-assisted minimally invasive surgery in this decade fostered the successful attempt at endoscopic thyroidectomy in 1997. This technically demanding surgery is now being evaluated in a small number of specialized centers. The procedure earned the most attention in Japan and is performed in more than 20 centers; a conference dedicated(More)
Endoscopic dissection and surgical intervention of the neck is a safe and technically feasible option. A cavity for the operation is made by sharp dissection after preliminary CO2 insufflation of the fascial planes to induce surgical emphysema. We successfully performed three endoscopic parathyroidectomies and five endoscopic hemithyroidectomies without any(More)
BACKGROUND The technical details of endoscopic exploration of parathyroid adenoma are described here, thereby drawing attention to the enormous potential of this new modality of minimal-access surgery. METHODS Four patients with a parathyroid adenoma that was clearly demonstrated by pre-operative localization imaging techniques were subject to endoscopic(More)
Since 1997, successful attempts at endoscopic thyroidectomy have led to controversies. The procedure has, as yet, no alarming operative complication, but its benefits to patients are debatable. By means of very individualized and ingeniously designed approaches, the procedure has proven to be feasible and safe in trained hands. Cautious trials and(More)
The manipulation of the inflamed appendix during laparoscopic surgery and avoiding its disintegration or leakage can be challenging even to experts. A suture loop form through an intravenous catheter may offer the least traumatic handling of the appendix, and it serves the extra benefit of leaving no scar. Furthermore, multiple loops can be formed(More)
Data warehouse systems typically designate downtime for view maintenance, ranging from tens of minutes to hours depending on the system size. In this paper, we develop a multiagent system that achieves immediate incremental view maintenance (IIVM) for continuous updating of data warehouse views. We describe an IIVM system that processes updates as(More)
During laparoscopic cholecystectomy on an elderly patient, we were alarmed to find another "cystic" duct after division of the cystic duct, and the operation was converted to open laparotomy. This is the first documented case in the English literature of duplication of a cystic duct with two ducts joining the common hepatic duct at the same level. This and(More)
The majority of our patients with bleeding duodenal ulcer responded to endoscopic injection treatment. However, in six patients admitted during a 2 1/2-year period, we were forced to do emergency surgery to control the hemorrhage (three with failed injection and persisting exsanguination from a brisk bleeder and three rebled soon after apparent initial(More)
BACKGROUND An intravenous cannula was used experimentally as a cheap and scarless alternative to an endoloop to provide retraction and lumen occlusion. It is also a miniport for introduction of ligatures and small catheters. METHODS This possibility was explored during standard procedures such as laparoscopic cholecystectomy and laparoscopic appendectomy.(More)
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