Satoshi Obata

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This paper describes a biped walking control system based on the reactive force interaction control at the foothold. 1) robust control of reactive force/torque interaction at the foothold based on Cartesian space motion controller. 2) the posture control considering the physical constraints of the reactive force/torque at the foothold by quadratic(More)
PURPOSE This study evaluated the stability and risk of single-incision laparoscopic percutaneous extraperitoneal closure (SILPEC) for pediatric inguinal hernia performed by inexperienced pediatric surgeons versus conventional LPEC procedure. METHODS Between 2011 and 2012, a randomized prospective study was performed comparing SILPEC (n = 37, 16 uni- and(More)
We developed and evaluated a visual compensation system that allows surgeons to visualize obscured regions in real time, such that the surgical instrument appears virtually transparent. The system consists of two endoscopes: a main endoscope to observe the surgical environment, and a supporting endoscope to render the region hidden from view by surgical(More)
Pediatric surgeons require highly advanced skills when performing endoscopic surgery; however, their experience is often limited in comparison to general surgeons. The aim of this study was to evaluate the effectiveness of endoscopic surgery training for less-experienced pediatric surgeons and then compare their skills before and after training. Young(More)
PURPOSE We developed a system to objectively verify the endoscopic surgical skills of pediatric surgeons. MATERIALS AND METHODS We developed a thoracoscopic model of congenital diaphragmatic hernia mimicking a newborn's size. The examinees were divided into Experts (n = 10) and Trainees (n = 19), and each group performed two tasks (Task 1, reduction of a(More)
This study aimed to identify detailed differences in laparoscopic surgical processes between expert and novice surgeons in a training environment and demonstrate that surgical process modeling can be used for such detailed analysis. Eleven expert surgeons each of whom had performed $${>}500$$ > 500 laparoscopic procedures were compared with 10 young(More)
OBJECTIVES Acetylcholinesterase (AChE) staining has become the gold standard for definitively diagnosing Hirschsprung disease (HD), although some pitfalls have been reported. We reevaluated a large series at our institute in order to validate the accuracy of AChE staining for detecting HD. METHODS A retrospective study of the rectal mucosal specimens of(More)
The purpose of this study was to develop a new objective assessment system for the suture ligature method employed in the laparoscopic intestinal anastomosis model. Suturing skills were evaluated objectively using this system. This study compared 17 expert surgeons, each of whom had performed >500 laparoscopic procedures, with 36 novice surgeons, each of(More)
We developed and validated a specific laparoscopic fundoplication simulator for use with the objective endoscopic surgical skills evaluation system. The aim of this study was to verify the quality of skills of surgeons. We developed a 1-year-old infant body model based on computed tomography data and reproduced pneumoperitoneum model based on the clinical(More)
   An endoscopic system is needed that presents informative images irrespective of the surgical situation and the number of degrees of freedom in endoscopic manipulation. This goal may be achieved with a virtual reality view for a region of interest from an arbitrary viewpoint. An endoscopic pseudo-viewpoint alternation system for this purpose was developed(More)