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Force feedback is widely assumed to enhance performance in robotic surgery, but its benefits have not yet been systematically assessed. In this study we examine the effects of force feedback on a blunt dissection task. Subjects used a telerobotic system to expose an artery in a synthetic model while viewing the operative site with a video laparoscope.(More)
OBJECTIVE To examine the hypothesis that elective laparoscopic repair should be routinely performed on patients with asymptomatic or minimally symptomatic paraesophageal hernias. SUMMARY BACKGROUND DATA The management of asymptomatic paraesophageal hernias is a controversial issue. Most surgeons believe that all paraesophageal hernias should be corrected(More)
BACKGROUND There is a large and growing gap between the need for better surgical training methodologies and the systems currently available for such training. In an effort to bridge this gap and overcome the disadvantages of the training simulators now in use, we developed the Computer-Enhanced Laparoscopic Training System (CELTS). METHODS CELTS is a(More)
The lack of data on in-vivo material properties of soft tissues has been a significant impediment in the development of virtual reality based surgical simulators that can provide the user with realistic visual and haptic feedback. As a first step towards characterizing the mechanical behavior of organs, this work presents in-vivo force response of the liver(More)
Dysphagia after laparoscopic Nissen fundoplication (LNF) is commonly attributed to edema and/or improperly constructed wraps, and in some instances the cause can be difficult to identify. We report, for the first time, the development of secondary achalasia after LNF as a cause of late-onset postoperative dysphagia. A total of 250 consecutive patients(More)
Gastrointestinal weight-loss surgery (GIWLS) is currently the most effective treatment for severe obesity, with Roux en-Y gastric bypass (RYGB) among the best of the available surgical options. Despite its widespread clinical use, the mechanisms by which RYGB induces its profound weight loss remain largely unknown. This procedure effects weight loss by(More)
—Force feedback is widely assumed to enhance performance in robotic surgery, but its benefits have not yet been systematically assessed. In this study we examine the effects of force feedback on a blunt dissection task. 20 subjects used a telerobotic system to expose an artery in a synthetic model while viewing the operative site with a video laparoscope.(More)
BACKGROUND At the advent of laparoscopic adrenalectomy it seemed timely to us to assess the advantages and the overall results of the different techniques that are currently used in an approach to adrenalectomy. PATIENTS AND METHODS Between 1984 and 1995, 165 patients underwent adrenalectomy. Eighty-six patients (37 men and 49 women with a mean age of(More)