Two Nissen fundoplications were performed by a minimally invasive robotic technique on May 19, 1998. The Mona robot, was placed to the left of the patient. It held and activated surgical tools. The surgeon was placed some 3 meters from the patient and was seated at a console. He was not scrubbed. He commanded the 3 robotic arms by manipulating two handles, while observing a 3 dimensional picture recreated by a binocular system. Manipulations of the handles were translated into digital information by a computer. This information was modified by the computer with downscaling of the amplitude of motion by a factor 1 to 3 or 1 to 5. Physiologic tremor was eliminated. The computer delivered an impulse in command of the articulated robot arms via a 5 m long cable. Operating time was 4.30 hours, and 1.30 hours respectively. Blood loss was estimated at 20 and 30 ml. The two patients were discharged on the first postoperative day after a gastrograffin swallow had been performed in order to check the position of the wrap and its patency. Our experience with the Mona device may suggest that surgical robotics could have an increasingly important role in tomorrow's operating theatres. It should allow for more precise procedures, performed under better circumstances.